[jmjforbes12]

Every time i come to a stop sign or red light and then take off again my truck sounds and feels like its not getting good fuel so when I finally got my fuel pressure gauge installed I can see that the fuel pressure drops from 30 psi all the way down to 0-5 psi but picks back up about 10 seconds or so later.. I have an air dog fuel pump.. Could it be going back or what? Anything helps thanks!

 

[scotty1]

Stupid question,you got enough flow in your tank?When mine gets almost empty and I stop it moves fuel to the front of the tank and the line pulls air doing the same thing yours is doing.

 

[jmjforbes12]

When my truck had the air dog installed the suction tube was cut too short so my truck runs out about quarter tank so when it gets close and i come to a stop and all the fuel comes to the front of the tank it will suck air until its get fuel again.. But I never let my truck go far below half and the pressure still wants to drop and studder

 

[jacob_stang]

How long ago did you put the air dog on? Has your truck always done this since the install or did it just recently start?

 

[jmjforbes12]

It was installed over 2 years ago and I've just recently had trouble with it

 

[country_hick]

http://www.cumminsforum.com/forum/94-98-engine/58777-joe-gs-fuel-system-writeup.html

Your OFV may be bad.

 

[scotty1]

Does it drop again when your tc locks?

 

[jacob_stang]

I also suspect OFV. I think there's a section in the write up about testing it.

 

[country_hick]

http://www.cumminsforum.com/forum/94-98-engine/241297-overflow-valve.html

 

[jmjforbes12]

okay thanks for the help ill get one ordered and installed and i will let you guys know what happens!

 

[Sour-Diesel]

id recommend getting one from these guys CUMMINS P7100 HIGH PERFORMANCE OVERFLOW VALVE OFV040HP - Tork Teknology
i installed a airdog2 165 recently along with a bean diesel sump and ran my truck till the low fuel light came on, not one problem.

 

[jmjforbes12]

okay so my new valve came last night and i installed it this morning and right away i noticed that it did seem to run a bit smoother so i took it for a test drive and came to a stop light and took off again and the pressure dropped to 0 and came back up again.. not sure what it could be?? my fuel pressure was about 2-3 psi more with the new valve.. anything helps thanks!!!

 

[Cowboy303]

It's got to be something in the tank. When you stop/start, all the fuel goes to the front/back of the tank. That lets air in your pickup tube, which then drops your pressure to nothing.