Engine/Transmission (1998.5 - 2002) Got any butter? Cause my vp44 is toast!

[slavallee]

The SM said that yes it was strange that the LP is still flowing at above spec, and admitted that dead LP's are usually what kills the VP44. This seems to be a situation that couldn't have been forecasted with gauges. I'll chalk this one up to gremlins and keep my fingers crossed. Lets hope this is does not become a trend.

 

[CEkstam]

At Ekstam Worldwide we have tested the stock lift pump for the 5. 9 24valve. Static pressure is approximately 18. 5psi. Flowing against a stock VP44 @ 'WOT' it will hold (new) about 7psi (PSI rate given to us by TDR members). When the power to the stock lift pump is cut, it takes about 2 to 4 seconds for the fuel in the line between LP and the VP44 to vaporize. I do mean vaporize to a point of estimated 85% to 90% vapor. I was extremely surprised due to the fact that you can fairly easily blow through the LP. Anyone wishing to see this demonstration can do so by visiting our facility in Jefferson City, MO. or our booth at the Mid America Truck Show, March 25, 26,27, in Louisville, KY. Booth #644.



The same testing was done with the Preporator. Note: the no pressure flow of the FP-135A is approximately 160gph at 13. 8V. The NEW & compact FP-80HP 'AIR DOG' will have the same flow/pressure spec's, only much smaller in size. When tested against the 'WOT' flow of the stock VP44, both models of the Preporator will easily maintain 15psi. The 'AIR DOG' can be seen at the Mid America Truck Show, also!



Should, by chance, the Preporator fail to operate, a bypass check valve instantly opens allowing the unrestricted passage of fuel preventing the sudden pressure flash that causes the instant cavitation. I would add that all Preporators are quality inspected through out the manufacturing process, bench run and completely tested before shipping.



Thanks,



Charlie

 

[Michael Hughes]

csevers: When my VP44 went, the truck was running just fine, no power problems. Did have some problems the day before with starting, but the day it died, it started like normal. I pushed the clutch in to stop at a stop sign and the engine died, that was that. No MIL, but it did set the P0216 code.

 

[slavallee]

Got my baby back today! Don't know if it was the three days of driving an F-150 or perhaps the original VP44 was slowly dying, but now that I have the new pump my truck just seems to scream around town.

Also, not that I trust the trip computer, but it is displaying better mpg that what I was getting before. Perhaps this cloud has a silver lining after all.