Question about 1997 Pontiac Grand Prix

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1997 Grand Prix GT.new3800 and fuel pump, spark and gas, nofire!

My 1997 Grand Prix Gt, has a new 3800 motor installed...its getting gas and its getting spark, but it wont start! trying to figure what it could be and I am baffled. help?

thanks.

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  • foxracer_991 Sep 24, 2009

    is there such a thing as a Safety Relay somewhere?...all the fuses are good.

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Hello! When you swapped the engine, did you have the PCM (Powertrain Control Module) from the new motor as well? If not - you will need to have a "CASE" learn run on the PCM that you're currently using (the one from your previous engine). Important note: the 1997 Grand Prix GT's and GTP's have quite a few differences from the 98-03's. The CASE procedure is run using the Tech II tool and can be done at any dealership in about 10 minutes. If they aren't sure what that is, suggest to them that they follow the procedure for DTC 1336 - Crankshaft Position (CKP) System Variation Not Learned. :)


Hope this helps and good luck!

Posted on Sep 24, 2009

  • Shannon Washam
    Shannon Washam Sep 25, 2009

    There is the Anti Theft Module - which "could" be the problem in theory. But I'd bet it's the PCM in need of a CASE learn. I've built/swapped dozens of L67/L36 motors and this is a pretty common occurrence, and something I do everytime I have to swap out a motor.



    Hope this helps - let us know if you need anything further!

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I have had injectors stick with old gas - used engine - if a little gas is poured into butterfly and engine starts the injectors or fuel rail is problem - needs about 40 psi fuel press. - otherwise are plug wires correct and are all plugs clean?

Posted on Sep 24, 2009

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