Engine/Transmission (1998.5 - 2002) Fuel System Problems

[JMcKee]

I just installed a set of Isspro gauges (boost, egt, and fuel pressure) on my truck tonite and my fuel readings are alarming. I am getting 12 psi on initial startup which then drops to 4 psi after a few seconds. While driving around town under any load 0-1 psi is all it reads and nothing at WOT. I talked to the local diesel mechanic and he claims psi is not a issue anymore. His shop tests volume out of the lift pump not psi. From researching this forum i have found that anything below 5 psi is bad news. I am pretty sure the guage is working properly except for the question of bleeding it. Is it necessairy to bleed a fuel pressure guage at the actual Guage? Are there problems with my lift pump? If so what reccomendations do you guys have for helping my situation (Vulcan, pushers ect)? I plan on putting a comp on this truck but i wanted to get all my bases covered before i go on getting more power out of the truck.



thanks

joe



02 2500 quad cab short bed, 5 speed, Strait pipe, BHAF, Isspro egt boost and fuel pressure, silencer ring fell out!

 

[easleyj1]

You'll get about a thousand different opinions on this. 0 psi WILL kill a VP44, I know that from experience! I used a Carter 4600 as a pusher it was inexpensive and I am pleased with the results. Stock LP had 13 psi idle 9 cruise and 6 WOT, with my pusher I get 24, 17. 5 & 15. 5. If I recall I have less than 130. 00 in my set up.



Jonny

 

[keimmmo]

Too much pressure on the VP is also bad. It won't kill it as quickly as low pressure, but it CAN cause trouble... been there and done that.



I run a factory LP relocated to in front of the fuel tank and big lines and fittings... a "home brewed" Vulcan kit. I would vote for that system unless you need more volumn due to power modifications.



Too much or not enough fuel pressure and the effect it has on the VP... that is why we recommend a fuel pressure guage!!! They are SO cheap compared to the problems that happen without one!!!



Steve Keim