Tried both methods and could not get idle down and car running smooth and starting. Best I could get was 1200 idle and then it was starting a bit hard when warm. When I idled it down to 800 [engine at oper temp] it was a very rough and loping idle, varying by 150-200 rpms and sometimes quitting. If I revved it up to say 2500 and let off it would stay at 1200-1400 for 30-60 seconds before going down to the 800 range.

Although installed a new Idle Control Module [ICM] in February as old one tested bad, [and a new Idle control slide Valve- [ICV] after that], after many hours went back and diagnosed the ICM again and appears got a bad one. The test for battery voltage with key on engine off at the ICV plug in is zero.

The test of jumpering the proper plugs on the ICM plug in to check for ICV operation [audible click] is successful.

The wire check for continuity from the ICM plug to the ICV plug is good.

So am getting a warranty replacement on the ICM and will let you know how it turns out.

Frustrating problem after the rebuild.

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dloveless

1984 500 SEL [131K]-
1991 GMC Sierra 4X4 XC [162K]- War Pony.
2004 Jeep Liberty Limited [8k]- wife's sled- Belle.