Question about 2001 Oldsmobile Bravada

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I took my 2001 olds bravada to advance auto to have a service engine light checked they checked it and told me it was a secondary air intake malfunction code then they erased the code after that my car wouldn't start. you can hear the fuel pump working and if you spray break cleaner into the air intake it runs briefly and dies

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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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Feb 21, 2011 | Oldsmobile Bravada Cars & Trucks

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I took my 2001 olds bravada to advance auto to have a service engine light checked they checked it and told me it was a secondary air intake malfunction code then they erased the code after that my car...

Well, the secondary air intake malfunction has to do with the air pump I read. Water can get into the air pump in some models and the pump would have to be replaced. However, I have heard that some OEM pumps have a short hose that accumulates water sometimes, causing a recurring problem.

Also, there is sometimes a 20 or 30 Amps fuse that controls the pump.

However, I think, that even though they cleared the code at Advance Auto Parts, and it wouldn't start, that the no start condition is not related to the air pump problem, since the air pump problem is more of an emission control to reduce pollution and doesn't feed directly into the combusiton chamber.

I think that you should check the fuel injectors to make sure that they are working. They should click when under pressure with fuel, and allow fuel to enter the combustion chamber.

Maybe check the fuse for the FI or fuel injectors.

It seems like your vehicle is getting spark since it runs briefly when you spray brake cleaner into the air intake.

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Expensive. Depending on whether it's just the air pump (usually) or solenoid valves, couple to several hundred bucks. Others can fix this, but need salvage or ebay parts.

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If your not comfortable with the cleaning, just find the MAF part on-line...about $200 bucks for a new one from Bosch. Very easy to do it yourself and a common failure point on the Audi.
For those still having the coolant sensor problem, also easy to replace yourself....about $10 bucks with a new o-ring.
Like GURU said, a code reader tool will tell if you have these problems, after the engine light comes on.

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