Mighty whitey
New member
- Joined
- Jan 8, 2013
- Messages
- 10
Ok, a week ago I was driving the truck home started idling rough, cruising with any load at all, was fine.
Shove the clutch in at a stop, and it will try and die out (and did a few times). i thought maybe there was some water in the fuel bowl, so i drained it, primed and cranks maybe 4-5 pulses and would fire back up but not run worth a . Limped it on to the house, still, moderate load and it would run fine, yet died pulling in the driveway, but would re start immediately. No code set.
TooK my DSP and successfully flashed the original tune back on to the truck.
Next morning I go out, cranks 4-5 times and fires up, injectors were rather noisy, and the engine light comes on. So I shut it off and read the code. "P0251 fuel control meter A" ok, I try starting the truck, and it doesn't even attempt to hit. Scanner shows I was only building 200psi of rail pressure. 7-7.5psi on the low pressure wide (isspro mechanical gauge)
I go thru the trouble shooting of a p0251, check for fuel, lift pump pressure, new fuel filter, disconnect the cp3 to rail line, inspect for debris/corrosion, perform the 3, 10 second crank intervals (at 180rpm), factory minimum spec for static fuel flow is 90ml in 30 seconds@200rpm mine pumped out 100ml in 20seconds@180rpm, pump flow is good.
Replaced the FCA with an OEM cummins unit, cleared the p0251 code. crank the truck over, and now the scanner shows it building 5300psi instantly aNd after 4 seconds, 7100psi. But won't hit.
Crack the injector lines loose and crank,it will hose down the side of the head/plenum, fuel is getting to the tubes.
No codes
Hooked a higher end snap on scanner up and checked ckp sensor and cmp sensor readings, Rpm for both are identical and on par with what the vehicle tach is showing.
AAT, IAT and batt temp are all within 4* and on par with actual thermometer readings.
Last resort, turn key on, disconnect grid heater shoot 1/2-3/4 second shot of ether in to the turbo inlet, truck cranks for 3 seconds and will hit off ether but dies once it burns it all out.
Cracked injector lines loose again, cranked the guts out of the truck, thinking it had air in the system (per old school method on rotary pump trucks) fuel coming out, tighten the lines, still nothing.
PCM communication with the scan tool is perfect, all fuses and relays are accounted for and intact as the should be.
Just seems like the injectors are not getting the signal to fire.
Any help fellas?
She just rolled over 200k and can't believe she laid down on me like this.
Shove the clutch in at a stop, and it will try and die out (and did a few times). i thought maybe there was some water in the fuel bowl, so i drained it, primed and cranks maybe 4-5 pulses and would fire back up but not run worth a . Limped it on to the house, still, moderate load and it would run fine, yet died pulling in the driveway, but would re start immediately. No code set.
TooK my DSP and successfully flashed the original tune back on to the truck.
Next morning I go out, cranks 4-5 times and fires up, injectors were rather noisy, and the engine light comes on. So I shut it off and read the code. "P0251 fuel control meter A" ok, I try starting the truck, and it doesn't even attempt to hit. Scanner shows I was only building 200psi of rail pressure. 7-7.5psi on the low pressure wide (isspro mechanical gauge)
I go thru the trouble shooting of a p0251, check for fuel, lift pump pressure, new fuel filter, disconnect the cp3 to rail line, inspect for debris/corrosion, perform the 3, 10 second crank intervals (at 180rpm), factory minimum spec for static fuel flow is 90ml in 30 seconds@200rpm mine pumped out 100ml in 20seconds@180rpm, pump flow is good.
Replaced the FCA with an OEM cummins unit, cleared the p0251 code. crank the truck over, and now the scanner shows it building 5300psi instantly aNd after 4 seconds, 7100psi. But won't hit.
Crack the injector lines loose and crank,it will hose down the side of the head/plenum, fuel is getting to the tubes.
No codes
Hooked a higher end snap on scanner up and checked ckp sensor and cmp sensor readings, Rpm for both are identical and on par with what the vehicle tach is showing.
AAT, IAT and batt temp are all within 4* and on par with actual thermometer readings.
Last resort, turn key on, disconnect grid heater shoot 1/2-3/4 second shot of ether in to the turbo inlet, truck cranks for 3 seconds and will hit off ether but dies once it burns it all out.
Cracked injector lines loose again, cranked the guts out of the truck, thinking it had air in the system (per old school method on rotary pump trucks) fuel coming out, tighten the lines, still nothing.
PCM communication with the scan tool is perfect, all fuses and relays are accounted for and intact as the should be.
Just seems like the injectors are not getting the signal to fire.
Any help fellas?
She just rolled over 200k and can't believe she laid down on me like this.
