Lightening Maf Wiring

Discussion in 'Fox 5.0 Mustang Tech' started by 90GTFIVO, May 31, 2013.


  1. 90GTFIVO

    90GTFIVO Member

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    I'm thinking of swapping my Pro-M 75mm MAF (calibrated for 24# inj) for a 90mm LMAF. I'm installing 60# Siemens Deka injectors and will need to have the sensor calibrated. So I have 2 questions:

    1. What wiring modifications will I be getting into?

    2. Is it as easy to have Ford calibrate the MAF as it is with Pro-M (simply mailing it in to them)?

    Also, what other mods am I missing? Will this require an adapter plate?
     
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  2. MikeH686

    MikeH686 Mine is only two inches though.

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    An adapter plate will be needed and as far as I am going to do is get the adapter plug to adapt the mustang maf plug to the lightning maf
     
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  3. srtthis

    srtthis the guy doing it does every local racers rear end

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    find a local tuner you trust hand have him redo the PCM to work with the MAF and injectors...
     
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  4. 90GTFIVO

    90GTFIVO Member

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    Yes, good point. The plan is once my upgrades are complete (including the 255 Lph HP fuel pump), I'll take it to a tuner I've found locally.
     
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  5. MikeH686

    MikeH686 Mine is only two inches though.

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    I hate to thread jack but my question is can I start the car with thelightning Maf and once its running I can trailer it to my tuner just wondering
     
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  6. jrichker

    jrichker StangNet's favorite TOOL SN Certified Technician Founding Member

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    Not likely...
    If the air/fuel ratio isn't within range you're going to have problems getting it to start and keep running.
     
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  7. Noobz347

    Noobz347 Stangnet Facilities Maint Tech... Er... Janitor Admin Dude

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    What size injectors do you have installed Mike?
     
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  8. MikeH686

    MikeH686 Mine is only two inches though.

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    42s the maf and injectors are off the same truck
     
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  9. Noobz347

    Noobz347 Stangnet Facilities Maint Tech... Er... Janitor Admin Dude

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    Don't think it's going to work Mike. If you had a MAF calibrated for an A9L and 42s it would likely start but run like crap and pig rich. With the LMAF --and--42s... you're pretty much out of options. The A9x doesn't like the LMAF without a transfer curve and it doesn't like 42s without injector slopes.

    Plan on trailering to the tuner.
     
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  10. MikeH686

    MikeH686 Mine is only two inches though.

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    Hmm OK then hah I just wanted to get it to start before I get it up there ya know? That way I'm not wasting his time or whatnot
     
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  11. Noobz347

    Noobz347 Stangnet Facilities Maint Tech... Er... Janitor Admin Dude

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    Well, you could always swap in a set of 19s just to start it and hear it idle. Don't even need a MAF. It'll idle in limp mode.
     
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  12. MikeH686

    MikeH686 Mine is only two inches though.

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    Alright I think I'm gonna cut it and get a pro m maf and re sell the lmaf
     
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  13. MikeH686

    MikeH686 Mine is only two inches though.

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    Really? Hmm didn't know that will an SCT tune be able to get it to work with a lmaf
     
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