996 odd idle issue

[01slvr996]

Has anyone had an issue where once the car is warm, and you come to a stoplight; the idle will drop by 50-100 rpm for a few seconds then bounce back to normal. and repeat this cycle every 15 seconds or so? I have no lights, or error codes. I have a durametric and everything shows up fine. Car has 100k miles, new plugs, plug tubes, air filter and had an alternator and water pump 40k ago. I checked the MAF at the throttle body and all seems normal... just wondering where else I should maybe be looking.

[Loren]

I would remove the throttle body and clean it thoroughly.

You just can not get behind the throttle buttery with a spray can from the front.

Also use electrical contact cleaner on the electrical sensor connections.

I think the eGas cars are even more sensitive to a dirty throttle body than older cable driven version.

[01slvr996]

Thanks Loren, I'll give that a try.

[Ahsai]

Same behavior with or w/o the A/C ON?

[01slvr996]

same on or off.