Unanswered topics Active topics

Causes of high fuel consumption. Updated 26Jan2007

Civic model year 1980 - 2000
- b A s -
2000rpm
2000rpm
Posts: 35
Joined: Tue Mar 14, 2006 2:03 am
Location: Yishun

Post by - b A s - » Tue Apr 22, 2008 10:29 pm

i'm getting only 300km per full tank. really horrible man. tried asking shops anyways to check how come FC so high. but they say no way to check one. =[ tried reading on the possible cause of high consumption. but don't understand alot of things. haha.

User avatar
aNvo
7000rpm VTEC ON
7000rpm VTEC ON
Posts: 859
Joined: Sun Aug 24, 2008 2:58 am

Post by aNvo » Sun Sep 21, 2008 1:25 pm

pinkielouis wrote:hey all bros here... i seriously need some help with my eg9.... i pump a full tank but up till almost empty (almost touching the last marking) i can only travel up till 340+ and i nv on my vtec.... any idea what the hell is wrong with my car....
Im having the same problem. full tank will last ranging from 340-370. but im on auto. normal drive. nv rev up more than 3k rpm b4. shit man. wats wrong wats wrong? :roll: :roll: :roll:

User avatar
tensaixp
6000rpm VTEC ON
6000rpm VTEC ON
Posts: 579
Joined: Wed Aug 30, 2006 3:29 pm

Post by tensaixp » Mon Nov 03, 2008 9:32 pm

hi, recently my car sometimes accelerate rpm like stuck, then after while like the resistance release then rev cont to climb. n fc is damn bad, used to clock 11+, now less than 10. dunno if its coincidence or wat, but it happened not long after i change 4-2-1, decatted and retuened afc...

User avatar
garilee
9000rpm Rev Cut
9000rpm Rev Cut
Posts: 2647
Joined: Sun Jan 30, 2005 12:32 pm
Location: NorthEast

Post by garilee » Thu Nov 27, 2008 5:36 pm

tensaixp wrote:hi, recently my car sometimes accelerate rpm like stuck, then after while like the resistance release then rev cont to climb. n fc is damn bad, used to clock 11+, now less than 10. dunno if its coincidence or wat, but it happened not long after i change 4-2-1, decatted and retuened afc...
dont quite understand yr prob. need to describe abit more clearly
Version RR => Recon TypeR :butthead:

Goofy7
1000rpm
1000rpm
Posts: 17
Joined: Mon Jan 01, 2007 3:15 pm
Location: North
Contact:

Re: Causes of high fuel consumption. Updated 26Jan2007

Post by Goofy7 » Mon Jan 12, 2009 5:53 am

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

hi, my water temp gauge reading 80-82 deg when car is stationary. But when car is moving, the gauge reading start to drop to 50-60 deg, sometime 40+. The temp shoot up again when car is stop, I think the gauge got no problem since the needle can move up & down. Is it the water temp sensor problem? Pls advice. Thanks...

User avatar
Num3ga
6000rpm VTEC ON
6000rpm VTEC ON
Posts: 481
Joined: Mon Jan 12, 2009 12:36 am

Re: Causes of high fuel consumption. Updated 26Jan2007

Post by Num3ga » Wed Jan 14, 2009 3:19 am

Goofy7 wrote: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

hi, my water temp gauge reading 80-82 deg when car is stationary. But when car is moving, the gauge reading start to drop to 50-60 deg, sometime 40+. The temp shoot up again when car is stop, I think the gauge got no problem since the needle can move up & down. Is it the water temp sensor problem? Pls advice. Thanks...
Bro is your fan working?. Maybe just worn fan bearings . Your fan moving at slower speed to cool the radiator.Since the meter shows lower temp when u drive.

User avatar
garilee
9000rpm Rev Cut
9000rpm Rev Cut
Posts: 2647
Joined: Sun Jan 30, 2005 12:32 pm
Location: NorthEast

Re: Causes of high fuel consumption. Updated 26Jan2007

Post by garilee » Wed Jan 14, 2009 11:11 pm

Goofy7 wrote:hi, my water temp gauge reading 80-82 deg when car is stationary. But when car is moving, the gauge reading start to drop to 50-60 deg, sometime 40+. The temp shoot up again when car is stop, I think the gauge got no problem since the needle can move up & down. Is it the water temp sensor problem? Pls advice. Thanks...
yr temp fluctuate too much to be normal. wat does the analog water temp in yr speedo shows? My guess is:
1) water temp guage wiring never install properly
2) water temp sensor spoil (but u would have felt poorer car performance)
3) no thermostat (abit unlikely)
Version RR => Recon TypeR :butthead:

civic`esi
6000rpm VTEC ON
6000rpm VTEC ON
Posts: 525
Joined: Sun Nov 13, 2005 10:10 pm
Location: East

Re: Causes of high fuel consumption. Updated 26Jan2007

Post by civic`esi » Fri Jan 16, 2009 4:54 am

Goofy7 wrote:hi, my water temp gauge reading 80-82 deg when car is stationary. But when car is moving, the gauge reading start to drop to 50-60 deg, sometime 40+. The temp shoot up again when car is stop, I think the gauge got no problem since the needle can move up & down. Is it the water temp sensor problem? Pls advice. Thanks...

50-60 deg is too low leh .. normal is abt 80-95 deg ba
Image

User avatar
pgm iv
7000rpm VTEC ON
7000rpm VTEC ON
Posts: 954
Joined: Mon Jun 27, 2005 11:36 pm
Location: island wide
Contact:

Post by pgm iv » Mon Apr 20, 2009 12:01 am

hi bro what is the stock fuel regulator pressure for b16a engine? thank
Image

User avatar
garilee
9000rpm Rev Cut
9000rpm Rev Cut
Posts: 2647
Joined: Sun Jan 30, 2005 12:32 pm
Location: NorthEast

Post by garilee » Thu Apr 23, 2009 5:59 pm

pgm iv wrote:hi bro what is the stock fuel regulator pressure for b16a engine? thank
b16/d16 is same abt +/- 3bar without vacuum.
Version RR => Recon TypeR :butthead:

User avatar
pgm iv
7000rpm VTEC ON
7000rpm VTEC ON
Posts: 954
Joined: Mon Jun 27, 2005 11:36 pm
Location: island wide
Contact:

Post by pgm iv » Mon Apr 27, 2009 1:00 am

garilee wrote:
pgm iv wrote:hi bro what is the stock fuel regulator pressure for b16a engine? thank
b16/d16 is same abt +/- 3bar without vacuum.
bro what do u mean with out vacuum?
Image

swat80
3000rpm
3000rpm
Posts: 44
Joined: Thu Apr 09, 2009 1:12 pm

Post by swat80 » Mon Apr 27, 2009 3:58 pm

hi to all bro.. anyone can explain the function of a vacuum meter???
my vacuum meter always struck ard 25 and at gear 1 and 2, the vacuum meter is at 15hg even when i ram hard..

at stationary, the meter still showing 20-25hg.. wats wrong with it??

User avatar
garilee
9000rpm Rev Cut
9000rpm Rev Cut
Posts: 2647
Joined: Sun Jan 30, 2005 12:32 pm
Location: NorthEast

Post by garilee » Sun May 03, 2009 12:12 am

pgm iv wrote:
garilee wrote:
pgm iv wrote:hi bro what is the stock fuel regulator pressure for b16a engine? thank
b16/d16 is same abt +/- 3bar without vacuum.
bro what do u mean with out vacuum?
there is a small rubber pipe fr the intake manifold to the fuel regulator. Plug out the pipe to get the pressure reading
Version RR => Recon TypeR :butthead:

User avatar
pgm iv
7000rpm VTEC ON
7000rpm VTEC ON
Posts: 954
Joined: Mon Jun 27, 2005 11:36 pm
Location: island wide
Contact:

Post by pgm iv » Mon May 25, 2009 11:58 pm

bro how high is the fuel pressure for b18c5 engine? stock?
Image

User avatar
Emperorcivic
9000rpm Rev Cut
9000rpm Rev Cut
Posts: 3055
Joined: Wed May 02, 2007 4:02 pm
Location: Singapore
Contact:

Post by Emperorcivic » Wed Apr 28, 2010 1:13 pm

sohc got thermostat?

Post Reply