Helping a buddy with his 2007 N54. Logs were showing hpfp crapped out and codes corroborated it. So, a few hours later a new pump was swapped in. Valve cover also replaced same day. Primed the pump, test drove it and no issues.
High five.
Gassing it on the way back from the test drive car stutters a bit, and gave it a bit more gas to get it to misfire so we could check what cylinder. Flip car off and won't turn over. Start logging and rail pressure at 80 psi. Think the pump must be a dud and apparently my buddy recognized some other codes and another mosfet burnt.
New pump arrives, installed, mosfets replaced, swapped hpfp rail sensor, reset adaptations via mhd only.
Fuel trims max negative
AFR's peg at 10.xx
Rail pressure drops from 6-700 to 100 psi
Code present is 29f1
Plumes of exhaust smoke after a minute
Any guesses?
Car is 91 octane RB turbo basic bolt ons etc.
High five.
Gassing it on the way back from the test drive car stutters a bit, and gave it a bit more gas to get it to misfire so we could check what cylinder. Flip car off and won't turn over. Start logging and rail pressure at 80 psi. Think the pump must be a dud and apparently my buddy recognized some other codes and another mosfet burnt.
New pump arrives, installed, mosfets replaced, swapped hpfp rail sensor, reset adaptations via mhd only.
Fuel trims max negative
AFR's peg at 10.xx
Rail pressure drops from 6-700 to 100 psi
Code present is 29f1
Plumes of exhaust smoke after a minute
Any guesses?
Car is 91 octane RB turbo basic bolt ons etc.