02 pontiac Montana 3400 wont start with key but i can turn key forward and jump it off the starter and it starts but wont stay running.

Asked by Nov 17, 2015 at 12:26 PM about the 2002 Pontiac Montana

Question type: Maintenance & Repair

6 Answers

16,790

If you are saying vehicle will not start but if you jump start it will start but soon as you remove the cables it will shut of ? If so you most likely have a bad alternator or battery. Have both tested.

Thank you.. I have got it to start with the key now and the alternator and battery are good they have been checked.. But now it wont stay running once its started. I have checked the fuses the fuel pump and cant figure out why it wont stay running.

16,790

Sounds like you may have a bad ignition switch.

16,790

Does the vehicle stop running after letting key go or does it run after letting key go then shuts off after a minute or so of running ?

after I let the key go it instantly shuts off like its running out of gas, but I know there's gas in it and I just put on a new fuel pump.

16,790

Yeah that sounds like a bad ignition switch.

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