Question about 2000 Pontiac Bonneville
Just replaced fuel pump and coolant temp sensor
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Posted on Jan 02, 2017
the code you have is for a misfire on #3 cylinder. (im sure you knew this right?). the crankshaft position sensor will not cause one individual cylinder to misfire. what i typicaly do in this scenario is switch the ignition wire off of the guilty cylinder onto a known good firing cylinder and see if misfire moves to the other cylinder. i repeat this process by switching the spark plug and finaly the fuel injector. a compression check may be in order as well (but not a likely cause) unless you have access to a tech 2 (gms diag computer) you will need to clear this code after each component is moved and see if you get a new code ie :p0304 if switched to #4 cylinder..other wise if you do have access to a computer that has a misfire chart in its features you can quickly identify the guilty component. as i side note the ignition coil may also be faulty, but i believe your vehicle has a 3.8liter meaning that it has a coil pack....switch the others i listed and see ow you make out....good luck!
Posted on Jun 11, 2009
Why would you replace the fuel pump and filter for a compression problem. You either have a bad cylinder head, or a bad motor. Those are the only 2 things that will give you low compression. If you are talking about the engine revving up while driving down the road, you have a transmission problem.
Posted on Jul 29, 2009
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