high to low idle

[samus21]

I tried adjusting my idle with the screw and the one on the throttle body so I idles around 1200. When I put the car in drive it drops low to about 600 to about 700. How can I get my car to idle at about 900 and when I put it in drive it stays relativity close to that. What a leak in the cat cause this?

 

[97gsxIA]

First, before adjusting your BISS screw did you check for boost/vacuum leaks?

Second, before adjusting the BISS screw did you ground the diagnostics pin with a scanner?

Third, have you checked the resistance on you ISC to make sure it's functioning properly?

 

[Purex2c]

Check for proper tension on the throttle cable too.

 

[TR4CTION92]

Make sure your closed throttle sensor (top of throttle body) isn't screwed in too far. That was my proble
. Lot of info on here under "idle surge" and "high idle"

 

[Bo0sTdTsI]

http://www.dsmtuners.com/forums/articles-engine-fuel/191137-how-fix-your-idle-surge-problem.html
Check this just in case..

 

[samus21]

thanks guys. I think its a boost leak I test and go from there.