Mechanics

MY SOMETIMES WON'T START?

2002 Pontiac Montana • 140,000 miles

I have spark and fuel in the fuel rail. Have changed plugs and wires, fuel filter and starter. Weather does not seem to be a factor. Once the engine is running it runs great. My mechanic says he does not know what it is, he said we would have to start changing sensor. Do you have any ideas?
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Jemfranks
March 28, 2012.




If there is a short would if effect all six plugs. Or I'm I looking at a pcm problem. And what do I have to do to fix it. It's frustrating ever time I go to start the van not knowing if it's going to start. So I have not traveled to far from home. Where I live we have no public transportation.
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Tiny
Jemfranks
Mar 30, 2012.
If I do find out that the pcm is the problem can I replace it with the one for my 2000 montana without having to program it? Whats the chances I have a broken wire? Would any sensor's cause the same problem? In my book it's said that if a sensor fails the pcm would go back to the last readings and use that to run the engine is this true?

Tiny
Jemfranks
Mar 30, 2012.
Quick question: condition of car keys? I have a 1999 Montana - trouble starting sometimes. My key has some corrosion up in the shaft where the electronic chip is (inside the rubber/plastic head of the key). Since having a new key made ($55 or so at the hardware store) - no more problems.

Tiny
Just_a_thought
Apr 24, 2012.

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