Engine/Transmission (1998.5 - 2002) Geno's Lift pump relocation kit

[JHudson]

Just wondering if anyone can help with some questions. Presently my lift pump is 12 pounds at idle , but will draw down to 9 pounds at cruise and at wot down to 6 pounds. This is the original lift pump with 57,000 miles on it.



I have a new lift pump on the bench and wondering if I could leave the original one in place and mount the new pump back by the tank. This would I think aide the original pump. As to wiring, will tapping the feed wire to the original pump be enough amperage to power the new pump also or would it be best to tap the original wire to run a relay and then fire the new pump with 12 volts directly from the battery? What kind of pressure would I expect?



Or... . would it be best to just relocate the pump with the Geno kit and run only one pump? (the new one)



Or... . just replace the original pump with the new pump in the stock position and again only one pump?



Thanks for any help,



Jay

 

[JKinney]

There was such a thread today involving an intank pump with a lift pump they were using a relay

 

[keimmmo]

I did exactly what you are proposing when the truck was fairly new. I had over 30 psi of pressure at idle and I think it was like 25 at cruise. It was great... until I developed a hot starting problem!



I removed the pump on the motor and ran only the relocated pump in front of the fuel tank. The hot start problem went away. Fuel pressure was not great, but acceptable.



I later changed all the fittings in the fuel system eliminating the banjo bolts and replacing them with drilled out (for flow) straight fittings. I now idle at 14 psi and cruise at around 12... never below 10 at WOT. When I drop down near sea level, all numbers go up 2 psi. I have over 60k miles on the present lift pump and it is working fine.



I do not recommend using two factory pumps together. You will probably have problems down the road. I REALLY recommend relocating the pump and running big lines and fittings!!!



Steve Keim

 

[Fogie]

A better kit would be the Vulcan Big Line Kit. http://www.vulcanperformance.com . Eric is great to work with and you'll have 1/2 hose all the way to the IP. You could probably use the old pump and see an increase in pressure. That way the new one is in reserve when it is really needed, or you could install the new one and save the old one for just in case. From other threads it is said by Brian at Industrial Injection that the IP (VP44) should have 13. 5 psi. Another option is to leave the LP in position and install a Carter 4600 on the frame in front of the tank. It runs at about 7 psi. Would be a good option. There have been several guys that have done that and done very well.

 

[GCULP]

Jay, I am doing the same thing this weekend but with the vulcan big line kit, I am keeping my original pump that is currently 13. 5 psi at idle, 11 at cruise and 8 wot as a spare since it's still good, plan will be to carry it in the travel trailer with enough tools for a roadside swap if needed. then replace it with a new one when I get home.



also, the geno's kit is a vulcan kit, just 3/8" hose from the relocated pump to the filter, you may or may not notice a pressure increase, but the piece of mind knowing the pump is working easier is worth it, next upgrade would be the big line kit, comes with a relocate bracket as well, but oh well.

 

[keimmmo]

The BIG pressure improvement comes from replacing the factory line and fittings between the filter and VP. It is only 1/4 inch ID!!! I made my changes in stages with a few days between steps. Better flowing lines and fittings from the relocated pump helped very little. But, replacing the line to the VP made a MAJOR difference!!!



Steve Keim

 

[keimmmo]

Afterthought... A pusher pump is just another thing that can fail. Yes, it will give more pressure at the VP, which is good up to certain limits. However, big lines and fittings are pretty well a permanent modification with nothing to maintain... and cost less than a pusher pump in the first place.



Steve Keim

 

[JHudson]

Thank everyone,



It seems to me that the best option would be to relocate with the big line vulcan kit. I will use my new pump and save the old one as a spare.



Jay

 

[GCULP]

Jay, just finished my big line install and relocation, what a difference, I gained 1. 5 psi at idle and the pressure loss at wot is minimal, that's with a stock pump.

 

[JHudson]

Gary, Since I had already ordered from Geno's their relocation kit, and it arrived on Saturday, instead of returning it and ordered the big line vulcan kit, I thought I would give it a try. The price was reasonable, so I said what the heck, let see what happens..... Well Geno's has put a very nice kit together. The instructions were clear and detailed, and all parts were nice. The hard part of the install was removal of the old pump. Once this was done, the rest of the install was a piece of cake. Wow, my next pump will be all of 5 minutes to change if needed.



Well with the new pump, fuel pressure was right back where it was when I orignally put the pressure guage on in 2000, 15 idle, 13 at cruise and 11 at WOT. Boy am I happy! I sure hope this new location will make a easier life for the new lift pump, and I get many more years out of it. Nice thing, I have the old one for a spare, and the change out will be a snap if needed. My hat is off to the 3/8" Geno's Vulcan kit, nice work folks.



Jay

 

[JKinney]

Thank everyone,



It seems to me that the best option would be to relocate with the big line vulcan kit. I will use my new pump and save the old one as a spare.



Jay

I read the next post that said you had your pump plumbed and running, but I bet the old pump might have given you the same #s