1g dsm still idle surging!!!

[darkstar5456]

ok i have been dealing with this idle surge on my 91 laser rs n/t 5 speed love her to death but i still have yet to track it down yet. k lets start off form the start when i bought the car it would only idle surge when it was cold started. but would stop when it warmed up. and that was ok didnt like it but could live with it then afther awhile it started doing. it once in a while. off and on now it is doing it all the time no matter what temp time or day i start her she starts surging. here is a list of what i have tryed so no one gets confused.
1.block off egr vavle nothing
2.brand new tps that costed $178.99
3.did a vac test with cleaner didnt find anthing.
4.bought new used n/t injectors and new o-rings havent tryed them as they are not here but worth a shot.
5.new tb body gasket also cleaned the tb body its self
6.intake manifold gakset. still have to put on
7.exhasut manifold gasket still have to put on
8.going to try and buy all new vac hoses not sure on what they would run me any idea?
well that is the list of what i have tryed and going to be putting in so if any ones has any clue or ideas please. reply or pm me thanks

 

[BrokenTsi]

Have you tried to adjust the idle screw? Sometimes if its set too high, it will surge.

 

[darkstar5456]

that to have a new biss screw and oring and still nothing. just got her running agian.afther install of the new tb body gasket.it sounds and smells like she is running rich.also when i tap the throttle the rpm stay there if a sec before returning to idle surge. if that helps at all

 

[BrokenTsi]

try adjusting the TPS. You should also check the TPS with a voltmeter and check the voltage with the throttle closed and fully open. Search around for the proper way to do it. Have you tried to replace the IAC valve?

 

[dsmdeliveryboy]

You check your MAS?

 

[darkstar5456]

try adjusting the TPS. You should also check the TPS with a voltmeter and check the voltage with the throttle closed and fully open. Search around for the proper way to do it. Have you tried to replace the IAC valve?

no i havent i dont know how to adjusting the tps. also how do you check the iac vavle

You check your MAS?

how do your check it then by chance thanks.

 

[BrokenTsi]

Visual Frequently Answered Questions - Home Page

Take a look in the "intake" link, and there is an article on how to test all of those items.


And yeah, good point, check your MAF while you're at it.

 

[XiKeiyaZI]

Question

With the EGR Delete.. did you remove the un-needed vaccum lines? >>

I've heard of the EGR causing surge, however... if you leave the lines that run to the EGR unplugged or removed, it could potentially cause surge.