You have the car scanned for the fault codes. Find an OBDi code scanner, or have a mechanic look it over. You can also try it yourself if you handy....https://www.youtube.com/watch?v=UIKdbTFvyUU
How is it running currently? 307 Olds engine? Agree with Tom on pulling the fault code. Just let us know how its running currently maybe we can help.
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