LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

no fuel or spark

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Old 10-25-2003, 10:55 AM
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no fuel or spark

A guy brought a car to me. he bought his own parts, opti, waterpump, coil, wires, and plugs. It would not start. I changed all the parts. Im not getting any fuel or spark. Ive done this job plenty of times. I know its nothing I did. I even checked over everything. I stuck another ign. moduel in it. And another PCM. It still wouldnt start. What else could it be. He said he went to crank it one day after sitting a while and it wouldnt start. Please help. It could be the opti harness. But It doesnt even look coroded.
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Old 10-25-2003, 01:41 PM
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This has to be something simple. Im not getting any spark from the coil. Can anyone chime in and help. No fuel or spark. Is there a module os something that will control both of these?
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Old 10-25-2003, 03:12 PM
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If the pcm see no signal from the opti, it won't allow fuel.

You might need to test for pulses .
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