DMC Houston Fuel pump failure.

[DaraSue]

Try replacing the fuel cap.

Oh yeah, I did that too a few years back but maybe it's time for a new one.

[FABombjoy]

You sir are playing with fire. I would hate to see a stock internal prv go lean under load over 160kpa. If you question it at all in your application it should be gone.

Well.. at least I do have AFR safety engaged with a pretty tight leash.

Also have an NOS fuel gauge on loan so I can design/program my own take on an off the shelf module.

Maybe I got a Wednesday pump LOL

[andi1086]

Hi, guys,
this discussion about a broken houston fuel pump made me think a lot, because i have this system too and i don't know exactly how old it is. so far it worked fine - knock on wood :-)
i make regular trips and we also go on vacation with the delorean. next year we want to go to belfast for our 40th anniversary meeting.
has anyone ever used the replacement pump 107085 REPLACEMENT FUEL PUMP FOR 107000 and the special tool to save this unit. the tool has a deposit of 50 dollars. i would have to buy it additionally.
you will need additional filters and new fuel lines too.
I'm thinking about buying it as a replacement for the road.
alternatively i would choose the deplphi fg0089 and have to buy a new original tank fuel sender or the new electronics from dave to get the gauge working.
if someone has a better and simple idea or alternative please let me know.
stay healthy and take care
greetings from germany
andi

[DMC-81]

Hi, guys,
this discussion about a broken houston fuel pump made me think a lot, because i have this system too and i don't know exactly how old it is. so far it worked fine - knock on wood :-)
i make regular trips and we also go on vacation with the delorean. next year we want to go to belfast for our 40th anniversary meeting.
has anyone ever used the replacement pump 107085 REPLACEMENT FUEL PUMP FOR 107000 and the special tool to save this unit. the tool has a deposit of 50 dollars. i would have to buy it additionally.
you will need additional filters and new fuel lines too.
I'm thinking about buying it as a replacement for the road.
alternatively i would choose the deplphi fg0089 and have to buy a new original tank fuel sender or the new electronics from dave to get the gauge working.
if someone has a better and simple idea or alternative please let me know.
stay healthy and take care
greetings from germany
andi

Hi. My understanding is that is a good replacement pump for the unit. Very importantly, it has the correct high flow rate. Be sure to get the filter (107643) unless it is included with the pump.

The pliers are meant to be returned to DMC as a borrowing program. That's why there is a core charge. You can ask about a direct purchase, or perhaps purchase a set elsewhere.

What I would do if you are concerned about failure of the module, is, on let's say an annual or biennial basis, remove the module, take the bottom cover off, and check / replace the filter. It is $8. You can also check that the electrical connector is still securely fastened to the pump module and any signs of heating/melting like happens on fuse 7.

In my opinion, the majority of these failure stories are caused by a clogged filter, incorrect application, or some other issue (like our common electrical issues).

Although this is an adapted GM module, the DMC version is a unique application to the DeLorean. The pump flow rates are designed for K-Jet, for example, it is a higher flow rate. If it is clogged or installed in an application that has a lower return rate, the pump fails either mechanically or electrically (fluid dynamics).

Because of the high flow rate, the fact that all pumps need surrounding fuel to cool them, and the characteristic fuel heating problem in our cars, I try to maintain as full of a tank as possible.

I have this module, and the regular inspection of the filter, and tank level monitoring is my maintenance program/fail safe.

I know that this is a hot topic in the community, but these are my thoughts and my experience.

[mark w]

Hi, guys,
this discussion about a broken houston fuel pump made me think a lot, because i have this system too and i don't know exactly how old it is. so far it worked fine - knock on wood :-)
i make regular trips and we also go on vacation with the delorean. next year we want to go to belfast for our 40th anniversary meeting.
has anyone ever used the replacement pump 107085 REPLACEMENT FUEL PUMP FOR 107000 and the special tool to save this unit. the tool has a deposit of 50 dollars. i would have to buy it additionally.
you will need additional filters and new fuel lines too.
I'm thinking about buying it as a replacement for the road.
alternatively i would choose the deplphi fg0089 and have to buy a new original tank fuel sender or the new electronics from dave to get the gauge working.
if someone has a better and simple idea or alternative please let me know.
stay healthy and take care
greetings from germany
andi

My DMCH pump has never been an issue, but it now seems not to run after sitting dry for 2 years. considering replacing the pump itself inside the module. part 107085. Does anyone know how to disassemble the module to get the actual pump out? any youtube video? I could not find, only videos about replacing the old style with the new style.

[mark w]

My DMCH pump has never been an issue, but it now seems not to run after sitting dry for 2 years. considering replacing the pump itself inside the module. part 107085. Does anyone know how to disassemble the module to get the actual pump out? any youtube video? I could not find, only videos about replacing the old style with the new style.

I got the pump working. it was just needing Fuel and a good soaking to loosen it up. I ran it out of the tank and in a bucket and got some gunk/debris out as well.

Mark

[WHO1DMC]

I got the pump working. it was just needing Fuel and a good soaking to loosen it up. I ran it out of the tank and in a bucket and got some gunk/debris out as well.

Mark

In case you need it in the future I found this video that may help.

https://youtu.be/jjNbiR2U6ws?si=3owmyYYjd_-Qto1n






Dave B.