Hey guys iv desided i cant afford to go carb atm so i was wondering if anyone could help me find out why my crossfire injection keeps stalling at stop lights after driving it for a few mins.. it does it in maby 5 min intervals or just when i stop andf go alot.. it doesnt do it on the high way tho it does sputter a little tiny bit on the highway here and there but no stalling. and when it stals i have to hold it Wide open throttle to get it started again, otherwise it jsut cranks. anyone have any ideads? anything would help thanks.

 

Sounds like you have a vacuum leak.

 

Sounds like the trottle shaft bushings are worn. They create a vacuum leak when worn which creates stumble at idle and some driveability problems. Do a google search for "crossfire injection". There is a guy that re-bushes throttle bodies for around $70.

 

Leaking throttle shaft bushings could very well be the vacuum leak you need to fix. I'd make sure it isn't something simple like a vacuum hose off. If you do decide to re-bush the throttle bodies, replace all the vacuum lines you can or at least the ones that are cracked and weathered.

 

Yeah could be a vacuum leak , like-too much air . But it could also have not enough air , like a clogged IAC ...

 

As everyone stated above I'd start with simple and replace all the vacuum hoses.CFI motors do not react well to a vacuum leak.Also check the top plate bolts that they are tight(as well as the TBI bolts).

Have you done a complete tuneup on her(to include a fuel filter)?And i would check the fuel pressure.GM has 10-12psi in the service manual but that is barely adequate.They perform better with 12 psi +(the site below gives instructions how to check adjust).

And as golden suggested check that both IAC motors are working properly.They can/will cause poor idle.

The throttle bushings are a problem as GM just installed the shafts in the main body and didn't uses bushings.The people you want to check are
http://www.crossfireinjection.net Tom and Jim are good people that do excellent work.They are also members of the Crossfire Forum which is an excellent source of info( http://www.crossfire.homeip.net )