grand am gt 3400, no start intake/exhaust backfire

[caffeine]

Personally I don't think so but you've already apparently ruled out all of the relevant ignition components.

[tubov6cav]

Yes and I'm almost 100% sure that it is in time..


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[Superdave]

It cant really go out of time.

If the cps measures 980 ohms, all the ignition components are good and the plugs are known good then it should fire off assuming the wires are on right.

[tubov6cav]

What controls fuel timing?


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[caffeine]

What ECM are you using?

[tubov6cav]

2001 grand am


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[caffeine]

So the PCM will control fueling based on the cam/crank sensor inputs

[tubov6cav]

Got any idea what the test is for the 24x and the cam sensor?


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[Superdave]

talking through PM's I had a random thought... any of you OBD2 guru's think VATS could be the problem here?

[caffeine]

Vats usually allows the engine to run for 2 or 3 seconds before shutting off the injectors.

[tubov6cav]

My theft system light went off after I ran the procedure..


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[tubov6cav]

And here is a picture after I did my intake manifold gaskets let me know if you see anything abnormal.


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[3400-95-Modified]

The rusty destroyed coolant tower... LOL that's all you can really see with this photo.

Did you get the injector wires confused? If so the injectors wouldn't be firing in the right order.

[tubov6cav]

Is the injectors/ harness on a 99 the same as a 2001?


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[Superdave]

If you happened to mix up the pushrods it would be pretty mad but since it passed a compression test it seems unlikely...


99 would have Multec 1 injectors vs Multec 2 on a 2001 so a different connector, otherwise no.