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hard starting

bigdog907bigdog907 Member Posts: 1

I have a 2001 gmc 5.3 that has starting problems. Had it scanned and it showed both banks on the lean side. I checked the fuel pressure , ok. Was told mass air flow sensor was bad. when unplugged would start ok most of the time. So, I replace it. Seemed to solve the problem but after a few starts and stops, we are back to square one. Also I notice my back up lights were not working. I have no power to the fuse. Don't know if these two problems are connected. The truck has 160,000 on it.

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