High Pressure Pump

[trcytylr]

I have a 2000 F350 7.3 that is being diagnosed as a possible bad high pressure oil pump. The mechanic says my truck is only showing about 440 pounds of pressure and it takes 500 pds to function.

The truck had been cranking and would run for about 3 to 4 seconds and die and then would be hard to crank.

It cut off the other day at a red light and would not crank again.

I found a rebuilt one online for $379.00 Has anyone ever used a rebuilt pump? Any problems?

Thanks

[kaya@bernhausen]

your mechanic needs to isolate or "dead-head" the pump to determine that. it could be an injector o ring causing the lack of icp. or even the ipr valve

[trcytylr]

My mechanic doesnt have a tester. He has never had to test one. The only shop here that can actually test(or the cheapest shop) is $103 per hr and said it would be 2 hrs. $206 plus wrecker bill to tow to another shop. Looking at $300.

Pump is $379. How much is a test kit??

[jesilvas]

There's not a kit.
All you do is just set it up to keep the HPOP from sending pressure to the oil rails, and test right off of one of it's outputs. See what the pump puts out by itself and not connected to anything.
You could have a bad pump, a bad injector control pressure sensor, a bad injector pressure regulator valve, or a leak somewhere around injector(s).

I know it's expensive, but it's a diesel. No getting around it. DIY or take it to someone who actually knows what they're doing.