Engine/Transmission (1998.5 - 2002) hard acceleration, motor dies

[paniolo]

after a hard accelaration, if i let off the gas suddenly the motor will die. won't restart unless i crack and bleed the injector lines. i got stock and bd pusher pump with good pressure 20 at wot. is the problem air in the line? would i be better off with an airdog?

 

[GarrettPetersen]

your causein cavitation in the pump which is bringing out the small/invisible air bubbles which is makein the air in the lines. Only remidy for that I know of is dont back out so quick

 

[DCreed]

do a search ,the VP44 likes high FLOW but not necceasrily high pressure. It needs only 5psi@ WOT and can only use 14psi. so 10-15psi with larger 3/8" lines will work much better than 25psi in 1/4" lines.

 

[NoSeeUm]

It is fairly common for this to happen with heavily fueled trucks. Feather the throttle when you let off or just let off more slowly. The VP44 gets airbound.



Jim

 

[480RUGER]

I have the same problem. Will a higher output VP44 help?

 

[johncameron]

after a hard accelaration, if i let off the gas suddenly the motor will die. won't restart unless i crack and bleed the injector lines. i got stock and bd pusher pump with good pressure 20 at wot. is the problem air in the line? would i be better off with an airdog?

What mods have you done?



I have killed my truck this way, it took forever to re-start. Scared the ***** out of me

 

[rkressg]

I have done this many times with my truck (when driving like an idot).
To keep my truck from dying, I will push in the clutch, and if the engine begins to die down quick, I will begin to give it gas, possibly reengaging the clutch to keep the engine running.

I am running a FASS 155 with 1/2" lines to the pump (with 1/2" pickup in tank).
I have EDM Stage 4 BullyDog injectors, TST Comp, Smarty, and a HR-VP44 (and a bigger turbo)

 

[paniolo]

thanks for da replys. got a FASS 150 on order. i think thats rated at 17psi.

 

[480RUGER]

I hope the FASS will help you out. I have the 150 FASS, ½” lines and the Draw Straw. No doubt in my mind I needed these things but it didn’t stop the problem.