fuel pressure

  1. H

    LGH (detuned LML in a van) Engine Shuts off at full throttle

    Whether parked or driving, engine revs up with throttle at full throttle until suddenly it shuts off. Actual Fuel PSI exceeds Desired but shuts off before DTC can set. New MAF, temp sensor at air filter, Fuel pressure regulator 2, fuel pressure sensor. If you drive it below full throttle you can...
    • Hoopdee-LGH
    • Thread
    • engine shuts off fuel pressure fuel system full throttle lgh stall
    • Replies: 1
    • Forum: Van
  2. H

    LLY loses fuel rail pressure after it warms up

    Hey There, the problem started when I was pulling my trailer down the highway and noticed a lack of power and black smoke. When I got back home I used my CTS 2 insight to show me the desired and actual fuel rail pressures. When I first start it after a couple of days and drive it, the desired...
    • hottlead
    • Thread
    • fuel pressure lly
    • Replies: 3
    • Forum: LLY
  3. P

    (SOLVED) Weird fuel pressure symptoms

    Alrighty here goes nothing… My idle fuel pressure is at 9,000 psi I have tried commanding it higher or lower with my tech 2 to no avail. I disconnect the FPR no change. If I disconnect the Fuel Rail Pressure Sensor I am then able to command a change of pressure with my tech 2. 2005 GMC Topkick...
    • PressPause
    • Thread
    • fpr frps fuel pressure fuel rail pressure regulator
    • Replies: 20
    • Forum: LLY
  4. R

    fuel problem need help

    OK I have an lb7 was driving down the road blew a huge cloud of white smoke started fuel knock next day would not start figured it was injectors to it to dealer to test the guy said he could not check because truck was only building 600psi of fuel pressure and told me to check the return fuel...
  5. slipagnt

    LB7: No rail pressure

    Can anyone give me the wiring of a fuel pressure sensor on a lb7. I bought the truck a couple of years ago and the previous owner chopped the plug off of the harness for some reason. It has cheesey spade terminals crimped on now but I don't know in which order they plug into the sensor.
    • slipagnt
    • Thread
    • fuel pressure lb7
    • Replies: 5
    • Forum: LB7
  6. J

    2001 Duramax loses fuel pressure and battery dies while parked

    I have a 2001 Duramax 6.6 liter that if it sits for sometimes as short as 4 days or sometimes as long as a week, will not start. I have to manually prime the fuel system in order to get it started. It will then run fine. Again, it can sit over night or for several days and start without any...
Top Bottom