turbo_coupe_EJ1

i have a 94 civic ex with a D16z6 and the problem is when it gets hot outside its like my car is missin at an idle or tryin to flood its self when it idles but when i start to drive it , it drives just fine and there is also a lot of carbon on my bumper and the CEL isnt even on either so if you might have a solution let me know


Thanks

MelJ

Check your ignition components, vacuum lines and the IAC just to be safe if you haven't already.

turbo_coupe_EJ1

thats honestly the only thing i havent done

TRIZ

iTrader: (14)

I would clean the throttle body thoroughly, gearbox has a good DIY on it

turbo_coupe_EJ1

i already did that twice and i know its not a sensor cause the CEL would be on and its not , would a blown head gasket cause this cause my radiator cap has the milky grey oil around it

BlueEM2

iTrader: (1)

Check the link in my signature and troubleshoot away.

turbo_coupe_EJ1

but its not over heating but i have changed the distributor , plug wires , plugs , fuel filter , fuel pressure regulator , cleaned the throttle body. Would the tps have something to do with it

HommeDeBois

You could always try, all you need to check it is a paperclip and a multimeter. The paperclip is so you don't tear up your plug/wiring with the probe from the multimeter- and your reading should be at .5 v at low idle and 4.5v at wide open throttle. I think it's the red wire- but you'd better check.

turbo_coupe_EJ1

well update its my iacv cause when its hot outside it sticks wide open and when it cools off it runs just fine

HommeDeBois

How did you discover that it was your IACV? What was your troubleshooting process? (I'm having idle problems myself)

turbo_coupe_EJ1

i just had my car running and while it was running i unplugged my map sensor and of course the motor died and then i unplugged my iacv while the switch was on and my iacv was making a humming noise and when i plugged it back in the iacv made a noise that sounded a lot like someone taping my intake with a wrench so thats what i replaced and it fixed it