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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

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

 
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thats honestly the only thing i havent done

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

 
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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

 
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Check the link in my signature and troubleshoot away.

 
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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

 
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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.

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

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

 
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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