what are possible reasons for rough idle

[tsieagletalon]

what are possible reasons for rough idle

 

[95'clipseRS]

It sorta depends on whether the idle surges or is low/high. Like what anyone else will say, search the forums. Here is a quick answer: check you ISC. Mine has an idle surge, and the problem with the idle is the ISC (Idle Speed Controller). Do a quick search on these forums for help. Hope you get that problem fixed

 

[schoffs4]

Do a compression test

 

[viprez586]

Boost leak test.

 

[tsieagletalon]

how do i perform a boost leak test ?

 

[speedy13]

read these two links. First one explains comon idle surge problems with dsms. second one tells you how to make a boost leak tester and check for boost leaks.

http://www.dsm.org/how-tos/tttt/tttt3.html

http://www.vfaq.com/mods/ICtester.html