"Bouncing" RPM's

[Bala]

Originally Posted by thstone

Here is how my last few days went:

After the hunting idle started, the next day I had big billows of smoke occasionally come out the exhaust so I replaced the AOS. Car ran great and idle was back to rock steady. Thought all was fine.

Then the next day, the car died once when idling and would not re-start - crank over, almost catch and then die. Disconnected MAF and the engine started up fine. Replaced MAF and now back to normal, idle rock steady.

Did you test run the car with the old MAF disconnected? Was there a difference in idle or performance?

[thstone]

Originally Posted by Bala

Did you test run the car with the old MAF disconnected? Was there a difference in idle or performance?

Yes. When the car wouldn't start, I disconnected the MAF and then the car started and ran - thus confirming that the MAF was the problem.

I didn't drive the car to any extent to determine if there was any performance difference with/without the MAF, just enough to convince myself that the MAF was faulty (like 50 feet and back).

[jamesone11]

Hi guys, I too have the unstable idle and the MAF operates correctly (even cleaned for better performance). I'd like to clean the idle control valve but my car is the 2002 986 with electronic idle control valve. So before I go spraying electronic parts cleaner into the valve I'd like to know 1) is it safe to just go spraying into the part, and 2) is there a recommended process/posting somewhere detailing how to perform this process safely?

Thanks for any insight, JM Atlanta