https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/check-oil-light-car-dying-2635603/
https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/how-fix-your-idleing-woes-fitv-iacv-2153910/

car dying after long drives when warmed up at idle. question i have, do zc singles have a FITV??? I only have the top whole in my throttle body. I dont have a lower hole.

 

If you don't have the lower hole inside the Throttle body, you don't have a FITV.

FITV usually only come on obd1 mani's.

Are you throwing any codes?

 

no, no codes at all. this is really pissing me off. my problem so closely resemples a problem with the fitv. i hate when my car dies at stop lights lol ><

 

FITV usually causes idle surging not dying at stop signs.

It only dies when it's up to temp not when it's cold?

 

exactly, ive always had a little bit of a bad idle. the idle surge gets so bad and the rpms get so low that the engine turns off. i honestly think that is the problem unlessu have any other ideas

 

Have the car running, and then unplug the IACV if the car dies, you know the IACV isn't working properly, it should have a real fast surge idle if it's working properly. Should fluctuate ~250-500 rpm max when it's unplugged.

Have you removed the Idle Air control valve and cleaned out the little screen?

Have you tried to screw the idle screw out raising the idle a little bit?

 

Interesting, never knew that. Ill try it out at break, im at work right now lol ><

I cleaned the hell out of the IACV about 6 months ago.

No i havnt tryed screwing the idle to raise it.

 

Like if you are sitting idle does the car just idle low and then die or does it go up and down and then die?

Raising the idle might help if the car idles to low and it just ends up dying, maybe it won't get that low with the idle screw adjusted up. That's what I would check anyways.

 

Bump since im still open to options and opinions

 

Bump