I got a P0506 Idle Air code on my wife's '99 NA V70 this morning. I had noticed a problem with the engine returning to idle when I let off the gas or braked to stop. It would drop down below 500 RPM and even stall sometimes. It seems to idle normally other times. What's my first step? TIA.

Since the V70 is a FWD car, you will get more and better responses by posting your question in
the FWD/AWD forum instead of the RWD forum. We don't know too much about them newfangled 'uns without carburetors!
(Actually I know a little because in addition to a 164, a 145E and 2 220 wagons I also have a V70T5 and a S60T5).
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George Downs, Bartlesville, Heart of the USA!

My pardons to you RWD guys. I signed on the wrong site. I've been an FWD/AWD member of Brickboard for some years now and do know the difference. My folks had a '64 Amazon and a '70 145. I believe the '64 was 1800ccs with 105hp.

I'll get back to my side of center now. Thanks for the welcome and help.

Howdy David,

Welcome to the Brickboard. You may find this place habit forming. ;-)

In the future, use the model and year drop down boxes to send your post to the proper forum. Some people ignore posts that are not directed to the model and year in question.


What's my first step?

At warm idle, turn on the AC. Does the idle remain steady? If so, the IAC is working. If it stumbles and recovers, the IAC is sluggish, or possible vacuum leak. If it stumbles and dies, the IAC is not working at all, or large vacuum leak.

Check for vacuum leaks.

http://www.obd-codes.com/p0506

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Mr. Shannon DeWolfe -- I've taken to using mister because my name misleads folks on the WWW. I am a 53 year old fat man. ;-)