CNE Posted May 22, 2007 Report Share Posted May 22, 2007 Have you tried new intake gaskets? They are bad for leaking causing a vacuum leak. This can be identified by spraying carb cleaner around the base of the manifold while running when cold. If the miss goes away, it's a leak. More likely the gaskets than the intake. Quote Link to comment Share on other sites More sharing options...
brobradh77 Posted May 22, 2007 Author Report Share Posted May 22, 2007 Have you tried new intake gaskets? They are bad for leaking causing a vacuum leak. This can be identified by spraying carb cleaner around the base of the manifold while running when cold. If the miss goes away, it's a leak. More likely the gaskets than the intake. I tried that and its really a PITA to get it sprayed good before it starts it will take me a few days to spray every where before it fires up and Zippy said that the Intake Manifolds on 05-06 has been prone to warping so gaskets won't fix that. I am getting another manifold and will order a new gasket from Zippy. Quote Link to comment Share on other sites More sharing options...
rivierakid55 Posted May 22, 2007 Report Share Posted May 22, 2007 at my buddies shop he uses this tool called a vacutech hich is basically a smoke machine that forces smoke in through the pcv and is great for finding intake leaks. Quote Link to comment Share on other sites More sharing options...
CNE Posted May 22, 2007 Report Share Posted May 22, 2007 I ain't knocking Zippy, 'cause he seems pretty dang smart and has been around for awhile, but I work at the dealer and have never seen an intake replaced on one of these trucks, but I have probably replaced 30 sets of gaskets. Usually it is the 5.3 Z VIN that has the vacuum leaks though. It may be the intake, but I would try gaskets first. It won't take 30-45 minutes to put them on. Quote Link to comment Share on other sites More sharing options...
brobradh77 Posted May 23, 2007 Author Report Share Posted May 23, 2007 At this point I am not going to rule anything out so i am going to change out both Intake and gaskets then if that doesn't work upgrade my injectors. Quote Link to comment Share on other sites More sharing options...
oscareltemblo Posted May 23, 2007 Report Share Posted May 23, 2007 I have an ls1 intake. 50 plus shipping dosent have fuel rail or injectors Quote Link to comment Share on other sites More sharing options...
brobradh77 Posted May 23, 2007 Author Report Share Posted May 23, 2007 I have an intake on the way thanks Allballz57 and Frank for your help now I just need to call Zippy for sor gaskets. Quote Link to comment Share on other sites More sharing options...
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