Car Is Missing...help?

[imported_1blkex]

Ok I really haven't had much time to diagnois this one so I figured I'd ask around first. My car just recently started missing at idle with only a slight drop in RPM. Odd thing is it will only do it once it's warmed up. Also if I hold the motor at say 2000RPMs with no load the R's will fluctuate from 2000 to 1500-1700 Rpms back and forth. I figure it's probablt a sensor acting up but I ain't throwin any codes so....

[Goldenboy]

1.IACV
2.thermostat
3.the hamster under your hood has a cold

[imported_1blkex]

thermostat? Explain that one please...

[CeeReX]

For a minute there,i really thought your car was missing.

[pandora63]

Originally posted by CivicHB@Jan 14 2004, 06:33 AM
For a minute there,i really thought your car was missing.

my thoughts exactly.

sorry, i don't have an answer for ya.

Originally posted by Goldenboy@Jan 14 2004, 01:06 AM
1.IACV
2.thermostat
3.the hamster under your hood has a cold

no thermostat because it doesnt have a temp coolant problem. My guess is, IAC, O2, or a major vaccum leak some where. Do this:

Spray cabuerator cleaner in your engine bay at places where you might think there could be a vaccum leak. If your engine races (revs up) then you have a vaccum leak somewhere. If not, look at your IAC or o2 sensors. Any CEL's?

[imported_1blkex]

Nope no CELs. But if I remember correctly the IAC won't throw a code. I got the car on the a scanner the other day and everything is pretty straight. Vac is about 20Hg at idle So I doubt it's a vac problem. I checked it on the O-scope to and everything ignition wise is pretty good . IAC is a good bet, anybody know how to test it?