TDG MAFIA MEMBER #77
Join Date: Jul 2006
Thanked 11 Times in 10 Posts
How is your fuel pressure?
Is the EBPV stuck partialy shut?
How about oil? Is it full? Been changed lately?
Start with the simple stuff - oil, then move on to the fuel pressure. If you are low enough on oil, you will be weak on fuel pressure.
How to check fuel pressure.
Get a good liquid gauge that runs up to 100 pounds and attach it to 3 feet of fuel line (1/4" ID) and appropriate fittings. You will need 2 hose clamps. Remove the guts to the shreader (sp) valve on the side of the fuel filter and clamp the hose on. Place the gauge on the windshield where you can see it from the drivers seat and crank the motor. You should see a minimum of 45 pounds. Rev it up and see what happens. If the pressure drops, start looking for the cause. Could be a bad pump, bad filter, return line screen could be clogged up, etc.
I have a friend that owns a diesel garage. He had a late 99 come in last summer with the same symptoms you have. He went through all of the obvious things to check and it was all OK.
He ended up taking out the fuel tank and found that it had about an inch of a black carbon / crystal build up in the bottom of the tank that was blocking off at least 85% fuel delivery to the pump. He cleaned it all out and the problem was solved.
Let us know where you get.
1999.5 PSD, 4x4, Auto trans, 6.0 Trans cooler, ZooDad Mod, ISSPRO Trans - boost - EGT gauges, Wicked Wheel, 5inch Stainless tip, 315 75 17 BFG AT's, ProComp 9000's at the corners, Fumatomo Valve, Pooned tank, DP Tuner F5 w/ 80 tow, 80 econo, 120 race and permagrin!