Engine/Transmission (1998.5 - 2002) Lift pump going?

[TDaub]

Hello All, last year my gages saved my VP44. I replaced a dying Carter lift pump with the replacement model from Advanced Auto (don't remember brand). Worked great, 15lbs with engine at idle, 11-13 at speed (65mph). lately I've noticed in the morning idle pressure is around 10 and cruising is around 5 (pre and post filter. Is the lift pump going or is it because of the cold?

 

[jkalchik]

You're in Florida. It doesn't get cold down there.



Even at -10 F and below, I'm still showing 8psi or better on mine (and it'll read low due to the air bubble I purposely keep in the hose between the fuel filter adapter and the Westach sensor. )



It might be time to think about either replacing the lift pump, moving the lift pump, or a different pump altogether.

 

[TDaub]

Ok, sounds like it's time to go to the FASS system.

You may consider 13 degrees as being comfortable up there in MN, but for me 95 degrees and 98% humidity is a nice day. ;-)

Thanks.

 

[TDaub]

One more question...
I'm running over sized (75hp) Bosch injectors, should i go with a bigger lift pump? I was thinking about the FASS DDRP, but if I'm going to burn it up in a year like the last 2 a 4 year warranty wont do me any good if I'm broke down waiting for the replacement.

 

[jkalchik]

13 degrees F *IS* comfortable. I sure ain't comfortable in 95 degree 95%RH conditions.

I've got Jammer Stage II tips and a Smarty on my 99. The stock Carter pumped relocated down the the frame rail seems to be able to keep up the flow for the moment. I haven't had the opportunity to do any heavy towing yet, though. I do expect the Carter to die, I'll probably put in the Airtex replacement.

 

[icman95]

I have the FASS 95gph pump and it feeds my 75hp injectors just fine. If I remember, the FASS site gives criteria for ordering the bigger one (150gph) and it says most people will do just fine with the 95.

 

[TDaub]

OK, looks like the FASS 95. I haul a 27' trailer filled with motorcycles, so the extra pressure/flow should be just right.

Thanks Guys,

Shannon

 

[SUrich]

I have the Fass DDRP, 100hp nozzles, comp box and super b turbo. I hold 11 psi at full throttle getting up to speed. The lowest I have seen is 9 while pulling.

 

[SHobbs]

Ok, sounds like it's time to go to the FASS system.



You may consider 13 degrees as being comfortable up there in MN, but for me 95 degrees and 98% humidity is a nice day. ;-)



Thanks.

You got to be kidding. It gets that hot and I hibernate. I have yet to upgrade my L. P. I do have it relocated to the frame rail with 3/8"line all the way to the VP44. So far I have 14psi @ idle and 11psi @ 65mph never below 8 at W. O. T. So far I have only needed two pumps in over 232k miles.