turbo dreams

i have been having dead pedal a couple of times now. usually going down the raod once i am in overdrive. i try to accelerate to go up a high and nothing happens. i have top shove the pedal to the floor to finally get the tranny to downshift and go. no CEL. pulled codes anyway and got the p0216 twice. the vp has less than 50k on it. i changed it a year and a half ago. the truck starts fine and runs fine until i cruise for a little while in overdrive then i get this dead pedal. last time my pump dies i was getting hard start issues and it would surge when i put in in drive from park. therefore i am not quite sure it is the pump. could it possibly be another sensor which is going out that is altering the pumps performance? do these trucks have a throttle position sensor or is it the apps sensor? what does it do? how does it work? where is it located and how much do they run? thanks

graphitecumnz

Sounds like another VP-44 is in your future...

turbo dreams

i seriously hope not. this is getting pathetic now.

graphitecumnz

Having had both a VP-44 and an APPS go south, they were completely different symptoms. Your description is what my truck did for about 6 months as I nursed it to a complete and totally dead VP-44.

You list a Carter as a pusher, does that mean you are still plumbed into the factory pump as well??

camelracer

I had the same problem at just over 50k miles. Two dead pedal incidents and a P216 code. Except for that the truck started ran fine. The fuel pressure has always been good. The dealer replaced the VP44 under warranty.

graphitecumnz

fwiw, fuel pressure isn't the end all in VP-44's life... you also need fuel volume.

blackdiesel

I've had two different VP'S last less than 10k (on two diff. trucks), so your's lasted 5 times long than those two did. Fuel pressure and volume are just two things that can shorten the life of a vp, but they can, and do die, just for the fun of it.

turbo dreams

that makes me so sick. i can assure you this is the last pump I will replace. truck is going after this. i was told though that the tps might be the cause. it has similar symptoms.

blackdiesel

I would think it would have a APPS code if that was the case.

graphitecumnz

I don't think I've heard of too many APPS resets/replacements clear a P0216.

There is a good writeup on Blue Chips website about VP44 failures... it's a must read.

stonewalldiesel

Been through this a few times now. First time it happened I thought right off that it was the VP44. A year later same thing but what was strange is if I turned off the truck and restarted it was fine. Again it happened and this time I noticed my edge comp box was flickering. I shut it off and worked fine. I started researching and noticed the problems started when I had my comp box upgraded to hot. I have had 3 different boxes replaced by edge and this last time I had thenm set it up back to Comp only. I believe all of my problems were related to the comp box. I bought a rebuilt VP44 the first time and I blieve there was nothing wrong with it. We shall see if this works.

Copenhagenjunkie

You could try the apps recalibration method, it's free.
http://www.dieseltruckresource.com/d...65&postcount=9

Did you change the lift pump when you installed a new vp-44?, Do you have a fuel pressure gauge? It is likely that your vp is dieing again if you answered no to the questions.