2003 Pontiac Grand Prix 3800 V6. Dear JK: The car will turn over, run for a couple of seconds and then shuts off. After about the 10th try it ran fine. My son says it has been difficult to start for a week or two.
JK: Hello and welcome,. This could be 1 of several problems. You could have a fuel pressure problem(bad fuel pump, plugged filter), Leaking fuel pressure regulator causing a rich condition- which would stumble and chug before it dies, or you could have a theft system problem. If after it starts and stall, leave key on and see if the security/theft light stays on or flashes-that would indicate a theft problem. While it is acting up, will need to check these things in order to find out what is the next step. Let me know what you find.
Problem with my 2001Pontiac Grand Am 2.4 L GM Computer codes = no Changed spark plugs Work done to repair this problem = changed spark plugs GM tech = JK question = The car intermittently misses under normal driving conditions every once in a while. Changing the spark plugs makes it go away but a day or so later it comes back.
JK: If changing the plugs helps, i would look closely at the plugs that were removed. Make sure they all seem the same color. If one is oil fouled, or looks a little greenish or orange (depending on which coolant is in the system at this time) this would indicate an internal engine problem. If one is totally black, this would indicate a rich fuel condition which may be caused by a faulty injector or is more than one is black, then i would suspect a leaking fuel pressure regulator. MORE...
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