No fuel pump pressure/bad wiring

Asked by Feb 27, 2016 at 09:43 AM about the 1988 Ford Mustang GT

Question type: Maintenance & Repair

Just bought a 1988 Foxbody Mustang GT,
8.0 and it was sitting for about three years
before I bought it. It has bad wiring, just put
in two new plugs, worked the old gas out,
and the battery keeps a good charge. It
seems to have a vacuum leak but it doesn't
seem to have even 5 lbs of pressure in the
fuel pump system. This causes it to shift
and jump. Is my problem a vacuum leak or
something else?

2 Answers

98,545

You showed a 8 liter motor, is this some kind of custom job? 5 lbs of fuel pressure will not feed a 8 liter motor for long, Might work for an idle but that's it. Get the wiring fixed first, you could be loosing voltage the pumps and who knows what else. Then tackle the vacuum leaks.

Can a truck run if the fuel pump is not seated just right what I mean is if the fuel pump is only half way on the metal mount and not all the way down.

Your Answer

Ford Mustang Experts

  • #1
    Tom Demyan
    Reputation
    4,540
  • #2
    Bob Beaman
    Reputation
    1,250
  • #3
    COMETGUY61
    Reputation
    1,090
View All

Related Models For Sale

Used Chevrolet Camaro
400 Great Deals out of 31,721 listings starting at $2,395
Used Dodge Charger
423 Great Deals out of 27,560 listings starting at $1,650
Used Chevrolet Corvette
234 Great Deals out of 22,105 listings starting at $2,500
Used Ford F-150
2,125 Great Deals out of 181,858 listings starting at $1,000
Used BMW 3 Series
1,013 Great Deals out of 31,214 listings starting at $1,000
Used Jeep Wrangler
264 Great Deals out of 15,736 listings starting at $2,997
Used Honda Civic
788 Great Deals out of 76,969 listings starting at $888
Used Honda Accord
1,032 Great Deals out of 61,576 listings starting at $999

Used Cars For Sale

2017 Ford Mustang GT For Sale
4 Great Deals out of 4,334 listings starting at $25,900
2016 Ford Mustang GT For Sale
3 Great Deals out of 571 listings starting at $23,995
2015 Ford Mustang GT For Sale
4 Great Deals out of 602 listings starting at $21,500
2014 Ford Mustang GT For Sale
5 Great Deals out of 449 listings starting at $14,875

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.