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You guys think my fuel pressure low???


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my fuel PSI is 15 Idle 11-13 WOT..meaning on a hard pull it may pull to 11psi for 2-seconds if i get on the pedal hard like to pass something then it snaps to 13psi..I lost a 1-2lbs when i replaced my Fuel/Water seperator w/ the AirDog updated one, .."which is a Luber-Finer' FILTER and i was able to get the # for from "STANDARD LABATORIES" If any one wants it

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my fuel PSI is 15 Idle 11-13 WOT..meaning on a hard pull it may pull to 11psi for 2-seconds if i get on the pedal hard like to pass something then it snaps to 13psi..I lost a 1-2lbs when i replaced my Fuel/Water seperator w/ the AirDog updated one, .."which is a Luber-Finer' FILTERand i was able to get the # for from "STANDARD LABATORIES" If any one wants it

You can adjust it up a little, your's is adjustable right? I the cooler weather I lost a 1/2-1 PSI. I may do the same on my Raptor.

Dave

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I got the original AD100 - so 15psi and 11 WOT ...... spring is only way to adjust Im pretty sure mike said the return valve opens around 10psi - so makes sense over 10 is where to be ......

Right from the Dodge Factory service Manual... http://articles.mopar1973man.com/index.php?option=com_content&view=article&id=88:bosch-vp44-injection-pump-overflow-valve&catid=25&Itemid=107

The valve opens at approximately 97 kPa (14 psi)

And...

Reduce regulated air pressure to 10 psi and observe valve. Valve should stay shut. If not, replace valve

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Guys..my pressures are 15 idle and 13WOT...the lowest ive seen them drop was 11psi and that is only for a second and then it snaps back to 13+ instantly...

I think its where i dont have the draw straw, im using the 3/8 OEM fitting with the connector that came in the AD 100 KIT

--- Update to the previous post...

MY PRESSURES before i installed the new F/W sep.filter was 16-17 idle and 14WOT..

Guys..my pressures are 15 idle and 13WOT...the lowest ive seen them drop was 11psi and that is only for a second and then it snaps back to 13+ instantly...

I think its where i dont have the draw straw, im using the 3/8 OEM fitting with the connector that came in the AD 100 KIT

--- Update to the previous post...

Mike..if i can find the 17psi spring i orderd w/ the AD im going to try that in the next few days..

You might consider updating to the other spring. (17 PSI)

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if the overflow on the vp opens at 14#psi and your pressure is lower i would say your are not getting all of the cooling for the electronics thats possible. could mean shorter vp life. i think i am keeping mine at or above 15 for that reason.

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if the overflow on the vp opens at 14#psi and your pressure is lower i would say your are not getting all of the cooling for the electronics thats possible. could mean shorter vp life. i think i am keeping mine at or above 15 for that reason.

That may be some of your weeping problem too maybe. Whadoyathink? Dave
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the pressure comming out of the vp to the injectors is in the neighbor hood of 4000#psi so i would not think 20# on the lift pump would cause the weeping.

It starts out at 4,500 PSI and can go as high as 20,000 PSI (or more). As for the weeping it most likely a bad sealing washer... :shrug:
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