RngTrtl

Greetings all,

After a wonderful drive back to ATL from DFW where I bought the car I got a CEL for a P-0507 (high idle) and it is usually a stuck throttle plate or a vacuum leak somewhere. The car is idling high (about 1000-1100 rpms). I cleaned the MAF with MAF cleaner just in case. I am good with a wrench but am new to this car (I had a n/a 996 for several years). I want to go out there and check all vacuum connections and remove the intake y-pipe at the throttle body and also check the turbo air hoses. I found a vacuum diagram i think.

http://goo.gl/W86YSD

Any one have any advice on this? Also I could not find a write up for removing the intake y-pipe after searching. If anyone has any pointers on this it would help alot. Thanks!!!

rmc1148

http://www.6speedonline.com/forums/9...ody-reset.html You could try this.

RngTrtl

Hmm. As simple as it is, ill go do it now and report back ina bit.

EDIT: I went through the reset procedure and heard it resetting, drove it around for a bit (motor was still 1/2 warm from previous drive), and same idle at stop. About 1000-1100.

James88

Had this happen to me just 2 weeks ago, I had a vacuum leak. All good now.

z06801

Where was the leak found?

32krazy!

smoke test the vacuum system. you can use incense for this

James88

Vacuum hose under manifold. Had the hose replaced, It also fixed the annoying hesitation under light acceleration that I had for the past 12 months.

z06801

Nice work I need to track down mine, I have the same issue.

RngTrtl

I will try this as well. the weather is supposed to warm up next weekend and I will try and find it then. Hopefully some others can chime in with some more advice before then.

32krazy!

you have to unbolt the airbox and rotate the airbox 120* to the drivers side. to remove. once its out of the way you can see the clops holding the y pipe and the bolts to remove. theres one clamp at the throttle body . lots of vacuum lines and seals around to check. after that do a full boost pressure test when it all back together. testing from the turbos yield the best results

rmc1148

Did you try the TB reset? Just curious.

RngTrtl

Yup. same results

RngTrtl

Thanks alot for the help. I will dig into it this weekend when it is a bit warmer and report back.

rmc1148

Oh well it was a free and easy try, the vac leak hopefully will be easy to find.

RngTrtl

I found the vacuum leak! After I got all the intake off except for the throttle body. I had to do some serious hunting and found it after about an hour. The mount for the "Electric switch−over valve for secondary air" on the drivers side broke and when it let go it pulled out of the vacuum line leaving out of check valve #22. After much effort I was able to dig around and get the hard vacuum line out and I reran the line with some material from Autozone. All is well now and she idles like a champ. Now I need to drive the car for a bit and reset the evap ready and the secondary air ready so I can get her registered. Thanks to all for the help!!!

Diagram below for vacuum routing