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- Joined
- May 1, 2010
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- 1
- Transmission
- Automatic
I have search this and another forum up and down and can't seem to find a solution to my problem.
Vehicle '98 3.0l 5speed, 4x4, no a/c, no cruise.
Problem:
Between shifts the idle stays high sometimes around 3k rpm, when going downhill in the lower gears there is no hold back. Once the vehicle stops it will return to idle after 30 seconds or so.
What has been done so far to correct the problem.... replaced idle air control valve, replaced throttle position sensor, cleaned intake tube, air intake temp sensor, mass air flow sensor. Complete check for vacuum leaks, replaced pcv valve and hose?
The throttle body is clean and does not stick, the throttle cable is lubed and does not stick either. It runs out great, idles smooth with no stumbles or coughs.
If I unplug the IAC it has hold back in lower gears, returns to idle instantly and is a pleasure to drive. I have tried making my own gasket for the IAC using smaller holes, made it idle faster stopped but during up and down shifts it returned to idle as it should.
What have I overlooked? What am I missing? What role does the VSS play in idle control?
Thanks for any and all help, I have close to 20 hours trying to correct this problem.
Vehicle '98 3.0l 5speed, 4x4, no a/c, no cruise.
Problem:
Between shifts the idle stays high sometimes around 3k rpm, when going downhill in the lower gears there is no hold back. Once the vehicle stops it will return to idle after 30 seconds or so.
What has been done so far to correct the problem.... replaced idle air control valve, replaced throttle position sensor, cleaned intake tube, air intake temp sensor, mass air flow sensor. Complete check for vacuum leaks, replaced pcv valve and hose?
The throttle body is clean and does not stick, the throttle cable is lubed and does not stick either. It runs out great, idles smooth with no stumbles or coughs.
If I unplug the IAC it has hold back in lower gears, returns to idle instantly and is a pleasure to drive. I have tried making my own gasket for the IAC using smaller holes, made it idle faster stopped but during up and down shifts it returned to idle as it should.
What have I overlooked? What am I missing? What role does the VSS play in idle control?
Thanks for any and all help, I have close to 20 hours trying to correct this problem.
