Question about 2001 Oldsmobile Bravada
Too much air is entering the inlet manifold making the air/fuel mix too lean to ignite. Can you hear any suspect whistling or hissing from any of the pipes etc whilst the engine is turning over. Check every junction in the air ducting from the air filter box though to the throttle intake. There should be no disconnected pipes or holes. Likewise all the pipes and tubes that connect with the inlet manifold should have secure junctions, the pipes should be free of splits etc and the other ends of these pipes should also be secure to the devices to which they are attached. Be diligent in checking every bit. Two approaches that might make the leak detection quicker: 1) Disconnect the vacuum tubes (those that make connection to the inlet manifold) one at a time and in turn to block the now open pipe to the inlet manifold with your finger. Do this to each tube in turn whilst trying to start the engine, eventually you will find the faulty tube because the engine will start. 2) Spray your brake cleaner on the outside of the tubes one at a time. Eventually you will find the site of the leak as the car will surge in revs as it it sucks in the brake cleaner and ignites it. Finally check around the injector seats and also where the inlet manifold makes union with the cylinder head
Posted on Sep 02, 2010
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Posted on Jan 02, 2017
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