I have a 2005 Pontiac grand prix it was running fine than I shut the car off and now it will not start it sounds like its not firing. Could it be the coil pack?
Could be coil pack,but IMO,pontiacs this year have a issue with the ECM/computer.Have the car checked for fire,and fuel,it may not be a firing issue may be fuel pump is bad,
Can the car be put on a computer to see for sure what is wrong with it?
If the engine light is on there is code,s that can be pulled to tell you the issue,
I drove fine shut it off than about 30 minutes later went to start it to go to work and its not firing but the engine light is not on.
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