Help.....
LB7 DURAMAX PRIMING PROBLEM.
I can prime the system with the fuel filter head priming pump but it will not hold pressure, like, I can pump it up hard, then after a minute or so it loses pressure. Bearing in mind that it's a brand new priming pump and that there's no problems with the lines back to tank, and no air intake in the line to the pump. I was wondering if there's a problem with the cp3 pump or fuel pressure regulator maybe, as I can take the delivery line off to the cp3, put my thumb over it, and there's no suction at all.
I have taken the oil filler tube out and had a look to make sure that the pump gear isn't spinning on the shaft, and it's all good.
I have put a gauge on the Schrader valve, pumped the gauge up to 14 psi, then watched it lose pressure.
My question is, besides the gears in the pump, is there any thing else that would influence a loss of suction? Does the fuel pressure regulator play a part in this? I'm trying to establish if this problem is electronic or mechanical.
So at the end of the day I guess I have two problems, filter head not holding pressure, and no suction from the cp3 pump.....would/could these two problems be related?
Any help on this matter would be appreciated, as its really doing my head in.
LB7 DURAMAX PRIMING PROBLEM.
I can prime the system with the fuel filter head priming pump but it will not hold pressure, like, I can pump it up hard, then after a minute or so it loses pressure. Bearing in mind that it's a brand new priming pump and that there's no problems with the lines back to tank, and no air intake in the line to the pump. I was wondering if there's a problem with the cp3 pump or fuel pressure regulator maybe, as I can take the delivery line off to the cp3, put my thumb over it, and there's no suction at all.
I have taken the oil filler tube out and had a look to make sure that the pump gear isn't spinning on the shaft, and it's all good.
I have put a gauge on the Schrader valve, pumped the gauge up to 14 psi, then watched it lose pressure.
My question is, besides the gears in the pump, is there any thing else that would influence a loss of suction? Does the fuel pressure regulator play a part in this? I'm trying to establish if this problem is electronic or mechanical.
So at the end of the day I guess I have two problems, filter head not holding pressure, and no suction from the cp3 pump.....would/could these two problems be related?
Any help on this matter would be appreciated, as its really doing my head in.