Having an idle issue with my SC. Occasionally, once warmed up, the idle will drop very low (It's an AOD) and start to idle/run very rough, almost like it is running too rich. If I stay idling long for more than a few minutes in this condition, the "Check engine" light will come on. If I shut down the engine and restart it, the idle returns to normal.
Also, when I stop and take it out of gear, the engine idle will climb to 1500 or so, then drop to almost stalling, then back up, and so forth, almost like there is a vacuum leak. It seems only to do this when warmed up, and when it is in gear, I do not notice it happening.
So, I've clean the gunk out of the Idle bypass valve, and checked for vacuum leaks. All the vac lines are tight & new, and it seems to only happen when warm.
What's next? New idle air bypass valve? I have the factory shop manuals, and a quick look through didn't tell me if the Idle air bypass valve is the same as the "IAC" that seems to be giving a lot of people fits. If not, where is the IAC located?
Also, when I stop and take it out of gear, the engine idle will climb to 1500 or so, then drop to almost stalling, then back up, and so forth, almost like there is a vacuum leak. It seems only to do this when warmed up, and when it is in gear, I do not notice it happening.
So, I've clean the gunk out of the Idle bypass valve, and checked for vacuum leaks. All the vac lines are tight & new, and it seems to only happen when warm.
What's next? New idle air bypass valve? I have the factory shop manuals, and a quick look through didn't tell me if the Idle air bypass valve is the same as the "IAC" that seems to be giving a lot of people fits. If not, where is the IAC located?