Engine/Transmission (1998.5 - 2002) VP 44 Diagnostics

[hcpBILL]

Can someone describe the process the service personnel use to check the VP 44 fuel pump? And what should I expect to pay to have the VP 44 checked out?

Thanks

Bill

 

[Gary - K7GLD]

Can someone describe the process the service personnel use to check the VP 44 fuel pump? And what should I expect to pay to have the VP 44 checked out?

Thanks

Bill

Good question - I have one that needs a checkup too...



I would imagine the first step is placing it on a VP-44 test stand for analysis - a process I'm told that takes a couple of hours time - I'm guessing a basic analysis would run $200-$300. And then any problems detected still have to be corrected.



Maybe Brady from II or one of the other reps will chime in...

 

[Cummins Thunder]

Just run it till it won't run no more



Very few shops are certified by Bosch to service the pump.

Why do you want to "get it checked out"??



CJ

 

[BradyWilliams]

The process for checking out a pump would be:

1. Check the PSG and IAT with the test stand computer for problems.

2. Check the pump for water or dirt contamination.

3. Check the steel diaphram and seals by taking distributor head out.

4. Mount pump on test stand and run pump through complete recheck tests.

5. Check timing and verify offset key to be correct.

6. Cap and bag pump for shipping back to customer.



It takes 2. 5-3 hours at 77. 00 per to do all this, however if we see any problems at any point that need to be serviced then we contact the customer and advise of service needed.

 

[Gary - K7GLD]

Thanks for the detailed info - about as I had figured...

 

[hcpBILL]

Why I want it checked- -

I had lift pump issues (doesn't everyone?) and the last time it had zero pressure and ran fine. I drove about 400 miles with it that way since it had normal boost and EGT for my truck. When I replaced the lift pump I also re-located it using the Vulcan kit. Now it has 15-16 # and at full power 13#.

This truck only has 53,000 miles and has had the dead pedal only infrequently for the last 20,000 miles. I was told to check the IAT and MAP sensors first since it has an exhaust brake so that may be my first step.

Thanks for the feedback



Bill

 

[Gary - K7GLD]

To me, the final nagging issue when considering a basic checkout, and replacement of the obvious issues that reveals, is what about other deeper, internal mechanical components?



For instance, if the PSG is found to be bad - and replaced, the pump MIGHT check out on the stand - but still have the expected wear and shortened lifespan in other parts resulting from however many miles might be on the pump at time of inspection.



I would guess that replacing ONLY a bad PSG for instance, could run the total close to $500 - but what about the remaining internal parts that might LOOK ok on a test stand - but not be actually taken apart for specific inspection?



Is it dollar wise to replace ONLY the obviously failed parts - and continue to run on the rest of the used internals - or better to bite the bullet and go for the total rebuild?



I still haven't figured that one out - and I suspect that is a question that the customer must decide on his own!