what size is the maf from a town car

Discussion in 'Fox 5.0 Mustang Tech' started by Simple88GT, Jun 5, 2009.


  1. Simple88GT

    Simple88GT New Member

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    like it says.

    I bought one off of a 94 town car to do my mass conversion and when I measure it it is 76mm on the out and 84 on the in. Does that sound right?

    thanks

    -Josh-
  2. jrichker

    jrichker StangNet's favorite TOOL SN Certified Technician Founding Member

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    The only other MAF that is a one for one swap for a 93 and earlier 5.0 Mustang is the 94-95 Mustang MAF.

    The MAF body and sensor are designed to match each other. Therefore you can't swap sensors between different part number MAF bodies and maintain proper calibration. The assembly is designed to match the computer’s internal program, and swapping a different MAF can upset the computer's calibration. In other words, your monster MAF probably won't match the calibration of your 5.0 Mustang computer.

    94-95 Mustang GT MAF - $40-$100. It is 70 MM instead of the stock 55 MM on regular stangs built prior to 94. It uses a slip on duct on the side that goes to the throttle body and a 4 bolt flange on the other. You need a flange adapter to fit the stock slip on air ducting that goes to the air box. Wiring plugs right in with no changes. *1 *2

    *1.) Metal flange adapter Kurtz Kustomz Motorsports, Inc. KKM Buy the TR70 for $44.95. Or spend some time on eBay looking for one that may fit.
    Try AutoZone and ask for 81413 - Spectre / 3 in. Aluminum Intake Mass Air Flow Sensor Adapter at $12.00. You may have to order it online.

    *2.) MAF & sensor interchange
    The 94-95 Mustang 5.0 MAF & sensor is also found on:
    1995-94 Mustang 3.8L F2VF-12B579-A2A,
    1994-92 Crown Victoria 4.6L F2VF-12B579-A2A,
    1995-94 Mustang, Mustang Cobra 5.0L F2VF-12B579-A2A,
    1994-92 Town Car 4.6L F2VF-12B579-A2A,
    1994-92 Grand Marquis 4.6L F2VF-12B579-A2A,
    Evidently the –A1A, -A2A, AA, etc. on the end of the part number is a minor variant that did not change the operating specs. You should be able to ignore it and have everything work good.


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  3. vristang

    vristang Advanced Member

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    ^+1

    Post all the part numbers on the sensor...
  4. Simple88GT

    Simple88GT New Member

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    I bought the 1994 Town Car maf as stated above, it is in the list of interchangable

    the only variance between the one I bought and the one listed is my numbers are

    F2VF-12B579-A1A

    thats why i was curious as to whether anyone knows what size it is. I was assuming it would be 70mm, but it is not.

    Thanks again

    -Josh-
  5. Simple88GT

    Simple88GT New Member

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    Has any body used the town car maf?

    I am doing my swap today and any info would be great. I will let all know how it works.

    Thanks

    -Josh-
  6. vristang

    vristang Advanced Member

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    dammit,

    Post ALL the numbers on the sensor.............


    Specifically,
    There should be a 'stamping' or 'engraving' that has something similar to...
    AFH70
    AFH55
    etc......
  7. Simple88GT

    Simple88GT New Member

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    sorry, i didnt realize the others were needed

    afh70-04
    and underneath that there is 3f03



    side note though

    car is back together and it is running great i think there is a vac leak somewhere cause i checked vacuum and it is down to 15" also my fuel pressure with vac hose on is just over 20 no vac 39


    -Josh-
  8. vristang

    vristang Advanced Member

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    afh70 = 70mm tube
    There is usually some taper to the housings at inlet/outlet, and that may be what you are measuring...
    As long as that sensor is in it's original housing... you're good to go.

    39psi with the vac off is about right.
    Good luck finding the vac leak.... they can be tricky to hunt down.
  9. Simple88GT

    Simple88GT New Member

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    Thanks for the Info i was thinking it was tapering down to 70mm but it was hard to tell. as far as i know it is the original housing. I am probably just going to change all of the hoses and plugs. would it be a problem to get rid of the vac tree? I have more than enough places on the manifold to put the remainder hoses on.

    Thanks for all of the help I truly appreciate it

    -Josh-

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