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RPM goes higher when downshift

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hammerdin
5000rpm
5000rpm
Posts: 291
Joined: Thu Sep 03, 2009 10:16 pm

RPM goes higher when downshift

Post by hammerdin » Mon Jul 01, 2013 11:17 pm

basically I have this issue:

driving at 50km/hr, on gear 3.
traffic light in front about 50m, tap brake, and clutch in, change to gear 2.
about 20m from traffic light, clutch in.
RPM will start to drop from 2500 to 900, then when car is about 5km/hr about 3m before i stop, the RPM suddenly increase to 1500 for about 0.5 sec and then drop to 900 when I stop.

this happen frequently when travelling slowly.

I have clean my simota open pod and also clean the throttlebody, but seemed that problem still there.

anyone have any idea whats the issue?

Shamie
5000rpm
5000rpm
Posts: 291
Joined: Wed Jun 13, 2007 10:33 pm
Location: Whampoa

Post by Shamie » Fri Jul 05, 2013 2:02 am

Maybe tb Nvr clean properly? It might also be air leak I think
ThE UgLy SiLvEr OnE!

hammerdin
5000rpm
5000rpm
Posts: 291
Joined: Thu Sep 03, 2009 10:16 pm

Post by hammerdin » Fri Jul 05, 2013 10:03 am

clean already... even fuel injector....

could it be the sensor spoilt?

Teow Yiwei
4000rpm
4000rpm
Posts: 114
Joined: Sun Aug 02, 2009 11:41 am

Post by Teow Yiwei » Fri Jul 05, 2013 10:07 am

idle air control valve got clean?

hammerdin
5000rpm
5000rpm
Posts: 291
Joined: Thu Sep 03, 2009 10:16 pm

Post by hammerdin » Sun Jul 07, 2013 11:11 pm

I think mine no idling valve sensor.....

ecu also resetted, but still have this issue....

Shamie
5000rpm
5000rpm
Posts: 291
Joined: Wed Jun 13, 2007 10:33 pm
Location: Whampoa

Post by Shamie » Tue Jul 09, 2013 8:25 pm

Check and see if it does the same thing in neutral. sounds like a leak or like bro teow said, iacv.
ThE UgLy SiLvEr OnE!

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