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VP44 Poll

flman
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flman

flman

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Posted

I put a poll in CF, so I could get maximum response about our VP44s. Any ways a subscriber from Texas made this claim: "Hey give it a try. I am going to keep using the stock pumps though. They have worked for me so far! I have changed it out like 4 times now. But I just changed it when they quit filling the filter housing up during fuel filter changes. I need to get a gauge though." :rolleyes::rolleyes::rolleyes: So go to the poll and see if cold weather has any correlation because of poor fuel delivery, and the condensation that goes with it. http://www.cumminsforum.com/forum/98-5-02-powertrain/239995-vp44-failures-north-vs-south.html

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Mopar1973Man

Mopar1973Man

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What about the grid heater robbing voltage from the electronics and the lift pump?

No problem here so it drops from 17.5 to 16.5 PSI when the grid heater hit... The noly time the electronic is a issues is if the voltage falls below 8 Volts... I'm still in the 11-12 Volt range on my weakest voltage. My batteries are even stock orignals that are 8 years old now... No problem here now because of the anti-gel package in the fuel I tend to keep using the 2 cycle oil... post-2-138698163344_thumb.jpg
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flman

flman

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My volts are at 11.7 at first start, and quickly go to 14 within 15 seconds. I was concerned about voltage drop in the electronics, more then the pump. Not worried about the VP44 over heating when 1st started. I guess we need to give the poll a week, to get enough responses. Only 5 Southern votes so far.

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DavidC

DavidC

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I voted in your poll and posted on CF. Just thought I would post here also.I live in south Texas and have never had a VP44 failure. I bought my truck September 1, 2001 with 12 miles on the clock. I now have 205,483 miles on her. First stock lift pump replaced at 127,000 miles (don't know how long it was out). Installed Airdog at 192,000 miles. Started 2 stroke diet at 198,000 miles. Still going strong. (runs a 15.1 second quarter mile!)I know my story is not typical, but I don't mind bragging!

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cmns2500

cmns2500

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Typical grid heater load... The grid heater suck out 190 Amps worth of power and the alternator is only 120 Amps typically so it tends to dim and discharge the system... I'm like Flman just about a 1 PSI drop...

my alt. is the upgraded 160 and fl, you got some big damn batteries man...our stockers are like 700 each i think
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flman

flman

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By his sig, I would assume the OP is running the stocker pump? Maybe he should get a voltage check at first start with a multi meter at the batteries? I am not sure if the Ram has a decent gauge in dash or not. Mine has an info center, not the greatest but it gives accurate LCD voltage measurements, hours run times, ABS and Engine DTCs.

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edcasey

edcasey

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I never realized fuel pressure drops with the grid heaters on. It certainly make sense that an electric pump would have less output at a lower voltage. My pressure is always at 15.5 psi at idle whether the grid heaters are on or not. I'm sure there is a drop in pump output pressure but my bypass valve always keeps fuel system pressure at 15.5. I'm really surprised the AirDog's have any drop in pressure. Don't they use a similar spring regulator to control pressure?

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MoparFreak1988

MoparFreak1988

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Off topic I do live in Wisconsin and often see negative temps through out the winter and am yet to have a problem with my stock lift pump which has been replaced once and to my knowledge the vp44 is original i got the truck at 120,000 and acording to the dodge dealer the lift pump was just replaced and the vp was original I just started the two stroke oil diet about 10-15 thousand ago and my two questions are how long do i have before they dump and aparently this is unusual that they last this long? Im just starting the proccess of instaling my fuel pressure gauge so i'll post again since im curious of my actual pressure and the drop I get when my heaters cycle with the stock lift pump...

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