huge idle problem
 

for a while my car has had a rough idle, then it ran good for two days, now it idles at 2000 or 2500 until warm then it goes from 2000 back to 1000, and so on. I have replaced spark plugs, wires, iac, thermo sensor, and the pvc valve. Can anybody help please, thank you

RE: huge idle problem
 

I think its normal to have a high idle while warming up. Mine also does it.

RE: huge idle problem
 

it is normal...i have a 93 civic ex with 251,200 mi on it and it does the same thing, so I would think that is normal...especially after all that you replaced.

RE: huge idle problem
 

So you're saying that your idle is fluctuating back and forth once the engine is warm?

Initial high idle is normal, but then it should settle back down to about 800 RPMs.

RE: huge idle problem
 

how's your coolant level?

RE: huge idle problem
 

my coolant level is full, it idles like way high when it is cold, like almost 3000rpm, once warm it drops to 2500 but then goes from 2500 to 1000 and back and forth

RE: huge idle problem
 

you probably just have the idle set too high

RE: huge idle problem
 

my idle screw is all the way down, has had high idle for a long time but it is a turbo car, all started two days after I put a skunk 2 pro series intake manifold on.

RE: huge idle problem
 

my 94 cx also does similar to what you described, but once it warms up its fine

RE: huge idle problem
 

oh, you should have said that earlier.

did it come with the IACV or did you swap your stock one onto the manifold?