JDM B18C struggling and little backfire

**gambate** · 18-09-2010 07:50 PM

Originally Posted by MM89

also cold starts are wierd...revs up to 2,000rpm immediately and within 10 seconds returns to a 1100rpm idle until it warms up.
idle can be quite inconsistent and after a period of start and stop driving, the idle begins to rise a little above 1000rpm upon coming to a full top.
it may even hunt around for a little bit. i'm assuming i may have stuffed the IACV?

try reduce the IAC duty cycle in SManager under: parameter->idle
or reduce the water temp compensation under: parameter-> fuel compensation
--hondata dump too much fuel for cold start in my case if leave this unadjusted from "stock-itr" map.
maybe uncheck "closed loop operation" if you are using stock O2 sensor setup.
adjusting the above works for me...

**sangyz** · 18-09-2010 08:18 PM

Originally Posted by zropts

I did launch it hard a couple of times the night before this started to happen.

If this happened I'd say change your tps to a brand new one. This happened to my jdm b18c and it doesn't through a cel code.

**zropts** · 18-09-2010 10:15 PM

Since TPS is cheapest replacement part of the others, might buy a new one and test it out.

**zropts** · 22-09-2010 11:16 AM

Still yet to test TPS tonight, and replace injectors when they come in. In the meanwhile, mechanic stated that my cylinder #2 contains a little oil on spark plugs and piston #2 is possibly not working 100% therefore the jerking at low rpms but at mid range to high rpms, its all good.

Is there any internal mechanical problems I should be worried about?

**EG30** · 23-09-2010 05:24 AM

no microcracks on your dizzy caps or dizzy rotor by any chance?

**p3akin** · 23-09-2010 08:16 AM

change th timing belt, dizzy and/or tighten up the timing belt.. timing belt could be loose

**Bludger** · 24-09-2010 02:03 PM

Originally Posted by p3akin

change th timing belt, dizzy and/or tighten up the timing belt.. timing belt could be loose

I don't see how that relates to his problem........

**zropts** · 24-09-2010 02:08 PM

Tested the plug wires (green and red) on TPS when plugged in and turned the ignition to second click. No voltage reading. Can this be the TPS is gone?