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Causes of high fuel consumption. Updated 26Jan2007

Civic model year 1980 - 2000
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garilee
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Causes of high fuel consumption. Updated 26Jan2007

Post by garilee » Fri Jan 19, 2007 10:18 am

Juz help share some tips for every1 to identify and solve your high fuel consumption problems:

A) Faulty O2 sensor (common problem)
This is connect to yr exhaust manifold and detects the engine air/fuel ratio. It will feedback to yr ecu to adjust yr fuel map.. so if it detects lean a/f, ecu add more fuel. If it detects rich a/f, ecu deduct fuel to yr engine. So this sensor is VERY IMPORTANT for good fuel consumption! This sensor got wear & tear also and expected life is abt 50,000km to 100,000km. when the sensor starts to die, it usually signal low voltage to the ecu and ecu automatically keeps adding fuel to yr engine. 2nd sensors can be bought at scrap yards for $50-70 but u take the risk if the sensors are faulty. New ones costs more than $200. ESI and DOHC sensors are compatible but the DOHC sensors design seems more durable.
An easy way to identify this prob is to reset yr ecu by removing the 15A fuse from the fuse box under yr bonnet. This will erase the ecu memory and reset back to factory settings. If its confirm O2 sensor prob, yr car will run better and slowly worsen as the O2 sensor starts feedback to the ecu.

B) Faulty coolant temperature sensor (usually common in wet weather)
This is connect to yr engine header to detects the engine temperature. It will feedback to yr ecu to adjust yr fuel map.. if it detects temperature below 80degrees, ecu add more fuel. i havent heard much people change this sensor coz in most times, we are worried more on overheating prob than colder temp. But it can be a prob with fuel consumption when the weather is cold. Mine went haywire recently and i detected it thru a digital meter.. bought a new piece at less than $30 fr Tanly.
Unless u have a digital water temp gauge connected to this sensor, it is quite difficult to detect this prob

C) Faulty fan switch/ fan main relay / fan switch set to direct(usually common in wet weather)
The fan switch is connect just beside the thermostat housing to detect the coolant temperature. if it detects temperature above the fan switch temp (different fan switch have diff operating temp, like mugen ones which activate at abt 80+ degees versus stock ones at 90+ degrees), the radiator fan activates to cool the radiator. faulty fan/ main relay/ fan set to direct on have the same effect as (B) above. It can cause the coolant temp sensor to detect low temp, resulting in ecu adding fuel to the engine. By the way, for those with relay failure, i found a shop at King georges that sell the relay for only $7 per piece compare to abt $20 at stockists.
The easiest way to find out if it is relay prob is to use a multi meter to test the socket of the fan switch with ignition on. For the fan switch itself, have to remove and soak the sensor part in hot water and use multi meter test the points. another obvious sign is the fan turns on immediately when u turn on yr ignition

D) Leaking exhaust extractor
Have came across cases where the connecting point of the exhaust extractor can crack, there is gasket leak and those bros that weld 2 bolts to the extractor to reuse stock cover broke with a hole in the piping (common to 4-2-1 or 4-1 aftermarket extractors). This can coz the engine to lose compression and poor fuel combustion.. u end up with much higher fuel consumption.
check for signs of cracks or holes in the extractor. With the engine running, u may hear slight hissing sound or air pressure from the leaking area. welding works to mend holes & cracks usually not much

E) Foul spark plugs
Spark plugs can foul (or drown) when the plugs are too cold for yr engine set-up. The most common prob is ur engine a/f ratio is too rich and usually happen if u mod or touch anything on yr fuel system like fuel regulator pressure too high, injectors too big etc. See (F).
juz remove all yr plugs and check. If its covered with black carbon, u have to change new spark plugs and retify the problem in ur fuel system

F) Fuel system
Injectors can spoil or get dirty, injectors too big, fuel pressure regulator set too high, fuel pump too big for yr set-up.. these can cause rich a/f ratio if yr engine is not properly tuned.

G) Running without a thermostat
Same as (B) and (C)

H) Engine tuned by tuner with faulty/inaccurate lambda sensor
This 1 beri obvious rite? Poor tuning due to rich a/f ratio by tuner definitely high fuel consumption lor.

I) Faulty main fuel relay (COMMON PROBLEM)
This main relay controls the power to yr fuel pump, injectors, ecu, distributor and wear & tear of the relay can coz inconsistent power supplied to any of the components, the most common being difficulty in starting car.
it doesnt hurt to change a new relay to be safe coz it only costs abt $35 considering the significant control this relay has on the key components of yr car

J) Faulty distributor
The distributor is the main component in firing up yr plugs. the common wear & tear occurs at the coil, rotor and igniter. weak coil=weak voltage to power up the spark plugs to ignite. faulty igniter can coz wrong firing of the spark plugs and worn rotor=improper distribution of the voltage to the 4 spark plug wires. The common signs are significant poor fuel consumption and occasional engine jerking especially when engine under load.
there is standard wear & tear in these parts and it is not easy to diagnose the actual problem. it is advisable to change all 3 components together

K) unhealthy engine-internal
Engine with worn valve seals and/or worn piston rings causes low engine compression (similiar to (D)). U usually get lots of blackish smoke when u go WOT or high engine revs. also makes yr car lose engine oil
Can do engine compression test and leakdown test to confirm

L) leaking engine head gasket
Leaking head gasket cause the same problem of low engine compression (see (D)). On top of that, coolant could leak into the combustion chamber and create low engine temp (similiar to (B)). In addition, unburnt coolant would escape through the exhasut extractor and over time, it could contaminate your O2 sensor (see (A)) and kill it.
usually visible oil leaks at the edge of the engine head and brownish/murky color deposits in the radiator. for slight leaks, u will notice bubbles in the coolant with the radiator cap off & engine running

M) Faulty air intake temperature sensor
This is connect at the side of yr intake manifold to detects air temp flowing into the engine. It will feedback to yr ecu to adjust yr fuel map.. if it detects cold temperature, ecu add more fuel. seldom hear this sensor will spoil but it can be a prob with fuel consumption if it starts reading low voltage even when intake air is warm.. creating rich a/f ratio
Unless u have a digital air temp gauge connected to this sensor, it is quite difficult to detect this prob

N) Faulty ECU (quite common these days)
This 1 also obvious answer coz its the brain of the whole car. Furthermore, most of the civics already more than 10 years old.. can imagine how old the ecu is?? Its electronics and electronics got lifespan. only a matter of time before it dies.. juz like a motherboard of a computer.
My ultimate recommendation.. save $ and get a standalone if u intend to keep the car long. If not, juz wait for the dreadful day to come..

O) Tyres:low pressure, performance tyres and bigger tyres
Low yr tyre pressure, performance tyres and biiger tyres all give u more grip on the road surface creating friction=more energy required to move the car=higher fuel consumption.
make sure yr tyre are properly inflated, dun use high grade tyres if u dun have the applications for it and stick to 15" rims

P) Weight
Heavy car=more load=more energy to push=more fuel required. Simple rite? thats why u see fast cars using carbon fibre and fibre bonnets etc.
dump anything that u dun need in the car. THIS IS THE NO.1 WAY TO MOD A CAR.. PERIOD!! and its free.. unless u try to be innovative using plastic windows

Q) jammed brake caliper
brake calipers also need servicing.. if too much dirt and debris get stuck to the brake pistons, it can get jam.. thats when ur engine have to work hard to push the extra load created by the braking
jack car up and roll wheels to check lor

R) worn injector seals
injector seals are made of rubber and over time, with the heat of the engine compartment, it might wear off.
yellow stains on the intake manifold where the injectors are installed and smell of fresh fuel

S) distributor adjusted too retarded
distributors can be shifted to adjust the engine's ignition timing=timing of firing of the spark plugs. This is a VERY IMPORTANT area becoz it affects ignition and engine relies on proper a/f ratio and ignition timing to run properly. if distributor adjusted too retard, there wont be enough ignition to burn fuel properly=richer a/f ratio. If distributer adjusted too advance, u risk engine knocking=engine damage.
best to let wkshop or experienced ppl to check for u. Coz u dun want to adjust wrongly and cause serious engine damage

T) insufficient engine grounding
based on my own experience while tuning my car, i realised slight electrical surges and fluctuations that affects the a/f ratio and rpm readings. i suspected poor grounding and after i added some grounding wires to the distributor and intake manifold area.. it actually solves the prob. Interesting fact to justify adding grounding wires to the engine bay. Up to u to believe me though..
try to ground components where there are electrical flows like distributor, alternator, intake manifold etc. anyway, if no $, can also use cheap wires to ground.. it serves the same effect anyway

U) faulty MAP sensor (COMMON PROBLEM)
MAP sensor is mounted just above the throttle body (older design throttle bodies like d15b have it mounted separately on the engine bay firewall). Faulty map sensor creates inconsistent signals to engine ecu and results in inconsistent a/f ratio..
the only way to detect is when yr car starts having inconsistent performce like running rich 1day and going lean the next day.. i found out thru inconsistent readings fr my lambda sensor.. after changing the map sensor.. a/f ratio returns back consistent

ANY1 ELSE WANT TO ADD ON MORE INFO?? PLS DO SO..
Last edited by garilee on Sat Jan 27, 2007 12:24 am, edited 18 times in total.
Version RR => Recon TypeR :butthead:

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forrestcat
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Re: What can cause high fuel consumption? Some Tips

Post by forrestcat » Fri Jan 19, 2007 11:59 am

garilee wrote:Juz help share some tips for every1 to identify and solve your high fuel consumption problems:

A) Faulty O2 sensor (common problem)
This is connect to yr exhaust manifold and detects the engine air/fuel ratio. It will feedback to yr ecu to adjust yr fuel map.. so if it detects lean a/f, ecu add more fuel. If it detects rich a/f, ecu deduct fuel to yr engine. So this sensor is VERY IMPORTANT for good fuel consumption! This sensor got wear & tear also and expected life is abt 50,000km to 100,000km. when the sensor starts to die, it usually signal low voltage to the ecu and ecu automatically keeps adding fuel to yr engine. 2nd sensors can be bought at scrap yards for $50-70 but u take the risk if the sensors are faulty. New ones costs more than $200. ESI and DOHC sensors are compatible but the DOHC sensors design seems more durable.
An easy way to identify this prob is to reset yr ecu by removing the 15A fuse from the fuse box under yr bonnet. This will erase the ecu memory and reset back to factory settings. If its confirm O2 sensor prob, yr car will run better and slowly worsen as the O2 sensor starts feedback to the ecu.

B) Faulty coolant temperature sensor (usually common in wet weather)
This is connect to yr engine header to detects the engine temperature. It will feedback to yr ecu to adjust yr fuel map.. if it detects temperature below 80degrees, ecu add more fuel. i havent heard much people change this sensor coz in most times, we are worried more on overheating prob than colder temp. But it can be a prob with fuel consumption when the weather is cold.
Unless u have a digital water temp gauge connected to this sensor, it is quite difficult to detect this prob

C) Faulty fan switch/ fan main relay / fan switch set to direct(usually common in wet weather)
The fan switch is connect just beside the thermostat housing to detect the coolant temperature. if it detects temperature above the fan switch temp (different fan switch have diff operating temp, like mugen ones which activate at abt 80+ degees versus stock ones at 90+ degrees), the radiator fan activates to cool the radiator. faulty fan/ main relay/ fan set to direct on have the same effect as (B) above. It can cause the coolant temp sensor to detect low temp, resulting in ecu adding fuel to the engine.
The easiest way to find out if it is relay prob is to use a multi meter to test the socket of the fan switch with ignition on. For the fan switch itself, have to remove and soak the sensor part in hot water and use multi meter test the points. another obvious sign is the fan turns on immediately when u turn on yr ignition

D) Leaking exhaust extractor
Have came across cases where the connecting point of the exhaust extractor can crack, there is gasket leak and those bros that weld 2 bolts to the extractor to reuse stock cover broke with a hole in the piping (common to 4-2-1 or 4-1 aftermarket extractors). This can coz the engine to lose compression and poor fuel combustion.. u end up with much higher fuel consumption.
check for signs of cracks or holes in the extractor. With the engine running, u may hear slight hissing sound or air pressure from the leaking area. welding works to mend holes & cracks usually not much

E) Foul spark plugs
Spark plugs can foul (or drown) when the plugs are too cold for yr engine set-up. The most common prob is ur engine a/f ratio is too rich and usually happen if u mod or touch anything on yr fuel system like fuel regulator pressure too high, injectors too big etc. See (F).
juz remove all yr plugs and check. If its covered with black carbon, u have to change new spark plugs and retify the problem in ur fuel system

F) Fuel system
Injectors can spoil or get dirty, injectors too big, fuel pressure regulator set too high, fuel pump too big for yr set-up.. these can cause rich a/f ratio if yr engine is not properly tuned.

G) Running without a thermostat
Same as (B) and (C)

H) Engine tuned by tuner with faulty/inaccurate lambda sensor
This 1 beri obvious rite? Poor tuning due to rich a/f ratio by tuner definitely high fuel consumption lor.

I) Faulty main fuel relay
This main relay controls the power to yr fuel pump, injectors, ecu, distributor and wear & tear of the relay can coz inconsistent power supplied to any of the components, the most common being difficulty in starting car.
it doesnt hurt to change a new relay to be safe coz it only costs abt $35 considering the significant control this relay has on the key components of yr car

I) Faulty distributor
The distributor is the main component in firing up yr plugs. the common wear & tear occurs at the coil, rotor and igniter. weak coil=weak voltage to power up the spark plugs to ignite. faulty igniter can coz wrong firing of the spark plugs and worn rotor=improper distribution of the voltage to the 4 spark plug wires. The common signs are significant poor fuel consumption and occasional engine jerking especially when engine under load.
there is standard wear & tear in these parts and it is advisable to change all 3 components together
Thumbs up for bro garilee! Yahoo :D

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Thug
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Re: What can cause high fuel consumption? Some Tips

Post by Thug » Fri Jan 19, 2007 2:43 pm

garilee wrote:Juz help share some tips for every1 to identify and solve your high fuel consumption problems:

A) Faulty O2 sensor (common problem)
This is connect to yr exhaust manifold and detects the engine air/fuel ratio. It will feedback to yr ecu to adjust yr fuel map.. so if it detects lean a/f, ecu add more fuel. If it detects rich a/f, ecu deduct fuel to yr engine. So this sensor is VERY IMPORTANT for good fuel consumption! This sensor got wear & tear also and expected life is abt 50,000km to 100,000km. when the sensor starts to die, it usually signal low voltage to the ecu and ecu automatically keeps adding fuel to yr engine. 2nd sensors can be bought at scrap yards for $50-70 but u take the risk if the sensors are faulty. New ones costs more than $200. ESI and DOHC sensors are compatible but the DOHC sensors design seems more durable.
An easy way to identify this prob is to reset yr ecu by removing the 15A fuse from the fuse box under yr bonnet. This will erase the ecu memory and reset back to factory settings. If its confirm O2 sensor prob, yr car will run better and slowly worsen as the O2 sensor starts feedback to the ecu.

B) Faulty coolant temperature sensor (usually common in wet weather)
This is connect to yr engine header to detects the engine temperature. It will feedback to yr ecu to adjust yr fuel map.. if it detects temperature below 80degrees, ecu add more fuel. i havent heard much people change this sensor coz in most times, we are worried more on overheating prob than colder temp. But it can be a prob with fuel consumption when the weather is cold.
Unless u have a digital water temp gauge connected to this sensor, it is quite difficult to detect this prob

C) Faulty fan switch/ fan main relay / fan switch set to direct(usually common in wet weather)
The fan switch is connect just beside the thermostat housing to detect the coolant temperature. if it detects temperature above the fan switch temp (different fan switch have diff operating temp, like mugen ones which activate at abt 80+ degees versus stock ones at 90+ degrees), the radiator fan activates to cool the radiator. faulty fan/ main relay/ fan set to direct on have the same effect as (B) above. It can cause the coolant temp sensor to detect low temp, resulting in ecu adding fuel to the engine.
The easiest way to find out if it is relay prob is to use a multi meter to test the socket of the fan switch with ignition on. For the fan switch itself, have to remove and soak the sensor part in hot water and use multi meter test the points. another obvious sign is the fan turns on immediately when u turn on yr ignition

D) Leaking exhaust extractor
Have came across cases where the connecting point of the exhaust extractor can crack, there is gasket leak and those bros that weld 2 bolts to the extractor to reuse stock cover broke with a hole in the piping (common to 4-2-1 or 4-1 aftermarket extractors). This can coz the engine to lose compression and poor fuel combustion.. u end up with much higher fuel consumption.
check for signs of cracks or holes in the extractor. With the engine running, u may hear slight hissing sound or air pressure from the leaking area. welding works to mend holes & cracks usually not much

E) Foul spark plugs
Spark plugs can foul (or drown) when the plugs are too cold for yr engine set-up. The most common prob is ur engine a/f ratio is too rich and usually happen if u mod or touch anything on yr fuel system like fuel regulator pressure too high, injectors too big etc. See (F).
juz remove all yr plugs and check. If its covered with black carbon, u have to change new spark plugs and retify the problem in ur fuel system

F) Fuel system
Injectors can spoil or get dirty, injectors too big, fuel pressure regulator set too high, fuel pump too big for yr set-up.. these can cause rich a/f ratio if yr engine is not properly tuned.

G) Running without a thermostat
Same as (B) and (C)

H) Engine tuned by tuner with faulty/inaccurate lambda sensor
This 1 beri obvious rite? Poor tuning due to rich a/f ratio by tuner definitely high fuel consumption lor.

I) Faulty main fuel relay (COMMON PROBLEM)
This main relay controls the power to yr fuel pump, injectors, ecu, distributor and wear & tear of the relay can coz inconsistent power supplied to any of the components, the most common being difficulty in starting car.
it doesnt hurt to change a new relay to be safe coz it only costs abt $35 considering the significant control this relay has on the key components of yr car

J) Faulty distributor
The distributor is the main component in firing up yr plugs. the common wear & tear occurs at the coil, rotor and igniter. weak coil=weak voltage to power up the spark plugs to ignite. faulty igniter can coz wrong firing of the spark plugs and worn rotor=improper distribution of the voltage to the 4 spark plug wires. The common signs are significant poor fuel consumption and occasional engine jerking especially when engine under load.
there is standard wear & tear in these parts and it is not easy to diagnose the actual problem. it is advisable to change all 3 components together

K) unhealthy engine-internal
Engine with worn valve seals and/or worn piston rings causes low engine compression (similiar to (D)). U usually get lots of blackish smoke when u go WOT or high engine revs. also makes yr car lose engine oil
Can do engine compression test and leakdown test to confirm

L) leaking engine head gasket
Leaking head gasket cause the same problem of low engine compression (see (D)). On top of that, coolant could leak into the combustion chamber and create low engine temp (similiar to (B)). In addition, unburnt coolant would escape through the exhasut extractor and over time, it could contaminate your O2 sensor (see (A)) and kill it.
usually visible oil leaks at the edge of the engine head and brownish/murky color deposits in the radiator. for slight leaks, u will notice bubbles in the coolant with the radiator cap off & engine running

M) Faulty air intake temperature sensor
This is connect at the side of yr intake manifold to detects air temp flowing into the engine. It will feedback to yr ecu to adjust yr fuel map.. if it detects cold temperature, ecu add more fuel. seldom hear this sensor will spoil but it can be a prob with fuel consumption if it starts reading low voltage even when intake air is warm.. creating rich a/f ratio
Unless u have a digital air temp gauge connected to this sensor, it is quite difficult to detect this prob

N) Faulty ECU (quite common these days)
This 1 also obvious answer coz its the brain of the whole car. Furthermore, most of the civics already more than 10 years old.. can imagine how old the ecu is?? Its electronics and electronics got lifespan. only a matter of time before it dies.. juz like a motherboard of a computer.
My ultimate recommendation.. save $ and get a standalone if u intend to keep the car long. If not, juz wait for the dreadful day to come..

O) Tyres:low pressure, performance tyres and bigger tyres
Low yr tyre pressure, performance tyres and biiger tyres all give u more grip on the road surface creating friction=more energy required to move the car=higher fuel consumption.
make sure yr tyre are properly inflated, dun use high grade tyres if u dun have the applications for it and stick to 15" rims

P) Weight
Heavy car=more load=more energy to push=more fuel required. Simple rite?
dump anything that u dun need in the car. THIS IS THE NO.1 WAY TO MOD A CAR.. PERIOD!! and its free.. unless u try to be innovative using plastic windows
You mentioned about running without a termostat. I think that would be me. My ESi is running without a termostat. Maybe this is one of cause why I can't hit the similiar milleage from a tank like b4.

Any idea how much would one cost and where to get it?

Thanks in Advance.
-:- I grow up very poor. If I wasn't a boy; I would have nothing to play with -:-

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garilee
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Re: What can cause high fuel consumption? Some Tips

Post by garilee » Fri Jan 19, 2007 2:49 pm

Thug wrote:You mentioned about running without a termostat. I think that would be me. My ESi is running without a termostat. Maybe this is one of cause why I can't hit the similiar milleage from a tank like b4.

Any idea how much would one cost and where to get it?

Thanks in Advance.
stock ones are cheap and u can get them from honda stockist like Tanly. Its quite easy to install as well. juz 2 size 10 nuts to remove the thermostat housing but have to be careful and make sure the thermostat is facing the right direction. U need to top up coolant after that :wink:
Version RR => Recon TypeR :butthead:

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Re: What can cause high fuel consumption? Some Tips

Post by AhHwo » Fri Jan 19, 2007 4:06 pm

garilee wrote:
Thug wrote:You mentioned about running without a termostat. I think that would be me. My ESi is running without a termostat. Maybe this is one of cause why I can't hit the similiar milleage from a tank like b4.

Any idea how much would one cost and where to get it?

Thanks in Advance.
stock ones are cheap and u can get them from honda stockist like Tanly. Its quite easy to install as well. juz 2 size 10 nuts to remove the thermostat housing but have to be careful and make sure the thermostat is facing the right direction. U need to top up coolant after that :wink:

u mention that when turning the ignition on the fan starts to run. this is happening to me. so is it the thermostat or the fan switch?

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Re: What can cause high fuel consumption? Some Tips

Post by forrestcat » Fri Jan 19, 2007 4:13 pm

garilee wrote:
Thug wrote:You mentioned about running without a termostat. I think that would be me. My ESi is running without a termostat. Maybe this is one of cause why I can't hit the similiar milleage from a tank like b4.

Any idea how much would one cost and where to get it?

Thanks in Advance.
stock ones are cheap and u can get them from honda stockist like Tanly. Its quite easy to install as well. juz 2 size 10 nuts to remove the thermostat housing but have to be careful and make sure the thermostat is facing the right direction. U need to top up coolant after that :wink:
An alternative to Tanly is Koon Sing Enterprise.
It's a low profile Honda stockist which sells their stuff
at a relatively cheap price.
I get all my EG parts from them.
I've already pm some bros here regarding the shop add.
Any bros interested can pm me for the address too :D

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garilee
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Re: What can cause high fuel consumption? Some Tips

Post by garilee » Fri Jan 19, 2007 4:14 pm

AhHwo wrote:u mention that when turning the ignition on the fan starts to run. this is happening to me. so is it the thermostat or the fan switch?
yr fan is running direct all the time means the wiring to yr fan switch have been modified or yr fan switch is faulty. Alot of wkshop do this to prevent overheating prob.. or covering up other engine problem.
U risk wearing off yr fan motor very fast.. fan dies.. engine 100% overheat.. :wink:
Version RR => Recon TypeR :butthead:

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garilee
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Re: What can cause high fuel consumption? Some Tips

Post by garilee » Fri Jan 19, 2007 4:15 pm

forrestcat wrote:An alternative to Tanly is Koon Sing Enterprise.
It's a low profile Honda stockist which sells their stuff
at a relatively cheap price.
I get all my EG parts from them.
I've already pm some bros here regarding the shop add.
Any bros interested can pm me for the address too :D
can juz post the rough location lor. anyway, they are stockist mah..
Version RR => Recon TypeR :butthead:

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Re: What can cause high fuel consumption? Some Tips

Post by AhHwo » Fri Jan 19, 2007 4:23 pm

garilee wrote:
AhHwo wrote:u mention that when turning the ignition on the fan starts to run. this is happening to me. so is it the thermostat or the fan switch?
yr fan is running direct all the time means the wiring to yr fan switch have been modified or yr fan switch is faulty. Alot of wkshop do this to prevent overheating prob.. or covering up other engine problem.
U risk wearing off yr fan motor very fast.. fan dies.. engine 100% overheat.. :wink:
am i right to say, means engine have been overheat b4? what if i connect back the fan wiring.

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garilee
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Re: What can cause high fuel consumption? Some Tips

Post by garilee » Fri Jan 19, 2007 4:31 pm

AhHwo wrote:
garilee wrote:
AhHwo wrote:u mention that when turning the ignition on the fan starts to run. this is happening to me. so is it the thermostat or the fan switch?
yr fan is running direct all the time means the wiring to yr fan switch have been modified or yr fan switch is faulty. Alot of wkshop do this to prevent overheating prob.. or covering up other engine problem.
U risk wearing off yr fan motor very fast.. fan dies.. engine 100% overheat.. :wink:
am i right to say, means engine have been overheat b4? what if i connect back the fan wiring.
its likely ur car had an overheating prob b4. Check whether the fan switch socket had been cut, if there is no socket, its abit diff to reconnect to the fan switch (very likely case). If the socket is there, there is probably a wire inserted into the socket to connect the 2 contact points to activate the fan. juz remove the wire and insert the socket into yr fan switch. :wink:
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forrestcat
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Re: What can cause high fuel consumption? Some Tips

Post by forrestcat » Fri Jan 19, 2007 4:34 pm

garilee wrote:
forrestcat wrote:An alternative to Tanly is Koon Sing Enterprise.
It's a low profile Honda stockist which sells their stuff
at a relatively cheap price.
I get all my EG parts from them.
I've already pm some bros here regarding the shop add.
Any bros interested can pm me for the address too :D
can juz post the rough location lor. anyway, they are stockist mah..
Hi Bro Garilee,
ok, since there's request...
here goes:-

Koon Sing Enterprise
40, Dunlop Street (Opp Sim Lim Tower)
Tel: 6294 1243

They only carry Honda parts :twisted:

Cheers
Forrestcat

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garilee
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Re: What can cause high fuel consumption? Some Tips

Post by garilee » Fri Jan 19, 2007 4:37 pm

forrestcat wrote:Koon Sing Enterprise
40, Dunlop Street (Opp Sim Lim Tower)
Tel: 6294 1243

They only carry Honda parts :twisted:
they open on sat?
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Re: What can cause high fuel consumption? Some Tips

Post by AhHwo » Fri Jan 19, 2007 5:47 pm

garilee wrote:
AhHwo wrote:
garilee wrote: yr fan is running direct all the time means the wiring to yr fan switch have been modified or yr fan switch is faulty. Alot of wkshop do this to prevent overheating prob.. or covering up other engine problem.
U risk wearing off yr fan motor very fast.. fan dies.. engine 100% overheat.. :wink:
am i right to say, means engine have been overheat b4? what if i connect back the fan wiring.
its likely ur car had an overheating prob b4. Check whether the fan switch socket had been cut, if there is no socket, its abit diff to reconnect to the fan switch (very likely case). If the socket is there, there is probably a wire inserted into the socket to connect the 2 contact points to activate the fan. juz remove the wire and insert the socket into yr fan switch. :wink:

i went to check, i but all conect properly leh....... any idea what to do?
Last edited by AhHwo on Fri Jan 19, 2007 6:00 pm, edited 1 time in total.

b16c5
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Post by b16c5 » Fri Jan 19, 2007 5:47 pm

nowadays this folder alot of tcss..glad to see bro garilee to come out with this useful write up..think bros here with this prob noes where to start looking at..thanx!

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garilee
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Re: What can cause high fuel consumption? Some Tips

Post by garilee » Fri Jan 19, 2007 6:02 pm

AhHwo wrote:i went to check, i tink the wire had been remove.... any idea what to do?
easy way is to go scrap yard to get a spare socket. However, a cheapo way is to use 2 separate small connectors (muz be able to slot into each pin inside the fan switch) and insert into the fan switch.
Version RR => Recon TypeR :butthead:

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