foxbody 5.0

  1. 8

    Engine Rough idle and aggressive sputtering when accelerating

    Hey guys, first-time poster here. I've been troubleshooting my 88 Fox 5.0 for the past few days after randomly my idle became very rough, fluctuating rapidly between 700-900 RPM needle all over the place. In addition, the car shakes and thumps very badly when accelerating at the low end, not as...
  2. S

    Requesting Guidance for 306 motor swap - Fuel? - SD? MAF?

    Hello Everybody, Introduction I've recently picked my project car back up. A 1988 LX 5.0 Mustang that’s been in my family for over 30 years! It was also my first car back in high school (2012), and it holds a lot of sentimental value. Now, I’m aiming to finally complete the build over the next...
  3. S

    Resolved Electric fans

    new to the group with my 89 gt convertible. I just installed new electric fans from LMR . And stumbled across connecting the 12v power when you turn on the key. I know it says connect to the ac wiring but my ac don’t work. Was wondering if yall connected it somewhere else or in the fuse box...
  4. M

    Rear Window Louvers Hatchback

    Has anyone had any experience with adding a rear window louver to their hatchback. Specifically looking at the black aluminum ones sold by CJ Pony Parts. Understand that some may just not like the look but more specifically looking to see if anyone has purchased one, what the quality was like...
  5. J

    Fuel pump help

    I'm not sure if this is the right area to put this thread. But I need some help finding the right pump for my car. Lookin to make about 700 wheel on E85 with my sbf. I've been looking everywhere and need help finding a fuel pump that will support at least 800hp on E85 with a turbo Only reliable...
  6. Y

    Brake swap

    So I’m almost done with my brakes Do I have to gut the proportioning valve? And can I run my brakes without one? Also I was pumping my brakes and no fluid is going down What could be the issue?
  7. D

    Roller rockers with no compression

    I have a 1990 Mustang that I swapped a rebuilt 302 and t5 into, I got gt40p heads and upper and lower intake, got the heads rebuilt and bought some 6.250 length pushrods with some pro form sbf rockers, was cranking the engine over with a wrench to do a spark plug thumb test and the only cylinder...
  8. P

    1987 for Mustang 5.0 Radiator valve? Stem? Sandwich plate? Plug? 2024-12-27

    Hello all! So I found a leak on my 87 stang. I traced it from the ground all the way up by the radiator cap. The little valve stem (Not sure what you call it). It was leaking from that part and slow dripping all the way down the radiator to the rail to the ground. The steel valve has a clamp on...
  9. P

    High idle issue and leaking after running.

    Hello everyone! New to forums or threads. I have a 1987 Ford Mustang 5.0. I bought it a couple years ago and have only fixed the convertible top. The car starts up every time and runs smooth. As of lately, the stang starts up high idle RPMs over 1000 and after 15 to 20 seconds it drops to about...
  10. D

    1985 Mustang GT Battery Wiring and Grounds

    Hi Everyone, I have a 1985 Mustang that at some point was converted to a 1985 Mustang GT 5 speed with a carburetor by the previous owner. The wiring is kind of all over the place and I need some help with the wiring of the battery. Right now the negative wire going from the negative battery...
  11. J_5.0_VERT

    Drivetrain Fox Power Loss While In Gear

    1990 5.0L Manual T5 - Will try to keep this short. Car is effectively “dying while driving” in all gears. Happens randomly at any rpm and speed, feels like the motor is heavy engine breaking mid gear and on the accelerator. Saw the rpm jump up like a blip as it happened this morning. The first...
  12. TonyMano

    Engine My car is missing

    I need some help! View: https://imgur.com/a/jHRUARx
  13. J

    Engine Foxbody coolant getting dirty

    My foxbody mustang has been sitting for a long time and about 3 years ago I got it redone meaning re sealed the entire motor, since then the car has been over heating because the coolant kept getting dirty and I made sure it’s not oil it’s just mud or dirt, I’ve replaced the thermostat from a...
  14. foxbodyclark

    Help! Intake Manifold Gasket or Head Gasket?

    Hoping for some expertise and advice (long post, read all for context) A couple weeks ago I redid the intake manifold gaskets, valve cover gaskets, thermostat, fresh fluid in the radiator etc. If it was there, I did it (minus anything head related) I didn't have any overheating issues prior to...
  15. Mac131

    Progress Thread 1993 LX Hatch Progress

    Hey all, New Foxbody Owner...picked up this 93 LX a couple weeks ago. It had previously been loved and enjoyed but has been sitting for the past 5 years or so. All panels are numbers matching with original paint (minus front bumper cover paint). On it's way home... Issues and progress so...
  16. L

    90 Fox-Megasquirt Difficult start (stock engine)

    Hi everyone. I am new to the forum and happy to be here. My 90 foxbody, which I bought new in May of 1990, is still in good shape and still has the stock motor with no modifications. Just about a daily driver. That said, a few weeks ago I purchased a megsquirt PNP-2 (MS) and decided to give...
  17. J

    Forced Induction Turbo SBF Fuel system RECOMMENDATION

    Hello everyone! I picked up a turbo for my SBF 347 stroker setup on a 1989 LX Foxbody. It's a single 76/74mm (I believe) Precision Turbo, 2x. 45mm Turbosmart wastegates & 1x. 50mm Turbosmart BoV. I have a built motor with a standalone tunable ecu but its lacking a fuel system. It currently has...
  18. Jonatan Issa

    Foxbody

    Yesterday my 93 fox was running like it has no fuel and it has fuel. Today was when I drive it was all good. The first day I buy it did the same thing
  19. Jonatan Issa

    Overheating

    my 1993 Mustang these last days after 10-15 minutes the temperature begin to rise, normally stay below half The fan clutch was changed when buy it because was overheating And the I think the thermostat is opening I took this picture inside the rad that’s don’t look normal
  20. S

    Foxbody steering wheel

    I’m looking for ideas on what type of steering wheel to get. I’d like to find one that will fit in my 88 Fox that has radio controls. Newer cars have way nicer wheels aesthetically and feel. There might not be anything that I can use that has radio controls already built in. I can figure out the...
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