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2004 Chevy 6.0 Standalone Harness -crank with fading injector pulse

  • Waderaces427
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3 years 7 months ago #54846 by Waderaces427
I spent about 70hrs trying to figure out the issue and bought the scannerdanner ebook to streamline my efforts. I have good spark with a fading injector pulse as tested with a noid. Spark plugs are bone dry. I swapped batteries,starters, P59 computers, harnesses, sensors cam, crank, ect, and two different set of injectors. I have another vehicle with same setup and everything works installed there but not on my truck. I have grounds from battery to frame, block to frame, body to each head, and harness grounded to cylinder head. Grounds test good with multi tester. I can manually pulse injectors and verified spark. I have 58 psi at the rail. My scanner HPtuners show accurate readings for map,tps, vats disable, cam counts hi/lo, and crankshaft counts. The engine fires for a few seconds on Ether. I have multi tester, HPtuners, test lights for my tool set .

Thank you in advance...

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3 years 7 months ago #54856 by ontheriver
Have you tried it with the MAF disconnected?

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3 years 7 months ago #54857 by Waderaces427
Yes, the tune is speed density;however, I disconnected and connected maf with tune changed. Also, tried cam sensor disconnected. Thanks for reply.

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