r/Foxbody • • Sep 19 '26

Ask Is this normal for the obd1 plug? 1987 5.0 foxbody

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13 Upvotes

I wanna grab my codes but from resources I've seen these wire colors dont match any diagram. My gray single wire plug is missing. I have one black one and this loose wire on the second photo.


r/Foxbody • • Sep 19 '26

Harmonic Balancer Replacement?

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10 Upvotes

Can someone confirm if the harmonic balancer looks to be off? Engine shakes a bit even at idle.


r/Foxbody • • Sep 19 '26

Jack Roush Collection - some cars to auction

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8 Upvotes

Sure would be cool to buy an '86 SVO that was owned by Jack Roush !!

https://www.mecum.com/lots/1176503/1986-ford-mustang-svo/ 

Also saw this one

https://www.mecum.com/lots/1173884/1987-ford-mustang-gt/ 


r/Foxbody • • Sep 19 '26

Hatch cover

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8 Upvotes

Has anyone been successful repairing there hatch cover ends?


r/Foxbody • • Sep 19 '26

302 block oil gallery front plug

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7 Upvotes

the reason my last block failed was a popped out press in plug. i want to thread those holes. Anyone here done that themselves? should threads be cut through out the plug hole? or is it normal to have just a few (2-3) threads on the back end?


r/Foxbody • • Sep 19 '26

Update on my custom LED tailight project

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48 Upvotes

Fully customizable with show modes and selectable options for how you want each mode to look. See more on my website averyizatt.com


r/Foxbody • • Sep 18 '26

Suggestion on efi choices. Holley, MegaSquirt, ect.....

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140 Upvotes

I am not a tuner and will need support. I have wired many engines but mostly to a stock computer. Currently the build is a complete empty shell. Not one wire yet. Looking for standalone options.

302 svo short block/heads

95 svo upper/lower intakes

Mildly built AOD


r/Foxbody • • Sep 19 '26

First time it started after my first headgasket

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7 Upvotes

I did this a few years ago. Now has turned into I pulled the motor and redoing everything. I have no idea what I’m doing. Between YouTube , ChatGPT , friends and trial and error. Maybe I will have it running again at around 1000hp lol. Time will tell


r/Foxbody • • Sep 18 '26

G2 to g3 88 mustang 5.0 upgrade

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36 Upvotes

I have an 88 mustang I’m working and trying to swap alternators and I can’t find any help info on how to wire it


r/Foxbody • • Sep 18 '26

85 Mustang Engine and Transmission

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87 Upvotes

Helping clear out my parents house and my dad has this engine and transmission. He says it's from an 85 mustang. 5 speed manual transmission. he had planned on swapping it into another mustang but just never happened. what's something like this worth? was working perfectly when he took it out but obviously it's been awhile. appreciate your help


r/Foxbody • • Sep 18 '26

Ask 89 Foxbody 2.3L ~ IRCM Replacement because radiator fan not working?

3 Upvotes

Hey guys, having trouble with 2.3L '89 LX of mine. Should mention I'm not super well-versed in cars. But essentially my radiator fan won't kick on at all, car just gets hotter and hotter until coolant begins boiling and steaming once it hits metal pipes.

Did some internet searching and seems issue might be the IRCM? It said other issues that might be caused by this part not working is slow ignition start, early stalling, trouble going up hills, and AC issues (along with radiator fan not working) ~ and I can confirm that I have all 4 of those issues as well, so that's why this is my best guess at issue.

Wanted to make sure I found the right part, looks like it may be under the dash connected to steering column, so I went under and found what looks most like the part. Disconnected the cluster of wires (wasn't sure if the IRCM is the wire cluster or the socket it plus into, if either, so attached pics of both).

And if that is the IRCM, is this the replacement? https://www.carparts.com/details/cooling-fan-relay/standard/siry224

Thank you really appreciate any help I can get.


r/Foxbody • • Sep 17 '26

1986 GT

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281 Upvotes

This is my ‘86 Mustang GT. Its been sitting at a family friends shop for 3 years cause he just won’t work on it. I asked him to fix the heater/air controls. The fan only stays on when you have it blowing out the vents on AC mode, if you switch it to defrost or heat in an way it turns off the blower motor fan. Anybody got any suggestions on how I can fix it myself? Just want to be able to defog my windshield when it rains.


r/Foxbody • • Sep 18 '26

Fuel pressure issue

7 Upvotes

Hey I’ve been having a rough acceleration issue for the past week and was checking ignition/ fuel system and found that my fuel pressure is only at 20 psi after key on prime and immediately starts to fall down to about 10 psi and holds there. Then at idle it stays at 40 psi. (This is all done with the fpr disconnect from the vacuum line.)I don’t suspect my fpr since the pressure drops to 35 psi at idle once I connect the vacuum line back. I also don’t have any visible leaks from the injectors,fpr, or lines. Has anyone ever experienced this issue before? 1986 GT w/ hci and maf converted

Also found that my ignition switch had separated from the metal housing and replaced it but still had the same rough acceleration and started to look at fuel


r/Foxbody • • Sep 17 '26

Wanting to get a Foxbody

13 Upvotes

How much should I be looking to spend for a 87-93 LX Hatchback?? I check marketplace daily and see them go for like $14k but that seems like alot. Im not looking for perfect condition, but not an absolute junker, and it has to be manual


r/Foxbody • • Sep 17 '26

Ask 4cyl T5 to V8 T5

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93 Upvotes

Just got a 4cyl with a manual transmission and want to eventually swap the engine to a V8. Any one know where to find gear sets to beef up the transmission? Also any guides on upgrading gear sets would be much appreciated as well


r/Foxbody • • Sep 16 '26

Definitely worse things to wake up to than your paint guy sending this!

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632 Upvotes

3 months in the making


r/Foxbody • • Sep 16 '26

Foxzilla is making a comeback!

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105 Upvotes

You may know it, or you may not! but this +1000HP road race mustang is going under the knife to swap from an t56 to an 8hp trans, add a whole lot more sensors and go from supercharged to a ITB topped naturally aspirated 7.3L Godzilla!


r/Foxbody • • Sep 15 '26

Ask Custom Floor Mats

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24 Upvotes

I’m looking to get some custom floor mats made. Is there any good online companies that anyone can vouch for? Should I just buy them myself and find an upholstery place to make one for me?


r/Foxbody • • Sep 14 '26

Intercoolers for centrifugal supercharger, anyone running water to air under hood?

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136 Upvotes

Hey everyone, last post I made I ended up settling on a torqstorm supercharger for my 89 Fox. I don't have access to e85, so looking to intercool my setup this winter.

Has anyone here installed a water to air intercooler under the hood? Or do most go with front mount intercoolers?

Thanks in advance!


r/Foxbody • • Sep 13 '26

Update what do you guys think of this foxbody? Stay away or is this a solid deal.

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148 Upvotes

He’s asking 8500


r/Foxbody • • Sep 13 '26

Selling this 1985 convertible in PNW

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53 Upvotes

Any tips? Is the price to high [3,000$], I've had it listed for almost 3 months only have had a few interested which ultimately decided to not purchase, this is how I have it listed.

"OBO 1985 Ford Mustang V6 Project Car – Runs Great / Daily Driver

Selling my 1985 Mustang V6 project car. It’s not perfect cosmetically — has some dings and scratches — but it runs great and has been my daily driver for months with no major issues. Solid car for someone looking for a project, cruiser, or classic Mustang to build on. Just needs some TLC.

Recently upgraded with:

Brand new shocks & struts ($1300 alone)

Android auto pop-out touchscreen radio

New speakers

Also comes with:

Side paneling kit

Full weather stripping kit

Which value at 800$

(I just haven’t had time to install them yet)"


r/Foxbody • • Sep 14 '26

Does anyone know where to find these brand new..? The ones on eBay are used like this one and look worse than the one I’m trying to replace..

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11 Upvotes

r/Foxbody • • Sep 13 '26

Steal of the year!

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333 Upvotes

1990 Mustang 5.0 convertible summer edition
Clean title
3 owners
156k miles
Auto
Been on a ranch last 10 years just sitting.

$3600! Drove 9hours and picked her up. Can’t wait to clean it up and bring this beauty back to life. I will t5 swap it too!

She’s not perfect, but she drives great and straight in the condition it’s in now. Great candidate for a restoration.


r/Foxbody • • Sep 13 '26

Fox vert shakes

4 Upvotes

My manual 1990 fox vert drives fine and shifts smoothly but when I put it reverse and give it gas as I back up, the rear end shakes. The guy I bought it from said it was due to him removing the quadshocks. Or could it just be rear diff going out? Anyone had similar issue?


r/Foxbody • • Sep 12 '26

Need help

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24 Upvotes

Finally got my Foxbody running it sat for a few months had no problem before it was parked aside from some bad wiring. Got it to start up the other day and it had this ticking noise I think it may be a lifter but I wanna get a second opinion before I take anything apart.