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Thread: GQ/Maverick - TB42 electric fuel pump issues.

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    Beginner Mark01's Avatar
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    Question GQ/Maverick - TB42 electric fuel pump issues.

    Just purchased myself a new (old) rig.

    Ford Maverick SWB.
    Petrol and Gas, TB42.

    IMG_1450.jpg

    The previous owner has put in an electric fuel pump as the mechanical one died apparently.
    I can't seem to get it to work however. Ive managed to get it to idle but as soon as i start to drive her
    she dies after like 10 meters.

    I thought maybe the one fuel pump wasnt strong enough so i added another and have had the same result.

    Really lost as to what to do next.

    I doubt the thing has run on petrol for a while so im thinking the carby could have some issues?

    Is there anyway i can adjust the float ?

    Any help would be greatly appreciated.

    Cheers, Mark.

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    Patrol God taslucas's Avatar
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    Is there fuel visible in the filter when it dies? If so then I'd say the pump is pushing enough.
    It's very common for the carbies on these to get a bit sick as they get older and definitely if they've been on gas for any amount of time. Running solely on gas dries out the carby. There are a lot of threads on this subject if you have a little search.
    First off though I'd go around the carby with some crc/wd40 etc and make sure all the linkages, springs etc are lubed up and visually check for any missing vacuum lines etc.

    tappin from tassie
    91 GQ Ti TB42 Wagon/Pertronix 2/Nomad Heavy Duty Auto/33"STTs/2"Springs/Uniden/Stainless Snorkel/Spotties
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    Patrol God taslucas's Avatar
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    Also, these carbies can be temperamental so er on the side of caution before jumping in and adjusting things

    tappin from tassie
    91 GQ Ti TB42 Wagon/Pertronix 2/Nomad Heavy Duty Auto/33"STTs/2"Springs/Uniden/Stainless Snorkel/Spotties
    --TAS--Under Down under--


    Get your forum stickers here!

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    Beginner Mark01's Avatar
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    I've soaked it in some carby cleaner but no real luck. How much fuel do they need to run cause I've pulled the hose off the carby with the fuel pumps and it's nothing extreme just a steady small stream.

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    Patrol God taslucas's Avatar
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    Not sure of the flow rate but I'd say an electric one should have enough flow.

    tappin from tassie
    91 GQ Ti TB42 Wagon/Pertronix 2/Nomad Heavy Duty Auto/33"STTs/2"Springs/Uniden/Stainless Snorkel/Spotties
    --TAS--Under Down under--


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    Beginner Mark01's Avatar
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    How would i go about changing or checking the float level?

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    Sounds like a partially blocked petrol filter.

    Is there a Silver canister near your battery with 2 hoses - try by passing it and see if it makes a difference.

    There is also a gauze filter where the fuel enters the carby
    1991 GQ LWB 4.2 Carby dual fuel, 32 mud claws, 2 inch lift, LSD's front and back

    And its Toooooooo High for the Ball & chain

  9. The Following User Says Thank You to GQ TANK For This Useful Post:

    taslucas (2nd December 2015)

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    Beginner Mark01's Avatar
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    I've bipassed the fuel filter in the engine bay and she seems to be running better.
    Let some wd40 soak over the whole carby overnight and now she runs and drives but cuts out up hills and at higher speeds I think

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    taslucas (2nd December 2015)

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    The RB30's are know for running out of fuel on very steep hills while 4wding - I used to run my MK on LPG a little less power but no loss of power.


    I have had no issues with the TB42 and the carbys are basically the same

    Don't run without the filter for too long as you could end up with a clogged carby
    Last edited by GQ TANK; 9th December 2015 at 02:53 PM.
    1991 GQ LWB 4.2 Carby dual fuel, 32 mud claws, 2 inch lift, LSD's front and back

    And its Toooooooo High for the Ball & chain

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    Patrol Guru Irish's Avatar
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    The dual fuel setup can be hard on the TB42's carby, because the gas runs hot and dry it cooks em over time, might be worth putting a rebuild kit through it.

    What kind of electric fuel pump is it, is it the standard Nissan in-tank one or is it an external type

    Does it still cut out on hills when you are running it on gas or just on petrol?

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