'99 2500 Ram Diesel Lift Pump Problems?
Fellow Members, let me throw this fuel pressure concern by you.
I have a 99 2500 RAM with the diesel engine. Two years ago the lift pump on the side of the engine fails which then killed the injector pump. Took it to the dealer and $3800 later, a rebuilt injector pump and a new fuel pump relocated in the fuel tank were installed.
My mechanic friend suggested a that I should install a fuel pressure gauge which I promptly did. He told me if the pressure gets below 5 lbs, something is going wrong.
The pressure usually runs about 7 pounds when the engine is working hard and runs around 9 pounds at idle.
A month ago, I was on the road with the truck and about 3 hours into the trip, the pressure dropped and when the foot feet was pressed down, the pressure would drop down to about 3 lbs. I backed off and nursed it home so the pressure would stay above 5 pounds.
I took it into the shop 4 days later and the pressure was back to 8 to 10 pounds. They plugged in the computer and everything is supposedly OK. I talked the mechanic and he said as long as the pressure is above 0, it is OK. I asked if he would put that in writing with a guarantee to replace the injector at no charge but he declined.
I took it out on the road again this past weekend and once again after 2 hours on the road, the pressure dropped down and if I pushed the engine, the pressure would drop down to 2 to 3 pounds. Once again, I backed off and nursed it home trying to keep the pressure above 5 pounds.
It is going back to the shop on Thursday. Is it possible that the lift pump is shot after 10,000 miles? I don't want to spend another $4000 for a new lift and injector pump. Should I go ahead and have the pump replaced? and is there a better after market pump I should install verses using the standard Dodge pump?
Your assistance is appreciated!
Dave in Pierre, SD