how do I troubleshoot a fuel problem for a 79 mgb? I replaced the fuel pump but not getting fuel out of the tank to the carb-I have 4-5 gal of fuel in the tank

Asked by Aug 17, 2012 at 12:36 PM about the 1979 MG MGB

Question type: Maintenance & Repair

I seem to  but be getting power to the pump but if I disconnect the line out of the pump no fuel comes out when I try to start. The tank, sending unit, pump, fuel lines from tank and gas is new.

1 Answer

5,505

Test the pump off the car to make sure it's working, you should be able to hear it ticking when you hook it up to the power and it should provide low pressure fuel flow. If it's not pumping you might want to check the points on the pump (if you have the original SU pump that is) and check the polarity (SU pumps come in positive and negative earth). Next make sure the in and out lines are hooked up to the pump correctly or you might be pumping the fuel back into the tank. Apply vacuum to the fuel pipe and make sure you get fuel through the sending unit feed pipe.

1 of 1 people found this helpful.

Your Answer

MG MGB Experts

  • #1
    Larry Sturgis
    Reputation
    90
  • #2
    wb6epp
    Reputation
    70
  • #3
    Lars Cats
    Reputation
    60
View All

Related Models For Sale

Used MG MGB Roadster
11 listings
Used Chevrolet Corvette
110 Great Deals out of 16,065 listings starting at $3,000
Used Chevrolet Camaro
481 Great Deals out of 31,030 listings starting at $3,495
Used Porsche 911
138 Great Deals out of 5,263 listings starting at $12,984
Used Ford Mustang
432 Great Deals out of 42,904 listings starting at $1,488
Used MG Midget
8 listings
Used Volkswagen Beetle
222 Great Deals out of 9,600 listings starting at $1,277
Used Triumph Spitfire
11 listings

Used Cars For Sale

1980 MG MGB For Sale
11 listings
1979 MG MGB For Sale
12 listings

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.