sub 10k miles on new Bosch OE injectors
RaceMe Pro tuned (60hp setting, #3), deleted.
5" FloPro exhaust
For a long time, now, I've been getting a fuel derate under heavy throttle loads (like climbing a 4-5% grade in 5th or 6th) at like 40% or more throttle percentage.
As an example, logging with my XTOOL A30D scanner:
60% throttle
5th gear
about 55mph
loaded or empty, doesn't matter
Fuel pressure requested set point: 21000psi
Fuel pressure Sensor: 15000psi (more throttle decreases this pressure, I've seen it as low as like 8000psi)
HPCR Fuel Pressure: follows fuel pressure sensor
After about 5-8 secs of this gap in requested pressure, the Derate Counter increments by 1, the engine gets flat (100% throttle makes no change) and the overhead console dings "See Dealer". no codes are stored...
Things I've done:
I've updated the tuner's firmware
re-flashed the truck
replaced fuel filters
replaced the Fuel Pressure Sensor
Replaced Fuel Pressure Relief Valve with a Plug
Re-shimmed OE FPRV
Replaced with Bosch new FPRV
Changed to a lesser tune, as well as a higher tune
tried stepping up the rail fuel presser
no change, set back to stock
Last thing, I've ordered a FLEECE 170 lift pump, that will be here tomorrow..
The 'NO CODE' part is a MFer, since that gives me absolutely no direction.
Thoughts? I'm at a loss, and I've been chasing this issue for a very long time.
sub 10k miles on new Bosch OE injectors
RaceMe Pro tuned (60hp setting, #3), deleted.
5" FloPro exhaust
For a long time, now, I've been getting a fuel derate under heavy throttle loads (like climbing a 4-5% grade in 5th or 6th) at like 40% or more throttle percentage.
As an example, logging with my XTOOL A30D scanner:
Fuel pressure requested set point: 21000psi
Fuel pressure Sensor: 15000psi (more throttle decreases this pressure, I've seen it as low as like 8000psi)
HPCR Fuel Pressure: follows fuel pressure sensor
After about 5-8 secs of this gap in requested pressure, the Derate Counter increments by 1, the engine gets flat (100% throttle makes no change) and the overhead console dings "See Dealer".
no codes are stored...
Things I've done:
Last thing, I've ordered a FLEECE 170 lift pump, that will be here tomorrow..
The 'NO CODE' part is a MFer, since that gives me absolutely no direction.
Thoughts? I'm at a loss, and I've been chasing this issue for a very long time.