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Old Feb 22, 2016 | 11:40 AM
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Make it work
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hello; I have a 1997 GMC Z71 tuck that i have gutted and am installing a 2002 2500 HD complete package, motor and trans and wiring inside and out and fuel tank complete. i got it running, got computer flashed and it idle like a kitten but pulls like a fly. My tach is reading about 1100, 1200 at idle and will peg out when shifting gears. My snap on versus is not reading on cylinder 7, 8 saying N/A and has sever codes in it about o2 sensor lean. I put new fuel pump in also. ( is it possible that my computer has been flashed and running with V6 program and that is why my tach is high and not recognizing two cylinder)?
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Old Feb 23, 2016 | 06:22 PM
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76larkman
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Look into Lt1Swap.com for wiring info. If nothing else email him on your situation. Why didn't you make the engine harness standalone?
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