TEXAS HEAT
Well-Known Member
I'm tuned by Lund and yes logs have been sent and reviewed with the codes present and with them cleared. The only obvious condition is the lift pump fuel pressure drop that occurs at wot as the revs climb. My understanding is that this is somewhat normal because the ecm strategy will increase injector pulsewidth to keep afr's in check even as pressure at the lift pump decreases, which explains why my afr's and fuel trims are all good as this is happening. Obviously this isn't ideal because if fuel pressure drops too low then it can't supply the injectors at the increased pulsewidth. When that happens the ecm will start to control torque (power) with the throttle body to keep afr's in check. It will also generate a torque source code that can be seen in a log, but that hasn't happened in my case yet, which is why I don't believe my codes are related to the lift pump pressure issue. P2BEE and P2BEC codes are fuel system too lean A (DI) high pressure side (bank 1 and 2) which isn't showing any issues in the logs. Pressure on the high side is mostly 2900psi and occasionally dips to 2850 throughout the pull which I believe is normal.
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