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I have a 1998 Chevy K1500 with a 5.7L Vortec.

I have a 1998 Chevy K1500 with a 5.7L Vortec. If I let the truck run for 6-10 minutes with the A/C on the truck will die and not start back up until it has cooled down, say 20-25 minutes. I tested fuel pressure and it is fine. I replaced the ignition coil, ignition control module, and camshaft positioning sensor. Reason for replacing the cam sensor was after replacing the first two my truck finally had a trouble code, which was a cam sensor. It acts no different than it did before after replacing all these parts. Any insight would be greatly appreciated

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With DTCs, or "trouble codes" a common perception is that they always point to a faulty component (part). Not necessarily so; they are really indicating only that the voltage on that electrical circuit is "too high" or "too low". Have the electrical circuit for the cam sensor checked back to the computer for open, shorted or grounded wiring. You should also scope the square-wave pattern of the cam sensor if necessary and compare it with known good examples in a repair database.

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Jim O’Neill – Chino Autotech Inc., Auto Club SoCal AAR

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