98z28bitcha

iTrader: (22)

sup guys,Well i hit 100,000 miles and having a idle problem. It would set at 7-800 rpms and jump up to 1,000 then back down. I am saying it is vacuum leak for sure but dont were. I replace the iac already so u count that out.

Thanks for the help.

keliente

iTrader: (22)

Have you cleaned the throttle body recently?

Grimes

iTrader: (3)

is your MAF dirty?

98z28bitcha

iTrader: (22)

I have clean both maf and throttle body.

98z28bitcha

iTrader: (22)

b u m p

staringback05

iTrader: (8)

tps sensor

98z28bitcha

iTrader: (22)

I have replace that also. My friend gave me his tuner to check every thing wat should I look for?

im2fast4u98z28

iTrader: (1)

i'm having the same problem with mine. do you still have egr?

im2fast4u98z28

iTrader: (1)

i took the egr pipe out of the intake and cut it. the pipe o-ring isn't that simple to seat. i'm almost positive that mine is leaking there. you might as well try it. it's only like a buck.

98z28bitcha

iTrader: (22)

I remove it put a plug in place but, that was a while ago. It started week ago i think it is intake leak or a map senor.

im2fast4u98z28

iTrader: (1)

i'm not sure if the map sensor would cause that though???

98z28bitcha

iTrader: (22)

The map senor located on the back of the intake manifold right? I will take the manifold off this weekend check for leaks and cracks.

im2fast4u98z28

iTrader: (1)

yea it's in the back. good luck

98z28bitcha

iTrader: (22)

thanks i am goin to need it. I well let know what it is.

hpjunky98

iTrader: (3)

Check the rear line going from the drivers side valve cover to the PCV valve, behind the intake. Mine was completely corroded off at both ends. Also check that the line going to the TB isn't cracked or overly worn. Also i see you have a 98. I would check the EGR seal going into the intake. Thats a very likely culprit. Good luck!!! I know first hand how much of a bitch it is to track down a vacuum leak.

98z28bitcha

iTrader: (22)

thanks for the help i am goin to get breathers for the pcv system just get rid of it.

hpjunky98

iTrader: (3)

cool just make sure you block off everything so you don't make the issue worse.

98z28bitcha

iTrader: (22)

Looks like I have a project this weekend i cant wait to start workin on it.lol

98z28bitcha

iTrader: (22)

What the fu*k! I found the problem the idle srew was high. So i adjust lower now it idle fine now.

fuseone

what idle screw?