Deloreango fuel pump didn't make it 50 miles.

[Michael]

Last night my wife and I took the car out for it's first real world cruise after a ton of work over the winter. 30 minutes in and I heard my brand new fuel pump singing the familiar song of being hot.

It's a brand new pump from DeLoreanGo, new filter too. I also insulated the tank from the coolant lines that run down the sides and insulated the front from hot air using thermo barrier. Tonight was a mere 75-80 degrees and a relatively short cruise. If this pump gets hot under these conditions, what chance does it have when summer gets here???

To be fair, it wasn't a loud hum, but definitely loud enough to make me feel uncomfortable, changing pitch every so often too. I went and filled the tank up with my go to ethanol free gas, the owner pulled up and we ended up chatting for an hour or so. That and cool gas got me home.

Still though, this pump didn't even have 50 miles on it before it overheated on a mild night! I would love an OE pump that is as good as the Bosch units were before their quality went to pot. The new DMCH pump is out of stock but I have heard stories of that pump being troublesome as well.

Bottom line, I need a fuel pump that works and at this point I don't care if it's OE style or not. I just want it to work when ambient temps reach 150 degrees. Someone sell me a pump that works.

[Bitsyncmaster]

This is the thread on the pump I installed. So far no problems but I have not made any long drives yet. I did do full testing of pressure and flow with great results. I also ran a very accurate fuel level sender test.

The problem with this pump is the mounting is offset from the pump itself so I had to pull the pump off it's original mount locations and rotate the pump (extra holes already exist) to make it sit directly under the tank opening.

http://dmctalk.org/showthread.php?17160-V-band-clamp-for-GM-fuel-pump

[dmcnc]

^I've ran the same pump as Dave for 20k miles (including a cross country trip) - and it runs great. It's also significantly quieter. I also turned the baffle piece under the cover by disconnecting the two connecting rods, but I only turned it and reinserted. I didn't have to disconnect the fuel lines, so it should be pretty straight forward.

[CFI]

I’m running a Delphi FG0089. Picked it up on sale at a local Advanced Auto. Easy job, with a minor modification needed (removing a small plastic tab). Now, to be perfectly honest my closing plate doesn’t fit quite right....but I’m ok with that. I’ve put several thousand trouble free miles on it, including some 90+degree days stuck in traffic.

Easy install, zero problems, limited lifetime warranty, made by an OE supplier, sold by the largest aftermarket automotive supplier in the US, available locally, and if you do go on a road trip and it fails there are approx 4,000 Advanced Auto stores in the US so you’re bound to find one close by.

To complete the job you’ll need to purchase the fuel pump clamp that DMCH sells, two fuel injection hose clamps, and two fuel quick disconnects: 1/4 barb to 5/16, and 1/4 barb to 6/16, which I purchased on Amazon (the barb tip starts at 1/4 and increases to 5/16 so it fits snuggly).

[jamesrguk]

A lot of the heat in the fuel tank is probably because 95+% of the fuel being sent to the hot engine goes straight back to the tank and continuously cycles around the engine and tank.

J

Sent from my SM-G920F using Tapatalk

[Bitsyncmaster]

A lot of the heat in the fuel tank is probably because 95+% of the fuel being sent to the hot engine goes straight back to the tank and continuously cycles around the engine and tank.

J

That's what I concluded from my testing. I've though about using a controller on the fuel pump to reduce that fuel returned to the tank. Basically it would use a pressure sensor to reduce the pump RPM when pressure gets to high. You still get returned fuel of the frequency valve.

[dmcnc]

I imagine it would also reduce amp draw and help with pump longevity?


That's what I concluded from my testing. I've though about using a controller on the fuel pump to reduce that fuel returned to the tank. Basically it would use a pressure sensor to reduce the pump RPM when pressure gets to high. You still get returned fuel of the frequency valve.

[ssdelorean]

Could it be a bad batch of pumps or is there something else wrong in our car? I have a DMCGo pump and just over 2k miles now. No issues.

(Edit Added)
How's the pickup hose? That is the other derelict item in the tank that can collapse and whine. I put the one with the spring in it last time I was in there changing the pump.

[David T]

Heat didn't kill that pump, not in 50 miles! You must have gotten a hold of a defective one. With many parts being manufactured in China it should not be a surprise. Even the Bosch parts are not made in Germany anymore and the quality is not what it used to be.

[Drive Stainless]

I’m running a Delphi FG0089. Picked it up on sale at a local Advanced Auto. Easy job, with a minor modification needed (removing a small plastic tab). Now, to be perfectly honest my closing plate doesn’t fit quite right....but I’m ok with that. I’ve put several thousand trouble free miles on it, including some 90+degree days stuck in traffic.

Easy install, zero problems, limited lifetime warranty, made by an OE supplier, sold by the largest aftermarket automotive supplier in the US, available locally, and if you do go on a road trip and it fails there are approx 4,000 Advanced Auto stores in the US so you’re bound to find one close by.

To complete the job you’ll need to purchase the fuel pump clamp that DMCH sells, two fuel injection hose clamps, and two fuel quick disconnects: 1/4 barb to 5/16, and 1/4 barb to 6/16, which I purchased on Amazon (the barb tip starts at 1/4 and increases to 5/16 so it fits snuggly).



I have the same pump and it's been great for me, too. It was also an in-stock item at Advance Auto Parts.

[CFI]

I have the same pump and it's been great for me, too. It was also an in-stock item at Advance Auto Parts.

Nice! I’ve been very happy with mine.

[Michael]

I guess I am just going to try a Delphi oe or Bosch oe and try to source it locally (or at least have it sent to a nearby Advance). This one is pure junk(didn't even come in a box, it was in a zip lock bag so I have no idea who made it...I have a good idea actually).

[Josh]

Tahoe pump as mentioned in this thread is the way to go. Been running mine since my DMCH combo unit piled up.

[BABIS]

That's what I concluded from my testing. I've though about using a controller on the fuel pump to reduce that fuel returned to the tank. Basically it would use a pressure sensor to reduce the pump RPM when pressure gets to high. You still get returned fuel of the frequency valve.

maybe this could do the job: https://aeromotiveinc.com/product/billet-fuel-pump-speed-controller/

[Michael]

maybe this could do the job: https://aeromotiveinc.com/product/billet-fuel-pump-speed-controller/

That seems needlessly over complicated. I'm going to order Josh's fuel pump assembly without sensor (I actually don't mind the oe sensor). I know if I did the leg work I could probably save a few bucks but I would prefer to have all the right parts from Delorean Industries who has an actual intrest in the marque.

[Michael]

Enough if this oe pump configuration cheap Chinese crap overheating BS.

FIXED!

63358

[Drive Stainless]

Enough if this oe pump configuration cheap Chinese crap overheating BS.

FIXED!

63358

Too clean. FAKE!


Sent from my iPhone using Tapatalk

[CFI]

Enough if this oe pump configuration cheap Chinese crap overheating BS.

FIXED!

63358

Nice! Which one did you go with?

[Michael]

Nice! Which one did you go with?

I used Josh's (DeLorean Industries) pump setup without the fuel level sensor. I never had any issue with fuel level readings with the stock sender because I am old enough to look at a 1/8 gauge and stop for gas without needing to get it down to 20 miles range before I decide to fill up.

He also sends EVERYTHING needed. Nice lines with 2 options (4 lines total), beefy check valve and AN hardware, tank seal and clamp, along with a new fuel filter.

63359

[dmcnc]

That definitely looks like a fire and forget setup. Very nice!

[Ron]

Now put a small piece of 3/8" wood on top of it, screw the top of the cover down, and whip out your heat gun...

[Michael]

Now put a small piece of 3/8" wood on top of it, screw the top of the cover down, and whip out your heat gun...

I probably would go that route had I thought about it but I cut a hole in the cover to male clearance. It's not too bad as it gives me a window to visually check for leaks without removing the cover.

[Bitsyncmaster]

Now put a small piece of 3/8" wood on top of it, screw the top of the cover down, and whip out your heat gun...

I don't think you can soften the cover enough to make it fit.

[dmcnc]

I had no issues installing this style pump. I do have 1/8" thick foam between the cover and the tub as a seal so that helps, but the pump should collapse low enough if you put some weight over the center (I used my foot), to where the cover will fit and close over the pump without any other modification.

[Ron]

I don't think you can soften the cover enough to make it fit.
It will, assuming that the DPI pump isn't much higher than the DMCH new style pump (2 years ago). I think they are about the same though.

I put two in w/o any problems. But when I put one in my own car a year later, it was 1/2" too high. I read that they had changed to yet another pump (check valve problems/?) and I called Dave at DMCMW. He said he had seen similar on 10% (iirc) of the cars. [...I remember posting about this now.]

Anyway, after doing others, the easiest way I found was to screw the top of the cover down, weigh the bottom toward the front with a steel block, and wave the gun close to where it hits, but in a circle eight. (I had two small Phillips head screwdrivers through the front screw holes to guide it, but really didn't need them.) Main thing is to apply constant pressure (use a weight) on it, keep moving the gun, and be very patient!
(A piece of wood 3/8" x ~3" dia. sat in place nicely for me. But I believe 1/4" would be plenty for most cars with the problem.)

[Josh]

I used Josh's (DeLorean Industries) pump setup without the fuel level sensor. I never had any issue with fuel level readings with the stock sender because I am old enough to look at a 1/8 gauge and stop for gas without needing to get it down to 20 miles range before I decide to fill up.

He also sends EVERYTHING needed. Nice lines with 2 options (4 lines total), beefy check valve and AN hardware, tank seal and clamp, along with a new fuel filter.

63359

Looks like the tahoe pump we were recommending.

Nice thing is it comes with everything you need. And has proper crimped and assembled hoses, not the cheesy clamp on ends and bulk hose deal DMC sends out.

[JAZ_DMC]

I used Josh's (DeLorean Industries) pump setup without the fuel level sensor. I never had any issue with fuel level readings with the stock sender because I am old enough to look at a 1/8 gauge and stop for gas without needing to get it down to 20 miles range before I decide to fill up.

He also sends EVERYTHING needed. Nice lines with 2 options (4 lines total), beefy check valve and AN hardware, tank seal and clamp, along with a new fuel filter.

63359

I’ve been researching fuel pumps, and this post was very helpful. Thanks for the picture!

[DMCVegas]

That's what I concluded from my testing. I've though about using a controller on the fuel pump to reduce that fuel returned to the tank. Basically it would use a pressure sensor to reduce the pump RPM when pressure gets to high. You still get returned fuel of the frequency valve.

Several feet of tubing should be enough to eliminate any excess heat. Out of curiosity, have you accounted for the two 200°F± coolant pipes that run right next to the fuel cell?

Is there also a measurement of specific coolant temperature, or just a buzzing of the fuel pump? Otherwise you might be looking at a defective carbon canister.

[Bitsyncmaster]

Several feet of tubing should be enough to eliminate any excess heat. Out of curiosity, have you accounted for the two 200°F± coolant pipes that run right next to the fuel cell?

Is there also a measurement of specific coolant temperature, or just a buzzing of the fuel pump? Otherwise you might be looking at a defective carbon canister.

I've not done any measurements of the effect of the coolant pipes running next to the tank. Since the return fuel is pretty solid one degree warmer than the supply fuel, I think that is the major cause of gas tank fuel heating.

I seem to remember when the return fuel goes above 125 deg. F my fuel pump would start buzzing. I did wrap the AC accumulator with copper pipe which cooled the return fuel and that fix made me never hear the buzzing again. But I've since replaced the pump with a Tahoe type.

[dmcman73]

Looks like the tahoe pump we were recommending.

Nice thing is it comes with everything you need. And has proper crimped and assembled hoses, not the cheesy clamp on ends and bulk hose deal DMC sends out.

I agree about the hoses. When I purchased my aftermarket Tahoe pump, I used standard nylon fuel lines for the pump.

[chris williams]

Enough if this oe pump configuration cheap Chinese crap overheating BS.

FIXED!

63358
Very nice, can you post a link please as I could not find it on the website.

Chris

[Josh]

Very nice, can you post a link please as I could not find it on the website.

Chris

If you intend on using your stock sender:
https://deloreanindustries.com/1-fuel-pump-updated-w-divorced-sender/

If you want an integrated sender, just like the DMCH setup. A little more money but the quality is not even comparable. Dave Mckeen designed circuit board, quality hoses, quality pump.
https://deloreanindustries.com/delorean-fuel-pump-kit-updated-divorced-sender/

[chris williams]

If you intend on using your stock sender:
https://deloreanindustries.com/1-fuel-pump-updated-w-divorced-sender/

If you want an integrated sender, just like the DMCH setup. A little more money but the quality is not even comparable. Dave Mckeen designed circuit board, quality hoses, quality pump.
https://deloreanindustries.com/delorean-fuel-pump-kit-updated-divorced-sender/
Thanks Josh