Hi, been running this truck for 150000 miles with same tune, replaced injection pump and installed a pusher pump and now keep getting p0101. i rescaled maf and still happens. seems mainly happen when it sits and idles. any help would be appreciated thanks
most likely an air leak somewhere in fuel system or bad return valve. Kinked or collapsed fuel lines will also throw the "low rail pressure" code
2006 LBZ Duramax
5" Magnaflow turbo-back
EGR blocked
HP Tuned by yours truly
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