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Date: Fri, 04 Oct 2002 06:26:48 -0400
From: KeithG <noonenopsamspring.com>
Subject: Re: Half boost pressure


Also, since it is a CSE with Trionic control, I would arrange the issues as: Plugs torn/deteriorated intake boot Wastegate set too low BPC Valve not connected or wiring BPC Valve malfunction - bad (trionic has no plug leads, cap, rotor) KeithG Grunff wrote: > Craig wrote: > >> I have '94 CSE and am have been having some low boost pressure. I had >> it measured on a calibrated boost gauage and it measured peak at 7psi >> and maintained at 6psi. Now I know this is only about half what I >> should be getting. So the question now, is where do I start searching >> to figure out where half my boost is going. Could it be a wastegate >> problem, valve problem ECU problems? > > > You don't say whether this has happened recently or has always been the > case. Provided no one's messed around with the ECU or the wastegate, IME > most low-boost problems are caused by (in order of importance): > > 1. Vacuum leaks > 2. Vacuum leaks > 3. Vacuum leaks (have I made my point?) > 4. Bad/wrong/incorrectly gapped plugs > 5. Bad ignition leads > 6. Old air filter > . > . > . > 56. Wastegate stuck > . > . > . > . > 734. Bad ECU > > So give the car a good service (plugs, leads, filter, etc.), make sure > there are *no* leaks (check for leaks by blowing butane or propane from > an unlit torch at each connection, with the engine running. If there's > the slightest leak, the revvs will go up. Be careful.), then measure the > boost again. > > Good luck, > > -- > Grunff >

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