Strange surge

[dceptn]

I'm trying to iron out some bugs, I took the car out for the first real drive to grab a log for the Mafcomp Adjust, the idle is pretty good now but when I put the car in park it starts reving up to 2500 then cuts out and drops back down, as soon as I shift into drive idle is perfect at around 950. This only happens after driving for about 5-10 minutes. Help?

 

[9!'clipseDOHC]

I'm not even going to look at your log until you do a boost leak test. The vast majority of idle surging issues involve boost leaks (usually in or around the throttle body), dirty throttle bodies, and or bad ISC's. Check for boost leaks first and then report back.

http://www.vfaq.com/mods/wayback/BradBauer/engine/surge.html
http://www.dsm.org/how-tos/tttt/tttt3.html

And here is a handy video which shows you how to test your ISC motor for proper operation.

http://www.youtube.com/watch?v=l7R3gf7SiAo

 

[sikevo9]

This sounds like a definite boost leak. every dsm will get a boost leak or 10 in its lifetime.

IC Pipe Tester

 

[dceptn]

As soon as I have my boost leak tester back i'll post results, almost sounds like a bad ISC from reading those links.