Bruce Ward
New Member
Big blue has a problem running when hot come to a stop dies starts back up feather the fuel takes off runs grate till you stop no power in reverse idle 3000.
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Bruce Wayne or Batman l have a 1994 one ton Silverado with a 6.5
- Thread starter Bruce Ward
- Start date
ak diesel driver
6.5 driver
check fuel pressure going into the injection pump
Will L.
Well-Known Member
100% the right answer.
The best thing to do is permanently mount an electric fuel pressure gauge in/on the dash. Mount the sending unit in a metal tap fitting at the ip (injection pump) after the last rubber hose. Desired pressure is 8-14 psi. Factory style pumps simply won’t get that high. Above 5psi keeps it running ok but you loose some life off the ip. Go under 1 psi and into vacuum (negative pressure) and it is harming your ip and shortening its life bad.
The other thing to do is replace the 1/4” ip return fuel line coming out the front top of ip with clear tubing. Fuel-line.com sells quality clear line. Home Depot, lowes, etc. sells some clear that is made from pvc that will work but only lasts a few years. Leaving clear on all the time is best because any time you experience issues just watch the clear line for contamination in the fuel and for air bubbles traveling through. It is normal to trap one pea sized bubble but never traveling bubbles. I don’t think air or contamination is your current issue but its super easy, cheap, and you are right there on the system. Best to do it now.
Note that the fuel supply in vacuum because of non functional LP (Lift Pump) can create bubbles in the form of cavitation.
The best thing to do is permanently mount an electric fuel pressure gauge in/on the dash. Mount the sending unit in a metal tap fitting at the ip (injection pump) after the last rubber hose. Desired pressure is 8-14 psi. Factory style pumps simply won’t get that high. Above 5psi keeps it running ok but you loose some life off the ip. Go under 1 psi and into vacuum (negative pressure) and it is harming your ip and shortening its life bad.
The other thing to do is replace the 1/4” ip return fuel line coming out the front top of ip with clear tubing. Fuel-line.com sells quality clear line. Home Depot, lowes, etc. sells some clear that is made from pvc that will work but only lasts a few years. Leaving clear on all the time is best because any time you experience issues just watch the clear line for contamination in the fuel and for air bubbles traveling through. It is normal to trap one pea sized bubble but never traveling bubbles. I don’t think air or contamination is your current issue but its super easy, cheap, and you are right there on the system. Best to do it now.
Note that the fuel supply in vacuum because of non functional LP (Lift Pump) can create bubbles in the form of cavitation.