1994 Mustang GT money pit I mean project

Discussion in 'All Non-S197 Media' started by joe_momma, Nov 18, 2020.

  1. joe_momma

    joe_momma forum member

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    I found a free one on the App Store, 5 stars with something like 12k reviews. I'll give it a test at lunch.

    Also, no cup holder in this thing which is a real PITA after having vehicles with them everywhere. At present, I just wedge my coffee cup between the seat and the e-brake. Works fine unless I hit the brakes hard.
     
    jewc75 likes this.
  2. tjm73

    tjm73 of Omicron Persei 8 S197 Team Member

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    In '98 the cars got cup holders. Look for a '98-04 console in the same interior color and swap it.
     
  3. joe_momma

    joe_momma forum member

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    Ahh, excellent info, thank you.

    Updated speedo numbers:
    GPS/Speedometer
    50 - 55
    65 - 72
    75 - 82/83
     
  4. tjm73

    tjm73 of Omicron Persei 8 S197 Team Member

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    10% high
     
  5. Juice

    Juice forum member

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    That's one speedo gear tooth away from "as close as you will get".
     
  6. Dino Dino Bambino

    Dino Dino Bambino I have a red car

    Age:
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    A stock pushrod SN95 5.0 GT typically put down 190-195rwhp at ~4400rpm so it was normal for it to run out of steam by 5000rpm. It responds well to N/A bolt ons but you need heads/cam/intake manifold to make 300+rwhp.
    What size tires do you have? It'll help me calculate what rear axle ratio you have.
     
  7. tjm73

    tjm73 of Omicron Persei 8 S197 Team Member

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    If you remove the speedo cable from the transmission you will most likely find a white gear on the end of the cable. White is 23T. if it's not white, it may be red. Red is 21T if I recall correctly. The next step down. Whatever it is, the 23T is as close as you can get without resorting to speedo reduction boxes which bring more accuracy but also more expense. A 23T gear is like $20 bucks or so. Speedo correction boxes are $125+ online.

    If you pull it out you will most likely find it looking all chewed up.

    Is the car still rolling on 245/45R17's? I ran 255/45R17's on my '98 and it was almost dead nut's on the money. I thought the tires looked better too. But that a preference thing.

    https://lmr.com/products/Mustang-Speedometer-Gear-Calculator
     
  8. joe_momma

    joe_momma forum member

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    It's the stock 17s - 245/45/17.

    It may just need a new speedo gear, as mentioned. Aren't they notorious for getting chewed up?

    Also, the high-RPM miss is back, but it's above 5k. I'm thinking it's a fuel issue. I have the new fuel filter coming today, I'll put it in tomorrow along with plugs/wires.

    A couple other items: airbag light is on. Upon startup, it flashes slow for a few seconds, then goes solid.

    Does anyone know if FORSCAN will read codes on these? I have FORSCAN for messing with my truck, it would be handy if it worked on these.

    I've reached out to my tint guy, to see about getting the tint replaced next week. It's old and is peeling/bubbling. I can't stand bad tint.
     
  9. tjm73

    tjm73 of Omicron Persei 8 S197 Team Member

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    Yes. Ford actually does not have a 23T gear. It's a Chrysler gear from what I remember. Based on my own past experience I would buy one and expect to change it. If it's not bad now, you will need it some day. They're like $12-15 bucks.
     
  10. Juice

    Juice forum member

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    No, Forscan will not read codes of the Airbag system, I don't even think the Ford Star tool (I think it was called) would help as it only displayed the same number as counting the flashes.
    Count the flashes and google it. Most common issue with those was the clock spring. I have a clock spring from my 91 I replaced and it wasn't the problem. If its the same part number, you can have it for shipping cost.

    What TJM said on the speedo gear. I had a 23 in mine at one point and it was chewed up, but still worked fine. I suggest you pull the speedo cable and pull the inner piece out and coat it with some grease. May help with the bouncing needle.
     
  11. joe_momma

    joe_momma forum member

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    Seems like the '94 GT is still OBD-I, which won't play nice with FORSCAN.

    I'll count the flashes this weekend when I'm doing the tune-up. I drove the truck today, it was lonely.
     
  12. tjm73

    tjm73 of Omicron Persei 8 S197 Team Member

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    Do you care about the airbag? More specifically do you care if it would go off or not in an an accident? You could unhook it in the steering wheel and then remove the bulb from the socket to "silence" the light.
     
  13. joe_momma

    joe_momma forum member

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    I hope I never have to find out lol. It's pretty low on the priority list at the moment, in all honesty. I can overlook it for the time being - it's just one of those things that will eventually bug me to no end and I'll have to do something about it.

    Priorities at present:
    - track down the high-RPM miss
    - interior smell
    - get the radio sorted out
    - tint
    - exhaust

    I have parts coming today/tomorrow for the tune-up as well as an interior "bomb". I've also got some items coming to help with the stereo. I know the sub amp is disconnected at the battery, and I'm hoping it also powers the front door speakers, as they are non-functioning. I can't see behind the grills well enough to determine if there are speakers there or not.

    I'm thinking I want to go with Borla ProXS mufflers - from the clips I've heard they sound pretty good. Although I love the sound of Flowmasters - they are icons in the 5.0 world, I just can't handle that drone.
     
    Last edited: Nov 20, 2020
  14. Dino Dino Bambino

    Dino Dino Bambino I have a red car

    Age:
    57
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    Just as I thought. I had the same tire size on my old '95 GT.
    According to my calculations you most likely have 3.90 axle gears.
     
  15. tjm73

    tjm73 of Omicron Persei 8 S197 Team Member

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    Iif your interior bomb doesn't fix the smell, pull both front seats. Mix up some carpet cleaning soap. Grab a good stiff bristle brush and scrub all the carpet. Get it sopping soaking wet. Use a wet dry vac to suck out as much moisture as you can. Open both windows and put the biggest fans you have so they are blowing into the interior to finish drying it out. This will take a full two-three days.
     
  16. golkhl

    golkhl forum member

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    You can get the speed sensor and speedometer/odometer gears on Amazon.
    27A05975-3CB6-4FA3-8610-2F9BA2577DBC.jpeg C91AA517-F6ED-4D78-B2D5-E34378803DBB.jpeg
     
  17. tjm73

    tjm73 of Omicron Persei 8 S197 Team Member

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    1994 Mustangs with the T5 don't use a speed sensor. Ford used gears on the manual cars through '98.

    The electronics only tell the ECU the vehicle speed. The speedometer was still mechanical at that point.
     
  18. golkhl

    golkhl forum member

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    Another thing you can try for the stank interior, buy a couple boxes of arm and hammer fridge and freezer baking soda. It will help.
    F60406E1-9774-4777-8ADD-AAB6AE5927BA.jpeg
     
    tjm73 likes this.
  19. RED09GT

    RED09GT Equal Opportunity Offender S197 Team Member

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    How is the condition of the distributor cap and rotor? If the fuel filter and plugs and wires don't help, that would be the next thing to replace.
    Check your base timing as well.
     
  20. golkhl

    golkhl forum member

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    My 94 Cobra has a speed sensor, from the factory, as it plugs into the factory wiring harness? I thought the speed sensor sent a signal to the pcm, and the gears were only for the speedo/odometer?
     
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