As noted i recently bought a 2002 QC 3/4 cummins 4x4 with 62k miles. i want to know what product, if any can i add to the truck to insure i will not have to worry about fuel starvation problems. i have heard of the FASS system. If this added, can I be sure that common problems with these lift and injector pumps are gone? Any insight would be appreciated. I stay worried when i drive my truck all the time that something could go wrong. i want to head it off at the pass!

 

another one to look at is from glacier. it uses a walbro pump and lots of people are very happy with it also

brett

 

Does this pump insure me from the common pump problems with the vp44 and lift pump? Also, does this work with the stock lift pump or does it take the place of it. Thanks.

 

i believe it replaces the stock lift pump, and there is no fool proof way to keep for vp44 from taking a dump eventually, but keeping it cool is definately not going to hurt it

brett

 

the only thing thats going to "insure" you from replacing a lp or a ip is a p-pump conversion. But to do that will cost anywhere from 2,000 to 8,000 dollars.

You can put on a fass or a walbro pump, but if you own a vp44 powered truck long enough you WILL have to replace your injection pump.

 

absolutely. the only way to not worry about the vp is to sell your truck, and get a 12 valve. a p pump swap is not cheap to do it right and they are not easy to tune like the 12 valves. i am not sure why but it has been a problem. the only p pump 24 valvers are high powered drag or pull trucks.

 

That's an awful broad statement, not to mention a false one at that.

 

Another option is to put in a H2 cam from Formula 1 diesel. It has a lobe to drive a 12 valve lift pump where a dummy cover sits on the 24v block. It is as fool proof as it gets with the lift pump. It still will not guarantee the VP not crapping out. I'm on about a year with mine. So far so good. It is a little more expensive than a FASS, but not that much more. Once you do this, you are done worrying about fuel supply.

Oh, and you get the added benefit of better low end power and better air flow through the head.

 

MITUSA mechanical lift pump,#1 in my book over any eletrical pump.
www.opieparts.com let me know if you want more info.

 

Well looks like these guys about have this one covered =P
Ever thought of running a regulator to keep fuel pressure down a bit Matt?

 

If I thought I was having any adverse effects from the fuel pressure I might consider it. I can't see that I'm having any issues at all. I guess I trust that Don got the lobe right to drive the fuel pump properly to keep it in the psi range it needs to be. Do you think you are having any issues?

 

No, but I'd feel better if I was seeing 20-30 psi instead of 50 at cruise. No need to stress the seal on the vp if it doesn't help performance wise. JMHO

 

I never get any higher than 40. Never pulls down below 28 or so. Seems acceptable to me, but what do I know. I've had it a year and no problems. That is where my judgement is coming from.

 

Logically speaking, a P-pump conversion is a poor way to fix a VP-44. It is an expensive conversion. It may have a place, but the P-pump can not do what a VP-44 can. A VP will run the perfect timing reguardless of load, temperature, RPM, altitude, or boost pressure. A P-pump runs the timing it is locked down at in any and all operating conditions.

Put a good fuel system on it - either a GDP or an AirDog. If you get the GDP, use the 2 micron filter kit with it - the AirDog has 2 micron filters. Use a good fuel system additive EVERY tank. Use Stanadyne for lubrication of the pump - alot of over the counter stuff is very poor quality and a waste of money.

 

Texas, don't let all the negative posts make you paranoid. Just remember that for every vp44 or lift pump problem there are many more that are trouble free. My advice would be - Get a fuel pressure gauge. Move the lift pump back to the frame ( the OEM pump is OK back there).
Watch your pressure and don't worry about it. There is no fix, or any other truck or vehicle that can guarantee nothing will ever break.