Mopar1973Man
Senior Member
- Joined
- Aug 22, 2011
- Posts
- 825
- Reaction score
- 21
- Location
- New Meadows, Idaho
- Ram Year
- 1996, 2002
- Engine
- 1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
Ok Gang...
While I was out on my camping trip and hauling around my 31' Jayco Eagle Travel Trailer I had some weird fuel pressure problems occuring. Start up cold and get 17.5 just about 18 PSI at a idle and then pull the grade up to New Meadows, ID still holding 16 PSI which is normal and fine. But now as the day got hotter and we got down around Council, ID the pressure fell off to 12.5 at WOT and idled at 15 PSI. Hua??? While I was stopped the at one place I played with bumping the starter and you can see 17-18 PSI and then hear a change in pump pitch and the pressure fall again to 15 PSI. It's like the check ball is hanging up again. So I'm going to pull it back apart and double check again. So later on down the road I pick up fuel I figured I add a extra few ounce of 2 cycle oil than typical. Well the pressure went right back up to normal 17-18 PSI at idle and remain normal the rest of the day with no problems.
(Enjoying our camping)
Now hitched back up early morning and started my way back out of Lowman, ID and got good strong fuel pressure. But by the time I got to Banks, ID the fuel pressure was starting a to fall again. It went back down to the 12-15 PSI range again. On a few other stops I play again with bumping the start and sure enough yo can see 17 PSI for a burst of a second or two and then falls with change of pitch of the pump. I wondering if the fuel temperature is effecting the check ball and spring some how that its not working properly? Because with cold fuel its working fine but as a soon as the fuel warms up it sinks in pressure?
Yes... I got a fresh set of donaldson filters on my truck and no change with that...
While I was out on my camping trip and hauling around my 31' Jayco Eagle Travel Trailer I had some weird fuel pressure problems occuring. Start up cold and get 17.5 just about 18 PSI at a idle and then pull the grade up to New Meadows, ID still holding 16 PSI which is normal and fine. But now as the day got hotter and we got down around Council, ID the pressure fell off to 12.5 at WOT and idled at 15 PSI. Hua??? While I was stopped the at one place I played with bumping the starter and you can see 17-18 PSI and then hear a change in pump pitch and the pressure fall again to 15 PSI. It's like the check ball is hanging up again. So I'm going to pull it back apart and double check again. So later on down the road I pick up fuel I figured I add a extra few ounce of 2 cycle oil than typical. Well the pressure went right back up to normal 17-18 PSI at idle and remain normal the rest of the day with no problems.
(Enjoying our camping)
Now hitched back up early morning and started my way back out of Lowman, ID and got good strong fuel pressure. But by the time I got to Banks, ID the fuel pressure was starting a to fall again. It went back down to the 12-15 PSI range again. On a few other stops I play again with bumping the start and sure enough yo can see 17 PSI for a burst of a second or two and then falls with change of pitch of the pump. I wondering if the fuel temperature is effecting the check ball and spring some how that its not working properly? Because with cold fuel its working fine but as a soon as the fuel warms up it sinks in pressure?
Yes... I got a fresh set of donaldson filters on my truck and no change with that...