Engine/Transmission (1994 - 1998) Fuel pressure problems?

[andrewleach]

NOW Im ticked I almost had my last post done and the darned computer dumped me! My truck`s fuel filter developed a crack and hense a leak. The filter was a fairly new wix. I figured it was a fluke, so I installed a new filter (also a wix). Now I noticed that when my truck is running the filter flexes with every surge of fuel, is this normal or do I have an over pressure problem? My truck is a 95 3500

 

[Joe G.]

You need a fuel pressure gauge to find out. We can tell without some sort of pressure info. If you have a blockage somewhere (bad overflow valve, plugged fuel return line?) the lift pump will generate a LOT of pressure. The only way to tell for sure is a pressure gauge.

 

[andrewleach]

Thanks for the response, I am in the middle of blueberry season so I don't have much time to mess with the truck. Can you tell me if I am going to wreck anything besides filters by driving my truck as is?

I do intend to check the fuel pressure, what is considered normal?

If I decide I am running to much pressure where do I find the overflow valve?

Thanks for the help, I may not be able to check out the responses for a day or two because of the blueberrys.

 

[bmoeller]

Fuel Pressure: 18-24 psi at idle, 28-36 at 2000 rpm with no load.



http://dodgeram.org/tech/dsl/troubleshooting/injector_pump.htm#Overflow



If the problem is due to high pressure, you should it out ASAP. If the gasket is pushed out, or the housing get cracked bad enough, the engine may die.

 

[andrewleach]

I Got a chance to mess with the truck a bit today. The info was a huge help.

I took the overflow valve out and even though it didn't look dirty I cleaned it out. WOW it appears to have fixed the problem. No more fuel filter flexing. It also appears to idle a lot lower. Definitely an improvement thanks for all the help guys.

Andy. Oo.

 

[bmoeller]

No problem. Glad you got it fixed easy.