Archived Help with fuel system

[WPierce]

about two weeks ago my lift pump went out. no biggie figured it out ok put a new one on and last week it ran fine. yesterday i was coming home from school and it just shut off on me on the freeway. bled the system on the side of the freeway and made sure it had diesel in it and brought it home. . rebled everything for good measure. took it out for a test drive and it runs fine untill you gas it hard. them it will get to about 2200rpm and stay there and flutter. then when you go to stop it will just die. . need help quick or else i wouldve searched the archives. this truck is by all means not stock its a 94 cummins in an 82 chevy. any suggestions would help. . thanks





Edit... Went out for a coup;le minuites and took it for a drive. brought it home and revved it to about 2400rpm for a couple of minutes. about every 30 seconds without a load it would flutter for about 5 seconds and slow down to about 1700 rpm and them pick itself back up. and the motor only has 10000 miles since the rebuild in 1999

 

[DieselMinded]

possible...



http://www.dodgedieseldatabase.com/injector_pump_overflow_valve_diagnosis.htm



DM

 

[RAJohnson]

DieselMinded I think you missed this one. Its a 12V not a 24V with a VP44. It should have a P7100 pump. WP is that correct.



Nope sorry for that I Missed it. Your correct

 

[DieselMinded]

The overflow valve is for the p7100 pump



DM

 

[WPierce]

thanks, now do you think this is a part i can get from the local parts house. . or would it be better getting it from piers?? and which is the cheaper? will i have the same problem if i get a stock replacement?



i also have a helper pump on the truck and im going to replace it. . what would be a good sized pump to put on it?

 

[Joe G.]

Better to search the 12 valve forum. Save you some time to do that. You could have an air leak which may not be easy to find.