Re: Checking for Vacuum leaks! - Saab 900 Bulletin Board - Saabnet.com
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Pull off the air cleaner head and AMM. Insert a shop vac hose (running on the vac's exhaust/pressure side) and insert it into the intake plumbing where the AMM was. Seal off for any leakage around the hose with duct tape, etc., turn on the vac and pressurize the intake system. Spray all the intake plumbing, intercooler, throttle body, manifold, PVC connections and vacuum connections with soapy water. Any leaks will show up instantly with bubbles except for possible ones in lines going inside the cabin which you can seal off for a test run. Also check your ignition timing.
posted by 99.75.8...
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