Rough Idle after Warm-up?

PhiDelt109

MkIII Hobbyist
Jun 2, 2005
36
0
0
Kansas City, MO
My car will not Idle after it warms-up. Car idles very smooth until operating temp is reached.

No Codes
Reset ECU, returns
Calibrated TPS
Cleaned ISC 2 times, clicks good
Timing good
No boost-leaks
Vacuum lines checked

This happened to me 1 time last week @ one stop-light, now it’s constant.

Any Ideas?
 

noredline

Yeah, I'd stands on that.
Sep 26, 2006
94
0
0
41
Chandler, AZ
PhiDelt109 said:
My car will not Idle after it warms-up. Car idles very smooth until operating temp is reached.

No Codes
Reset ECU, returns
Calibrated TPS
Cleaned ISC 2 times, clicks good
Timing good
No boost-leaks
Vacuum lines checked

This happened to me 1 time last week @ one stop-light, now it’s constant.

Any Ideas?

Before it dies does that car "buck" at all or does it just die, also if you notice it about to die can you revive it by hitting the gas...if so I would still lean towards vacuum leak....im sure there will be much smarter people on in a moment that can follow up with my response.
 

jdub

Official SM Expert: Motor Oil, Lubricants & Fil
SM Expert
Feb 10, 2006
10,730
1
38
Valley of the Sun
Check the rubber lines from the ISC to hard pipe to accordion hose.

Check your plug wires and test the coil packs per the TRSM.

Specifically, what plugs and what wires are you using?
 

PhiDelt109

MkIII Hobbyist
Jun 2, 2005
36
0
0
Kansas City, MO
noredline said:
Before it dies does that car "buck" at all or does it just die, also if you notice it about to die can you revive it by hitting the gas...
Yes the car bucks before it dies, and yes throttle will save it.

I have NGK plug and wires, both fairly new. Checked the ISC. I will test the coil packs, never have before.

Your not going to believe this but I swapped in my other AFM and it idles now. Still seems like it's missing just a little bit and fluctuating speed but that may be from reseting the ECU again.