Having a problem for a few weeks. Sometimes when accelerator is pushed the truck simply won't go. Just seems to stay at idle. Kind of a problem when you pull out into traffic and this happens!! If you hit the gas pedal enough times to the floor, sometimes the truck comes back to life? Also noticed when going down Highway at low rpm's (cruise on) and when the truck needed more fuel it just wouldn't get it. Once I goosed the throttle she'd roar back to life???

Changed the fuel filter the first times it happened and it seemed to fix it. But came back a few weeks later. I was on a road trip lately and it really got bad. Came home and changed the Filter and water separator (FASS fuel system). Took it out and ran the heck out of it and seemed fine??

Next morning same thing - truck wouldn't go.

Past 2 days... fine.

Is this what happens before the VP44 poops out?
Thanks for any help.

 

Check out the Tech secion on APPS reset. Might help.
https://www.dieseltruckresource.com/...n&onlynewfaq=1

 

Check for codes, either with a scanner or the key on/off method.

Turn key to on, then off, on, off, on and look at the odometer window.

Write down what it displays and report back.


phox

 

If the apps reset does not do it, look for a leaking fuel line. Its possible your getting air in the system as it cools down. It sounds like its around the Fass system, since you've changed the stock set up. If you did not have this problem before the change, I'd look at the fass really good.

I have a friend that was having similar problems, it was the VP44. His was a 2001.

Dave

 

Haven't seen any sign of fuel leak on floor, etc. How would you check for air leak???

anyone ever heard of the FASS going bad?
Thanks for the tips on the APPS reset, I'll give it a try.

 

Air leaks are usually in gaskets and mating surfaces. I've seen systems getting air at the injection line connection to the injector. I don't have a Fass system so, I don't know what that looks like. I still have the stock setup in my truck.

Dave

 

I see you have an EDGE comp. You might want to disconnect this and give the truck another try.

Possible air leak or restriction between th Fass and the tank. A lot of guys are installing the draw straw units now.

Yeah this is a sign on the VP but always do the simple cheap stuff first. No sense paying a lot for a cheap fix.

I would think about a vp however.

 

My guess is that you are going to find a Po216 code and will be replacing the VP44. SNOKING

 

I have been having the same problem for the last couple months. I dont think its any leaks either fuel or air as it disappears sometimes by just decelerating and accelerating again. This problem is intermittent. I once thought it happened more after driving for 15 mins or so and stopping for a minute and starting up again. Its like something is sticking when you depress the accelerator.
Let me know if you get to the bottom of this as I will need to get it fixed soon as well.
What is the warranty on a 2002 truck.... I thought it was 100,000 miles on the power train.
It also seems to have some affect on the way the transmission acts as well.