Thread: No start issue
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Old 02-15-2023, 11:37 AM   #21
mongocanfly
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Join Date: May 2015
Location: Alabama
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Re: No start issue

The harness is a psi.. they have been very involved in helping me with this..
Here are some parts of our emails back and forth
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Har-1015 harness. Even with the cam sensor un plugged it will still start.
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Crank rpm comes from the crank sensor the PCM must see an rpm during cranking, then the cam sensor locates the #1 cyl. to commence the firing. In the event there is no cam signal. The PCM defaults to back up fuel mode and the vehicle still starts. If you have no crank RPM it will not start.
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No crank rpm = no start, cam sensor does not affect the crank rpm.
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I spent several hrs last night cruising ls1tech.. but couldnt narrow down what my issue is..
I'll check that link out and dig some more..
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