1990 Ford Mustang GT Fox Body 5.0

Asked by Shanep1976 Oct 21, 2018 at 01:24 AM about the 1990 Ford Mustang GT Hatchback RWD

Question type: Maintenance & Repair

Hello All,
I have a 1990 mustang gt with. 5.0 302. I just
changed the TFI module and still having the
same issue. Motor cranks but will not fire
when hot. I have good spark and fuel coming
out of the shredder valve. I did not measure
the pressure. I also sprayed stating fluid the
the air cleaner and still not start. When the
motor cools down the motor will start just
fine and drive without issue. Sometimes I
have to floor the throttle and it might start.
The spark plugs seem a bit dry as well. What
are your thought.

4 Answers
10

Jim answered 6 years ago

Sounds to me like low fuel pressure...test for proper fuel pressure if not within specs then replace fuel pump.....

1 people found this helpful.
Mark helpful

Shanep1976 answered 6 years ago

I’ve cleaned the contacts in the distributor and seem to be in great condition. I will check to see what my fuel pressure is at. Should the spec be 40psi?

Mark helpful

Shanep1976 answered 6 years ago

Also my son fired it up this morning like nothing was wrong. This is driving me nuts, not too sure if it’s the coil, fuel, compression or a sensor.

Mark helpful
10

GuruLCNPL answered 5 years ago

Hands down COIL. Not a fuel pump. They don't work then not work. When a coil gets hot they break down internally by resistance. Replace the coil. It will be all good!

1 people found this helpful.
Mark helpful

Your Answer:

Related Questions

  • 1990 Ford Mustang GT Fox Body 5.0 4 Answers

    Hello All, I have a 1990 mustang gt with. 5.0 302. I just changed the TFI module and still having the same issue. Motor cranks but will not fire when hot. I have good spark and fuel coming out of ...

    1990 Ford Mustang GT Hatchback RWD

    -

    Maintenance & Repair

  • 1990 Ford Mustang 5.0 vacuum lines 3 Answers

    I need help, I have a vacuum leak from the intake/throttle body area and the car barely idles and dies.

    1990 Ford Mustang GT Hatchback RWD

    -

    Maintenance & Repair

  • 1995 mustang gt 5.0 3 Answers

    my mustang starts fine when it is running it is pushing way to much fuel out black smoke really rich gas smell and sounds like it has a cam in it but it doesn't. I have changed the distributor put ...

    1995 Ford Mustang GT Coupe RWD

    -

    Maintenance & Repair

  • 2001 Ford Mustang GT 1 Answer

    I have 2001 mustang gt 4.6 it sometimes drops to 700 rpm idle and dies, at 1500 to 2000 rpm driving it cuts in and out and today it took me 15 min to get it started and ran horrible on the way h...

    2001 Ford Mustang GT Convertible RWD

    -

    Maintenance & Repair

  • 1998 ford Mustang gt 1 Answer

    My 98 gt is running hot showing on the guage. I've changed out both temperature sending units, new 2 stage fan, new waterpump, and flushed the radiator, my next option is to by pass the guage and ...

    1998 Ford Mustang GT Coupe RWD

    -

    Maintenance & Repair

Mustang

Looking for a Used Mustang in your area?

CarGurus has 1,365 nationwide Mustang listings starting at $4,995.

Postal Code:

Shortcuts

Search Ford Mustang Questions

CarGurus Experts

  • #1
    Gene Arnett
    Reputation
    3,160
  • #2
    Bob Beaman
    Reputation
    2,690
  • #3
    rst429
    Reputation
    2,650
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Camaro
14 Great Deals out of 282 listings starting at $5,995
Used Chevrolet Corvette
22 Great Deals out of 1,084 listings starting at $15,000
Used Ford F-150
320 Great Deals out of 13,991 listings starting at $1,712
Used BMW 3 Series
64 Great Deals out of 1,232 listings starting at $2,500
Used BMW M3
93 listings starting at $15,995
Used Honda Civic
200 Great Deals out of 4,053 listings starting at $440
Used Toyota Supra
74 listings starting at $49,777
Used Toyota Camry
62 Great Deals out of 1,074 listings starting at $3,500

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. Content will be removed if CarGurus becomes aware that it violates our policies.