My truck is showing conditions of a vp that is on the verge of going out...and im trying to stay on top of things and do my homework before it does. I am not very knowledgable on the p-pump process, and im hoping someone can fill me in on exactly what a p-pump is and how it works. Scheid offers the conversion, i don't plan on doing it myself, i was just wondering if this would be the way to go. my truck only has 145,000 miles and i want it to last much longer. are there any other options? thanks.

 

i would say to get a fuel system but you already have fass, some guys add old motor oil or 2stroke oil to the fuel tank when they fill up for that little bit of extra lubrication (how much im not sure) if it goes out then as far as i know you have 2 options, vp44 or p-pump.

 

Basically, you are replacing an electronically controlled rotary pump with an all mechanical inline pump. The P7100, which was standard on 94-98 12v trucks, does not bolt up directly where the VP44 sat, so things like the timing cover, injection lines, lift pump, and so forth need to be replaced. There is also the need to dial in the new pump to run well in this application.

 

I'd call Scheid and discuss it with them...

The conversion can be done but some have reported issues with getting everything properly dialed in... if you're going to have someone do the conversion, have the professionals do it.

 

any ideas on how much a conversion would cost cause i would also like to get rid of the VP problem?

 

I spent a little less than $4k on parts for mine. Pay a shop to do it, I bet you'll be looking around $8k to have it done.

 

If we're talking several thousand dollars to do the swap, might as well just buy a 12v engine and have the whole engine swapped in. Just go with some fuel system upgrades and get that hotrod vp44. Ain't it supposed to be real good?

 

HRVP I had was absolute crap. (Obviously) never again!

 

I'd swap the engine before I did the pump swap, but thats personal opinion. To do an engine swap though I think you need an engine wiring harness from a 98 12V.

 

Thats the biggest downfall to swapping an engine. Less mechanical work, but much more electrical. Being that I hate wiring with a passion, I opted for the mech. route. Engine swap would be more cost effective, especially if your 24v is still good. But cost effective and the diesel hobby don't always go hand in hand.

 

Put a fuel pressure guage on you vp truck, and an aftermarket lift pump and run it, when the VP fails buy a good replacement and drive it. Alway use a fuel lube.
You can buy a lot of VPs for 4,000 to 8,000 dollars.

 

You shouldn't have anywhere close to 4000 in a p-pump swap. Haisley has a kit with everything you would need for 1550 bucks minus the pump.http://www.haisleymachine.com/PERFOR...20PRODUCTS.htm

 

I used the Scheid kit for mine, which was $1788 USD ($2k CDN) at the time. You still need a pump (I paid $800 USD, which was $1k at the time). You still need low pressure fuel lines, shut off solenoid, brackets, need to cook up a bunch of the linkage still, OFV, return lines, lift pump, etc. There is a lot that is not included that you need to scavenge. Its far from a complete kit. Its complete to mount the pump, but there is still more needed.

 

I was going to - but ended up getting a bad pump which drained my wallet so I abandoned the idea and sold back the stuff. 12v timining case, pump gear, pump, lines, re-poped injectors, riser for intake manifold, mounting brackets and getting fuel to and from the new pump. I had planned on a haisley cam and 12v lift pump but a fass will work well. They rock some socks when done well but can be a pain to get perfect (like jetting a carb) and little things would be in the way - resale value depending on buyer, MIL, what to do with the vp harness, cruise cntrl, tach, and the 2-8K that it may cost. Weigh the options and see what it means to you. Good luck!
TNutcher

 

OK so i'am kinda leaning more towards just getting a new vp...everyone says to put a SO pump on instead of another HO like i have now. How would i go about acquiring one of these pumps?