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Thread: Anybody running $0D TBI MAF

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  1. #1
    Fuel Injected! JeepsAndGuns's Avatar
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    Not having one here to look at and measure, whats the ID of it, what size intake tube does it use? Are those rated in CFM they can flow? I just wonder/worry about it being a bottleneck/restriction on a larger engine.
    And not knowing anything about them, are they basicly a one size fits all like the map sensors, or are they sized/matched to engine size?
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  2. #2
    Fuel Injected! babywag's Avatar
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    Quote Originally Posted by JeepsAndGuns View Post
    Not having one here to look at and measure, whats the ID of it, what size intake tube does it use? Are those rated in CFM they can flow? I just wonder/worry about it being a bottleneck/restriction on a larger engine.
    And not knowing anything about them, are they basicly a one size fits all like the map sensors, or are they sized/matched to engine size?
    Inlet is like 3.75" O.D. outlet is like 3.5" O.D. AFAIK the MAF is considered an 85mm??
    SERIOUSLY doubt it's any kind of bottleneck, a tuned stockish 5.3/6.0 can crank out some pretty impressive HP using one.
    The MAF measure the airflow the tables in the .bin dictates the fueling.
    Tony

    '88 Jeep Grand Wagoneer (aka Babywag)
    '67 Jeep J3000
    '07 Dodge Magnum SRT8

  3. #3
    Fuel Injected! babywag's Avatar
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    Wiring verification?

    So here's what I've got...
    MAF
    A - low ref GRD? - PCM B4?
    B - IAT - PCM B9
    C - GRD - PCM B4?
    D - Ignition +12v
    E - MAF - PCM F12

    Can I tie both the grounds (A&C) to pin B4 on the PCM?

    Anybody know if the JTR 2k(pulses per mile) VSS will work on pins F2 & F3, or will I need to snag a DRAC module from the boneyard?
    Or, the Jeep has an 8k(pulses per mile) VSS for the cruise would that work?
    Appears in the MAF .bin there is a setting you can change it's @ 40 per trans shaft revolution?
    Not sure what the math would be...
    Tony

    '88 Jeep Grand Wagoneer (aka Babywag)
    '67 Jeep J3000
    '07 Dodge Magnum SRT8

  4. #4
    Fuel Injected! JeepsAndGuns's Avatar
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    Like I said, I have never seen one or measured one, so I was not sure what the ID of the MAF was. That seems like it would work pretty good with mine, I am running a 3.5in intake tube going to my TB.

    I am running the JTR 2k vss no proplems with my 7427 $0D. I have one wire from it on pin F13, and the other hooked to ground.
    Does switching to MAF change where the vss is inputted to the pcm?
    79 Jeep Cherokee, AMC 401, T-18 manual trans, hydroboost, 16197427 MPFI system---the toy

    93 Jeep YJ Wrangler, 4.0L, 5 speed, 8.8 rear, homebrew hub conversion and big brakes, hydroboost, 2.5in OME lift, 31x10.50's---the daily driver

    99 Jeep WJ Grand Cherokee limited, 4.0L, auto, 2wd, leather and power everything, 99% stock---the long distance highway ride.

  5. #5
    Fuel Injected! babywag's Avatar
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    Quote Originally Posted by JeepsAndGuns View Post
    Like I said, I have never seen one or measured one, so I was not sure what the ID of the MAF was. That seems like it would work pretty good with mine, I am running a 3.5in intake tube going to my TB.

    I am running the JTR 2k vss no proplems with my 7427 $0D. I have one wire from it on pin F13, and the other hooked to ground.
    Does switching to MAF change where the vss is inputted to the pcm?
    My 3.5" K&N won't fit over the MAF inlet, so going to head to a yard today and grab a flex tube from a Ford.
    I know for a fact the 4.6 tbird uses an adapter tube from the MAF to the air cleaner housing that will work.
    Probably other models too, maybe crown vic? so shouldn't be hard to find one.
    Bugs me because had one and I sold it for $20, and now I need it of course.
    Maybe I'll get lucky and find a MAF pigtail, but I doubt it mostly older stuff @ this yard.

    According to what I read online the MAF .bin code is written to have the VSS signal input on pins F2 & F3.
    That is why I asked above about it.

    This MAF is also used on the GTO and the Corvette, so doubt it would hinder performance or create any issues
    In stock trim the GTO is about 400HP, and the Corvette ~350-400hp depending on year.

    Here is an interchange list of vehicles that use the MAF I bought.
    BUICK RAINIER (2004 - 2005)
    CADILLAC CTS (2004 - 2005)
    CADILLAC DEVILLE (2000 - 2005)
    CADILLAC ELDORADO (2000 - 2002)
    CADILLAC ESCALADE (2002 - 2006)
    CADILLAC SEVILLE (2000 - 2004)
    CHEVROLET AVALANCHE 1500 (2002 - 2006)
    CHEVROLET AVALANCHE 2500 (2002 - 2006)
    CHEVROLET C3500 PICKUP (2001 - 2002)
    CHEVROLET
    CORVETTE (2001 - 2007)
    CHEVROLET SILVERADO 1500 (1999 - 2006)
    CHEVROLET SILVERADO 1500 CLASSIC 2007
    CHEVROLET SILVERADO 1500 HD (2001 - 2006)
    CHEVROLET SILVERADO 1500 HD CLASSIC 2007
    CHEVROLET SILVERADO 2500 (1999 - 2004)
    CHEVROLET SILVERADO 2500 HD (2001 - 2006)
    CHEVROLET SILVERADO 2500 HD CLASSIC 2007
    CHEVROLET SILVERADO 3500 (2001 - 2006)
    CHEVROLET SILVERADO 3500 CLASSIC 2007
    CHEVROLET SSR (2003 - 2006)
    CHEVROLET SUBURBAN 1500 (2000 - 2006)
    CHEVROLET SUBURBAN 2500 (2000 - 2006)
    CHEVROLET TAHOE (2000 - 2006)
    CHEVROLET TRAILBLAZER (2003 - 2009)
    GMC C3500 (2001 - 2002)
    GMC ENVOY (2003 - 2005)
    GMC SIERRA 1500 (1999 - 2006)
    GMC SIERRA 1500 CLASSIC 2007
    GMC SIERRA 1500 HD (2001 - 2006)
    GMC SIERRA 1500 HD CLASSIC 2007
    GMC SIERRA 2500 (1999 - 2004)
    GMC SIERRA 2500 HD (2001 - 2007)
    GMC SIERRA 2500 HD CLASSIC 2007
    GMC SIERRA 3500 (2001 - 2006)
    GMC SIERRA 3500 CLASSIC 2007
    GMC SIERRA C3 2001
    GMC SIERRA DENALI (2002 - 2006)
    GMC SIERRA DENALI CLASSIC 2007
    GMC YUKON (2000 - 2006)
    GMC YUKON XL 1500 (2000 - 2006)
    GMC YUKON XL 2500 (2000 - 2006)
    HUMMER H2 (2003 - 2009)
    ISUZU ASCENDER (2003 - 2006)
    OLDSMOBILE AURORA (2001 - 2003)
    PONTIAC BONNEVILLE 2005
    PONTIAC
    GTO (2005 - 2006)
    SAAB 9-7X (2005 - 2009)
    Tony

    '88 Jeep Grand Wagoneer (aka Babywag)
    '67 Jeep J3000
    '07 Dodge Magnum SRT8

  6. #6
    Fuel Injected! babywag's Avatar
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    MAF installed

    Success @ the local yard for a change this morning.
    Found a pigtail too from an '01 Olds Aurora, wasn't from the MAF it was from the EGR?
    Different wire colors but it'll work.

    Found the adapter....source mid 90's t-bird w/ 3.8 (4.6 same one too).
    It's 4" I.D. on one side and 3.5" I.D. on the other.

    adapter.jpg

    So with the above adapter and ~2.5" length of 3.5" tube the MAF is installed and I didn't have to buy a new air filter.
    Or buy a $15 adapter + shipping.
    Checked the local parts stores yesterday, they could order the same one as Summit carries, but would take too long.
    Summit could have gotten it to me in 1 day since I'm close to NV warehouse, but handling + part ~$20 and I'm impatient/uber cheapskate.

    maf.jpg

    Total cost @ the boneyard was $7.76 for the adapter + pigtail + MAP connector(mine had a broken locking tab).

    Got interrupted by kid #1's soccer game, but now I can run and get some shrink tubing and solder up/wire up the MAF pigtail.
    May have it running on the MAF TBI code tonight?
    Last edited by babywag; 05-19-2013 at 02:22 AM.
    Tony

    '88 Jeep Grand Wagoneer (aka Babywag)
    '67 Jeep J3000
    '07 Dodge Magnum SRT8

  7. #7
    RIP EagleMark's Avatar
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    Sweet heatsink for the EST!

    You need some more pluming for cold air... I did a cool setup on a Scout years ago and plumbed it right into firewall to get air from vents under windshield because there was no room to grill area.

    1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
    1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
    -= =-

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