here is why I think I have a leak.... - Saab Performance Bulletin Board - Saabnet.com
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here is why I think I have a leak....
Posted by Smeter [Email] (more from Smeter) on Tue, 3 Oct 2006 19:31:30
In Reply to: Re: finding intake leaks under boost....., lms, Tue, 3 Oct 2006 10:52:41
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I use to hit 21-22 psi (depending on intake air temp)with my 1995 9000 (with SQR tune)and then it would settle in at 20 psi and hold it to about 6500 rpm. Now, I hit about 20 psi and as the rpm's go up the psi will drop to about 16 psi at 6500 rpm. Initially, I thought the problem might be fuel. So, I put an upgraded high flow pump in from Walbro (the 255 one. No change. Then, I thought it might be ignition. So, I put a new DI in with fresh plugs. Still no change. Still with no improvements, I am thinking now that I have some kind of vacum/pressure leak.... any ideas on this one?
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