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Cutting Out Under Hard Acceleration/Above 68 MPH+ 2500 4x4 47re


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40 minutes ago, JAG1 said:

Fass has been known to fail very soon after install. We have a recent situation that took out a new VP44. It happened to a truck Michael Nelson has on in his yard now

If this is so why are electric lift pumps recommended to everyone.... I'm so glad I listened to no one and went mechanical... sorry mate but anything electric I can bin the better :thumb1:

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I had similar problem, thought it was vp, between changing injectors, cleaning up wiring, rebuilding alternator (can just replace with a good unit) my surging went away and later I did the WT mod and

I've gotta ask does this cut out occur also with cruise set? I got to know are you manual transmission with fly by wire cruise or automatic with vacuum cruise? What I like to see if your manual if cru

Which is possible too but typically when a VP44 go funny there is codes with it. Hence why I asking for pin to pin ohm test between the ECM and VP44. If the wiring is all checking out then you got to

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1 minute ago, wil440 said:

If this is so why are electric lift pumps recommended to everyone.... I'm so glad I listened to no one and went mechanical... sorry mate but anything electric I can bin the better :thumb1:

Only Fass is developing as unreliable as compared to others such as Raptor or Air Dog which are doing okay in spite of some issues. Like anything in life everything has some degree of disadvantage and advantage. Problem is you guys with the mechanical lift pumps always try throwing us lectric pump guys under the bus...... well ain't going to happen here... me put on armor plate and for Wil440 you only need 1/16th thick shield and a high idle stick to fight back, lol.

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