Engine/Transmission (1998.5 - 2002) PDR Hi output Injector Pump

[BillGotthelf]

Is anybody using one? I believe I need a new one and was debating. I e-mailed Piers on Wed but have not recieved a response yet. hat is the difference between stock and the High output pump?

 

[HVAC]

Prediction

I predict your topic is going to get moved to either the products forum or the 12v forum.

 

[Evan A. Beck]

I don't see why this was moved, since it looks to me like a 24V question...



Are you asking about the VP44 standard and High Output pumps? If so, the standard one is for the 215 and 235 HP engines (ETC), and the high output version is for the 245 HP engines (ETH).

 

[Vaughn MacKenzie]

Evan, looks like he's a `12-valve guy



Vaughn

 

[illflem]

Look's like Bill is both, maybe when we find out which one he's refering to this thread will end up in the right spot.

 

[C. Harlan]

Maybe he is looking to do the P7100 conversion! Then he would be a switch hitter in the threads!!



-Chris-

 

[BillGotthelf]

Guys right now my truck is dead-see 911-I'm talking about my 1999 vp44 pump. Piers has two vp44's listed. I was wondering how much more fuel delivery I would get if I used the HO. Hey mods please put it back in the correct area. Thanks

 

[HVAC]

You would be best served with a pump to match yours. A couple years ago we found the ETH trucks were not able to make the same power as the ETC. In later year models this doesn't seem to be a problem. The most powerfull 24v trucks have the ETC pumps.



What happened to your pump? Why do you think it's shot?

 

[BillGotthelf]

HVAC-I don't know for sure except truck (1999) is sitting in driveway dead. It will not fire and in the 911 column someone suggested the crankshaft position sensor might be the problem. I am not sure how to test this without replacing that part. As for Piers injector pumps I was just checking my options.

 

[cowboybarber]

If it was your crankshaft position sensor your tach would have gone crazy. (up and down,up and down). But when my sensor was shot I still drove like this for two or three days until I got another one. My truck would die, but would always start back up after a while.

 

[A Johnson]

Correct answer; it does not need crank or cam sensors to run , only the position sensor inside the VP-44.



Easiest way to make sure it is not an issue with Vp-44 electricaly, is to use the VP-44 breakout tool to eliminate all other wiring.



A Johnson

 

[HVAC]

VP44

I'm inclined to agree with the others regarding the CKS. I've seen a number of truck run with faulty CKS. Like the guy said, the tach goes wacky.



As was also mentioned, time to isolate the VP44 by using the test tool, or outside of the factory wiring energize the pump to see if the engine starts.

 

[Roger rodbolt]

Bill,

Watch your tach while cranking the engine, if the needle moves up to cranking rpm with the starter engaged, the crankshaft sensor is most likely NOT your problem. Unhook or disable the air intake or "grid" heaters and spray starting fluid in the intake air hose off the air cleaner while someone else is cranking the engine. The truck should run on starting fluid but feed it only what it need to idle a bit. If it doesn't prime and run on it's own I'd check for fuel to the VP44 and procede to checking the pump as mentioned by others. If you do need a pump I noticed that LSFarm picked up a good '99 VP44 on eBay last week. You should be able to pay him a nice profit and still save yourself some serious $$'s. Let us know what you find, please. Larry

 

[A Johnson]

Good idea on the starting fluid, I don't know why I didn't think of it, but I have had several that would start on starting fluid and remain running on diesel, and if you shut it off would have to use ether to get it running again. I suspect whats happens is the rpm (with the ether) is fast enough to bring internal VP-44 vane pump pressures up high enough to over come the fault within the VP.

If ether works I would say its time for a VP-44. Good Luck.



A Johnson