When I accelerate it used to be like a rocket, now very little response. I can hear the turbo whine but not any boost in power other than that of normal acceleration. It starts and runs fine..I have noticed a slight hesitation in the 50-60 MPH area. The ECM is 1 year old. It is an 02 Dodge 3500, 258,000 miles. Any help is appreciated...Doc

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hmmmmm after reading some of these posts I am thinking it might be the VP44 going south...had it replaced 125k ago....

 

Hows your fuel pressure?

Luke

 

haven't a clue...I don't have a gauge...changed the fuel filter 5 k ago...air filyer is K&N set up and clean. I'll check for any codes in the odometer window today but no check engine light on.

 

Beg steal of borrow a mechanical fuel pressure gauge to see what is available at the VP44. These injection pumps need lots of fuel to survive. The factory lift pumps are notorious for failing, and barely provide enough fuel flow. You want less the 20 PSI at idle, but never less then 10 PSI, especially at WOT.

 

I had the pump placed in the fuel tank after the first one failed...Dodge reccomended that I do this...said they hardly ever fail when in the tank. Nonetheless I will take it and have the fuel pressure checked at the VP44 at idle. Should be below 20 but not near 10.....I checked the odometer for codes and there were none. Doc

 

You should have ran away from the in-tank pump. They are even more of a headache than the original carter lift pump

 

so when the fuel pressure is checked..it will be around 20 from the lift pump in the tank and the same at the discharge point from the VP44? Or is there a difference in the readings? Is it approx 20 from lift pump side to discharge side of VP 44?

 

Measure the pressure at the inlet to the VP44. It doesn't matter how much the pump is making if it isn't available at the VP44. No more then 20PSI at idle, no less then 10PSI at WOT.

 

RAW knows what's up... but I'd bet just about anything you won't even be seeing 10psi at idle. Dodge might be right, the in tank pump might not die, but it also isn't even capable of supplying the amount of fuel needed to keep a vp44 alive.

You need a good pusher pump, a fuel pressure gauge, and a draw straw to fix yourself up real nice... and hopefully for your sake your vp still has a few good years left in her.

 

Boost leak