fuel pressure

  1. twebuh

    Fuel Pressure

    My tuner told me my injectors are running 100% duty cycle right now and that I can either do the very expensive injector upgrades (its already MFI upgraded) or I can increase the fuel pressure somehow. What have yall done to achieve higher fuel pressures? Or am I just stuck with my injectors...
  2. Angelo

    Low (fuel) pressure switch that closes at <= 5 PSI

    This is for a 1996 6.5L TD ambulance which weighs approx. 12,500 lbs. Currently using a 1993 lift pump and have been happy with the higher pressure, but I want more. Right now idle is 9-10 PSI but it will drop down to 1-2 PSI at WOT. I plan to have 2 lift pumps inline. One will run constantly...
  3. J

    96 Chevy 5.7 Fuel pressure issue

    96 Chevy K3500 with the 5.7l It has about 215K miles. I am trying to diagnose a fuel pressure issue. My truck first started to run rough like it had a miss. Check engine light came on. I had codes for both banks being lean. I cleaned the MAF sensor with no change. I checked for vacuum leaks. I...
  4. T

    1996 k2500 low on power

    1996 k2500 5.7 fuel pressure is 60psi with key on engine off when it is idleing it drops down to 50psi and after i turn it off it will drop to 0psi. reason i checked fuel pressure is truck is low on power all across the rev range. is there anyway to tell if it is fuel injectors vs fuel regulator...
  5. chris2323

    Increasing Fuel Pressure on Spider Injectors

    Does anyone have any experience increasing fuel pressure on the spider injectors? Its my understanding that there is a torx adjustment screw on the fuel pressure regulator. Some people have said they were able to increase pressure up to 70psi. Currently seeing over 100% injector duty cycle at...
  6. J

    2000 gmt400 3500hd 7.4 vortex low power

    Hi folks I'm new here and this is my first post. This should be the right place for questions for this truck. Truck has 90k miles with a 12' flat bed. Fuel pump had been replaced before it was parked a couple years back. When got it up and running had low power, wouldn't hardly pull itself...
  7. C

    Starting Issue

    If this is the wrong place to post, I'm sorry I can never figure out any of these forums. So I have a 1998 vortec 5.7, and randomly about once a month, it will crank and turn over but then instantly kill itself. (I have a video but I can't attach it, If you want me to add you on snap, facebook...
  8. BkY32

    Engine hydro locking from fuel.

    Alright before I start my truck was stripped kinda. I was away for a year on the other side of the USA. Good chance they could have took my fuel injection and put in their truck cause his was messed up and there was a used tube of gasket maker in the battery tray. I get my truck towed back I...
  9. F

    Eating fuel pumps

    I posted in the towing section because that is the main duty of the truck. 1997 K3500 7.4l 4l80e stock except Five O Motorsports injectors and Gibson short header and flowmaster 50 series I keep burning fuel pumps. 500 to 1000 miles (roughly). I bought the truck with a hole in the bed for...
    • Franksmith
    • Thread
    • fuel pressure fuel pump fuel system
    • Replies: 12
    • Forum: Towing
  10. D

    Low fuel pressure in first gear.

    Hey everybody! Due to the terrible nature of things going on I have been labeled non-essential and have been laid off. But never the one to sit on my butt, I decided to work on the old girl dealing with one of the most annoying features of the truck. It has a tendency to, when warm, bog down...

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