I have a few questions. Question, should I install an electric fuel pump, and also remove the mechanical pump? I'm having problems getting fuel, and I just replaced my stock mechanical fuel pump. Has anybody bypassed the stock filter configuration under the hood and know what each sensor does? Does any body live in a cold climate like mine? I live in southern Ontario and am moving to Edmonton, Alberta and am already running into cold weather problem and I live below Michigan.

What I have done to my truck

So far I ran my coolant into my first tank and looped 15' of 1/2" copper inside the tank, then I made a heat exchanger for under the hood made out of coiled 3/8" copper in a 4" pipe with the ends capped and ran coolant in the 4" pipe and bypassed the svo and the diesel into the the 3/8" copper tube copper tube. I added a water removing filter after my diesel tank, ordered a fleetgaurd coolant and electric filter off e-bay, (that is going to be installed next week) I also have a block heater and a magnetic heater under my svo tank and insulated it, wrapped and insulated my coolant and fuel lines together.

I have a 90 and a 93 7.3 and both of them use electric fuel pumps. The diesel pump for a Hummer works really well. You have not had any fun until u try to bleed a system with the mechanical pump. Both electric pumps were put on with brand new mec`hanical pumps as the mechanical pump does not want to do the job. I do live in so florida not in the north.

I have converted a 1987 F250 to run on SVO. What I did was add another tank mounted in the bed,90+ gallons. I am using a "HOTFOX" to heat the oil in the tank and oil feed tube. I'm also using a "VEGTHERM" sold by the same people that sell the "HOTFOX". Look up "ARTIC FOX INC". No I am not employed by them, just use their products with no problems.

Not to hijack an old thread but this turned up in a search. I am looking to replace the Holley red pump on my van and came across the Hummer pump but it's got female metric fittings from what I can tell. Curbill (or anyone using this pump) what fitting is it? Autozone is not real clear on their website but it looks like M16x1.5, is this correct?

quote:

Hummer pump

rs (do you own one )
what is the part number of that pump, or URL so i may look it up.
are you having problems with our stock lift pump or are you just looking to simplify?

I went ahead and bought it since it was only $52 at Azone and was made for the turbodiesel hummer. Look up the one for 1997. I had to use Earls adapter fittings for powersteering from Summit Racing, M16x1.5 to -6AN. I've got a 3/8 aluminum fuel line anyway so it was real easy to hook up. I was on my second Holley pump, both had the motors die after the rotors wore out. Those Holley's are noisy and I never liked them. The first one was an old one I took of my drag car when I built it up. I bought the second because I was in a hurry and figured the old one was just well, old. This Hummer pump is a dream so far. Very quiet compared to the Holley. I used an insulated strap clamp to bolt it to the frame. I ran a whole tank of 50/50 WMO/D2 blend so far with no issues even with temps getting down to the 40's around here at night.

Got the joke BTW, good thing my wife's a hummer fan

Forgot to mention:

Just search the Autozone website for a 1997 Hummer with the turbo diesel.

I put in the Holley to make filter changes easier. When I first started out I was changing filters a lot and with the electric I could purge the air without cranking the engine.

What is the psi rating on the Hummer pump? Do you use a pressure regulator?

I believe the pressure rating is around 13 but don't know for certain. I am not using a regulator. The Holley pumps are 7 PSI. The Hummer's use the same Stanadyne DB2 IP that my van uses although I believe it turns the opposite direction so I am not too concerned with pressure. Besides I suspect the pressure is a little lower trying to pull a heavier blended fuel from the tank as opposed to D2. So far so good. The pluses for me where OEM design, originally for a diesel, for an engine of similar size, available at most parts stores. Heck for the money I'm gonna keep a spare in the cab just in case.

quote:

Originally posted by rsr911:
I believe the pressure rating is around 13 but don't know for certain. I am not using a regulator. The Holley pumps are 7 PSI. The Hummer's use the same Stanadyne DB2 IP that my van uses although I believe it turns the opposite direction so I am not too concerned with pressure. Besides I suspect the pressure is a little lower trying to pull a heavier blended fuel from the tank as opposed to D2. So far so good. The pluses for me where OEM design, originally for a diesel, for an engine of similar size, available at most parts stores. Heck for the money I'm gonna keep a spare in the cab just in case.

In my experience on my IDI a 7psi pump can do 3.5-4.0 psi on 100% WVO and a 10psi gets about 5.5-6.0 psi. At least that's what my Walbro frb 5 and 13 do respectively.