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Thread: Fuel pump noisy when been in traffic for over an hour

  1. #21
    Tweedledumber DCUK Martin's Avatar
    Join Date:  May 2011

    Location:  DeLorean Cars, UK

    Posts:    581

    Quote Originally Posted by Bitsyncmaster View Post
    You own a TVR? I have sold a few of the "run sensors" for them which is a modification of my RPM relay.
    Fb.com/mys6cerbera

    From the 90s Griffith onward, they're all EFI AFAIK. Pump control on mine is the ECU.
    Martin Gutkowski

    DeLorean Cars (UK)
    www.delorean.co.uk
    Twitter: @deloreancars

  2. #22
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    7,492

    My VIN:    03572

    Quote Originally Posted by DCUK Martin View Post
    Fb.com/mys6cerbera

    From the 90s Griffith onward, they're all EFI AFAIK. Pump control on mine is the ECU.
    Some early ones used Kjet. But the run sensor just controls the fuel pump like our RPM relay does in the D.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  3. #23
    Senior Member
    Join Date:  Aug 2018

    Location:  Virginia

    Posts:    374

    My VIN:    1623

    I was planning on buying an air dam from Hervey, but it looks like his store will be closed for the foreseeable future. Can someone tell me approximately what size the dam is so I can make my own?
    DMCF rebuild 2008, Stage II, Eibach

  4. #24
    AKA "The Goat" Michael's Avatar
    Join Date:  May 2011

    Posts:    3,763

    Quote Originally Posted by CFI View Post
    I was planning on buying an air dam from Hervey, but it looks like his store will be closed for the foreseeable future. Can someone tell me approximately what size the dam is so I can make my own?
    I am planning to do this next time I get my car on a lift. One member here had a working theory that the coolant pipes caused the fuel pump to get hot(by heating the fuel tank and fuel). He dropped his closing plate and attached self adhesive heat barrier to his tank along the coolant pipe areas. Seemed like a good idea to me. I have everything except the time but soon...just in time for winter maybe.

  5. #25
    Member jorge figueroa's Avatar
    Join Date:  Jun 2011

    Location:  Puerto Rico

    Posts:    62

    My VIN:    01279

    solution to the problem of overheating of the pump and the gasoline tank in deloreans.
    Many deloreans including mine have always had this problem of having the gas pump very hot when you make a long trip around Puerto Rico. And in some cases total failure.
    The problem arises from the poor design of the delorean cooling system.
    Especially the tubes that pass under the gas tank. These tubes are heated by the coolant that comes from the engine to the radiator, heating the tank, gasoline and the pump to temperatures too high for its proper functioning.
    As a result you hear a loud buzzing inside the car (pump too hot) and the possibility of failure.

    For some time I was looking for a solution to this problem, and finally found in home depot a type of tape that is used to insulate tubes in the air conditioning system of homes or businesses. (To see photos).
    It is an aluminum tape with high density foam insulation.
    Using my own delorean I did heat transfer tests with one of the cooling system tubes and found that the heat transfer is practically zero.
    With my delorean engine running I put my hand on the coolant pipe with the insulation and felt no heat at all.
    If my hand did not feel any heat the tanks of the deloreans either

    50919550_2178710368851641_4068140409421824000_n.jpg50079597_2178710412184970_8940790960036511744_n.jpg50713257_2178710612184950_943280160864468992_n.jpg50440744_2178710542184957_6044630208093356032_n.jpg

  6. #26
    Senior Member BABIS's Avatar
    Join Date:  Sep 2012

    Posts:    479

    My VIN:    4502

    Quote Originally Posted by jorge figueroa View Post
    solution to the problem of overheating of the pump and the gasoline tank in deloreans.
    Many deloreans including mine have always had this problem of having the gas pump very hot when you make a long trip around Puerto Rico. And in some cases total failure.
    The problem arises from the poor design of the delorean cooling system.
    Especially the tubes that pass under the gas tank. These tubes are heated by the coolant that comes from the engine to the radiator, heating the tank, gasoline and the pump to temperatures too high for its proper functioning.
    As a result you hear a loud buzzing inside the car (pump too hot) and the possibility of failure.

    For some time I was looking for a solution to this problem, and finally found in home depot a type of tape that is used to insulate tubes in the air conditioning system of homes or businesses. (To see photos).
    It is an aluminum tape with high density foam insulation.
    Using my own delorean I did heat transfer tests with one of the cooling system tubes and found that the heat transfer is practically zero.
    With my delorean engine running I put my hand on the coolant pipe with the insulation and felt no heat at all.
    If my hand did not feel any heat the tanks of the deloreans either

    50919550_2178710368851641_4068140409421824000_n.jpg50079597_2178710412184970_8940790960036511744_n.jpg50713257_2178710612184950_943280160864468992_n.jpg50440744_2178710542184957_6044630208093356032_n.jpg
    is the insulation tape applied only to the sides of the tank or even to the coolant pipes?
    VIN 4502

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