Engine/Transmission (1998.5 - 2002) Pusher lift pump installed - lift pump demon is slain (hopefully)

[TomGolden]

Ok, so it does seem that a 7 PSI pusher pump is enough to keep the fuel pressure at a high level even under WOT acceleration. Thanks for the posting guys, it really makes me feel more confident in going with such a helper pump setup. Now to call either Piers or Enterprise Engine

 

[stevek]

How much is Piers selling his kit for?

 

[Gary - K7GLD]

I scanned thru this complete thread, and may have missed it - but does anyone have the actual Carter part # for the pump being used by Enterprise, and maybe Piers as well?



I tried to get thru to Enterprise by phone this afternoon, but all I got was their answering machine - I might just see what the local auto supply discounters would charge for the pump, and put my own "kit" together...

 

[Rammin]

I have a question, been reading all the lift pump problems and fixes. I just read in the TDR #36 page 41 on the VP-44 does not like high fuel pump preassures. seems to do internal damage. caused by the high peeassure. Also seems the ECM controlls the start up pressure to prevent hard starting.

 

[Big_Daddy_T]

I have recently installed the pusher pump setup(last few days). I love it. The gauge never drops below thirteen psi. Smoke a plenty. I still need to change out the banjos. I have read on multiple posts that anything below 22 psi is no prob for the vp44. 5 psi under startup conditions(thats why I used the relay). Fred Swanson has been very helpful and informative. I would recommend and will use Desert Diesel parts again.

 

[JTroiano]

Carter P4601HP (15-18psi) Carter P4600HP (7psi) Just use a regular audio 30 amp relay. Splice the ground and power wire from your original fuel pump harness and use those to run the relay. I think the relays only draw something like 800 milli amps. Then get a good fuse holder and a 20 amp fuse is working fine for my two pumps. Run that from the battery B+ to the switched side of the relay. and then the other side of the switch part of the relay to the one pusher pump or to the main and the pusher pump. Some people are using the factory main with just the pusher and others are replacing both. I'm suck at trying to be clear. But it is all in my head so feel free to ask any quistions. I got straight A's in shop and F+'s in the english in high school.

Jon T

 

[Steve St.Laurent]

Since there are LOTS of lift pump posts lately I thought I'd bring this back up top - 16 months and 45,000 miles since the install and working perfectly and maintaining no less than 16 psi @ WOT still. First 65,000 miles (actually 37,000 miles since I bought it with 28,000 on it) - 4 lift pumps, last 45,000 miles same lift pumps. This setup has now lasted 5 times longer than any of the stock lift pumps by themselves did.

 

[Larry Willard]

I too am still happy with the Carter pusher pump setup. I never drop below 13 psi after the pusher has been on a little over 6 months and 15000+ miles. The 3rd lift pump was failing when I added the pusher, and has lasted as long as any lift pump alone had previously to this.

Larry

 

[Huff N Puff]

I've been running the identical setup

I mounted my push pump inside the skid plate and a little lower so gravity would feed the pump. The problem is, the pressure pulsations make the pressure gauge buzz,its really loud. You can feel the pulsation in the line to the gauge. I'm sure it can't be good for the gauge. To try to dampen these pulsating harmonics caused by the dual pumps I installed a Racor 690,cause its alot bigger which will absorb some of the pulses and lots of rubber hose to help dampen it seem to help . Please let me know if you have the same problem. By the way the gauge didn't buzz for the first month,I'm sure the pulsating worked the gauge mechanizim loose. Merv

 

[Steve St.Laurent]

My gauge is an electric gauge with senders - the senders are mounted under the hood so I don't have that problem.

 

[Huff N Puff]

You probably will wear out the senders

The violent vibrations will probably wear out the potentiometers in the sending units. If you find yourself going thru sending units it might be worth a try. Merv

 

[Steve St.Laurent]

I've had the senders on the truck working full time for close to 3 years and 80,000 miles - I'm not too worried.

 

[Ncostello]

Steve, I'm glad your setup is proving reliable. It really is a light at the end of a tunnel for once on this issue. Thousands of trouble free miles cant be wrong.



For those using mechanical guages, are they fluid dampened. I am using a glycol filled hydraulic guage (0-30psi) that does not ever make noise or flutter. Its rock steady.

 

[rweis]

There is an interesting fix for the guage pulsation prob on the Aftermarket / Torque thread.



Put in a needle valve before the guage and turn the needle valve all but off, juat so pressure gets through. Basically use the needle valve as the buffer to cut the pulsations from the pump to the gauge. Also has a benefit of minimizing fuel leaks from spurting to dripping should the line to the gauge ever split etc.



Just a thought



Bob

 

[Cliffman]

Replaced OEM Lift pump

I'm running the Enterprise helper pump setup. When I installed the helper pump the 2nd OEM lift pump had about 10k on it but still had 12 PSI at idle. After 50k the OEM lift pump started to fluctuate and at best I went from 20 psi at idle to 17 psi, 15 psi at cruise and 6 psi at WOT. What really concerned me is that it lost 2 psi with in a week and was fluctuating way more than normal. Last Saturday I replaced the OEM lift pump and now I'm back at a steady 20-21 psi at idle, 19 at cruse and 11 at WOT. This is my 3rd OEM lift pump. I'll keep the old one for a backup.

 

[Daddy]

When I tried moving my stock pump to the back the buzzing of the pump drove me nuts and I put it back in the stock location after 2 days. I have a short bed and that puts the pump right about under my seat. Maybe the 7psi pump is quieter than a oem pump. Any input on noise?

 

[Gary - K7GLD]

The 7 psi Carter 4600 is way too loud when the truck is not running - once started, the engine almost completely drowns it out - I tried different mounting schemes, but even when the pump is suspended in mid-air by the fuel line, it's still loud with the engine off and pusher running. I had tried to simply have the pusher run all the time when the ignition was on - no good, too noisy, and hard to get the engine started due to too much fuel pressure - so I ended up letting the stock LP control the added pusher, and all's well now...

 

[Steve St.Laurent]

Lot's of talk about lift pumps lately. 125,000 miles on my truck now. Still running on the same pusher pump and stock lift pump put on at 60,000 with no fuel system related issues. Still seeing a peak of 20 psi and a max drop of 2 PSI at WOT. First 4 lift pumps lasted an average of 15,000 miles. It's actually a LOT less than that because I bought the truck with 24,000 miles on it and didn't know about the lift pump problem for 20,000 miles after that. So I replaced 3 lift pumps in 12,000 miles . Nothing changed on my truck except adding the pusher pump (I did up the power which would have caused more load).

 

[DieselMinded]

B-T-T



Great find steve NExt week (MAYBE ... ... . HAVE TOLD BOSS YET) Im going to EEP to get my kit ----I wonder if our fuel lines are in the same place??



DM



$165. 00 ON THERE SITE GReat Deal if your getting that kind of Fp readings plus you get the PEACE OF MIND of not worring about the Lp. Vp,and break downs

 

[DieselMinded]

VERSION 2



2002 Quad Cab



Short Bed



https://www.turbodieselregister.com/forums/showthread.php?t=120656



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