Page 2 of 6 FirstFirst 123456 LastLast
Results 11 to 20 of 59

Thread: Mass Air added, hesitation off the line

  1. #11
    Join Date
    Jun 2005
    Location
    Chicago
    Posts
    10,433
    Feedback Score
    17 (100%)

    Default

    '88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, Edelbrock 70mm TB, 76mm C&L MAF, 30lb injectors, 2.5" exhaust, AOD with 2800 PI converter, 8.8 with 3.73 gears, 31 spline Traction-Lok, 31 spline Moser axles, 04 Cobra front arms, Maximum Motorsports extreme duty rear arms, subframes.
    '11 Focus, '12 Mustang 3.7, '17 Accord EX-L V6

  2. #12
    Join Date
    Jan 2005
    Location
    Ardmore,Oklahoma
    Posts
    19,439
    Feedback Score
    135 (100%)

    Default

    I use a '93 Cobra X3Z computer in my Sport. It's calibrated to 24# injectors.
    '88 Sport--T-5,HURST shifter,TMoss GT-40 intake,Ed Curtis cam,Trick Flow heads,Scorpion rockers,70mm t-body,3G,mini starter,Taurus fan,BBK headers,O/R H-Pipe, Flowamaster 40's, deep and deeper Cobra R wheels,Mass Air, Mass Air and 24's,8.8 with 3.73's,140 mph speedo,Mach 1 chin spoiler,SN-95 springs,CHE control arms,aluminum drive shaft and a lot more..

  3. #13
    Join Date
    Oct 2004
    Location
    Gap Mills WV 24941
    Posts
    14,078
    Feedback Score
    15 (100%)

    Default

    Quote Originally Posted by thunderjet302 View Post
    . If you don't know what MAF you have in your 331 parts pile don't use it.
    .

    Its a pro-m maf.
    it has no sn, pn

    i am calling the oem today to find out the application.

  4. #14
    Join Date
    Oct 2004
    Location
    Gap Mills WV 24941
    Posts
    14,078
    Feedback Score
    15 (100%)

    Default

    actually it does have pn, sn & calibration code, was hand written but almost gone ,,

    got it & intake & computer from here.

  5. #15
    Join Date
    Oct 2004
    Location
    Gap Mills WV 24941
    Posts
    14,078
    Feedback Score
    15 (100%)

    Default

    also,, the car is *not* running like crap either with the MK8 & 24lb injectors on the A9P eec

    I think i mentioned the only issue is slight 1/2 second hesitation from idle to quick throttle.... like a communications delay or something.

    Anyway,,

    pic of our maf coming up here in a few.

  6. #16
    Join Date
    Oct 2004
    Location
    Gap Mills WV 24941
    Posts
    14,078
    Feedback Score
    15 (100%)

  7. #17
    Join Date
    Jun 2005
    Location
    Chicago
    Posts
    10,433
    Feedback Score
    17 (100%)

    Default

    Quote Originally Posted by jcassity View Post
    also,, the car is *not* running like crap either with the MK8 & 24lb injectors on the A9P eec

    I think i mentioned the only issue is slight 1/2 second hesitation from idle to quick throttle.... like a communications delay or something.

    Anyway,,

    pic of our maf coming up here in a few.
    99.999999% chance that is caused by the Mark VIII MAF. I guarantee it. Running the Mark VIII MAF without a tune will screw up a bunch of things with fuel control/load calculations. No matter what you do that Mark VIII MAF will not work without a tune.

    Quote Originally Posted by jcassity View Post
    here is where i got the Maf,, was from Flipnbird

    http://www.foxtbirdcougarforums.com/...mass-air-meter
    I looked at that MAF. You need to find out if it's set up for the stock airbox or a conical filter clamped to the end of the MAF. They have slightly different flow curves depending on what is in front of the MAF. Most of the time a MAF like what you purchased is set up for the stock airbox. Most of the time.
    '88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, Edelbrock 70mm TB, 76mm C&L MAF, 30lb injectors, 2.5" exhaust, AOD with 2800 PI converter, 8.8 with 3.73 gears, 31 spline Traction-Lok, 31 spline Moser axles, 04 Cobra front arms, Maximum Motorsports extreme duty rear arms, subframes.
    '11 Focus, '12 Mustang 3.7, '17 Accord EX-L V6

  8. #18
    Join Date
    Jun 2005
    Location
    Chicago
    Posts
    10,433
    Feedback Score
    17 (100%)

    Default

    Also read this, all 3 sections: https://web.archive.org/web/20150225...php?section=10

    It'll help explain why all this stuff I'm talking about is important.
    '88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, Edelbrock 70mm TB, 76mm C&L MAF, 30lb injectors, 2.5" exhaust, AOD with 2800 PI converter, 8.8 with 3.73 gears, 31 spline Traction-Lok, 31 spline Moser axles, 04 Cobra front arms, Maximum Motorsports extreme duty rear arms, subframes.
    '11 Focus, '12 Mustang 3.7, '17 Accord EX-L V6

  9. #19
    Join Date
    Oct 2004
    Location
    Gap Mills WV 24941
    Posts
    14,078
    Feedback Score
    15 (100%)

    Default

    Quote Originally Posted by thunderjet302 View Post
    Also read this, all 3 sections: https://web.archive.org/web/20150225...php?section=10

    It'll help explain why all this stuff I'm talking about is important.
    im going with your word on it,,, i trust your info.

    I will ask Flipnbird about the air box but we do have either the stock air box or conical for more volume if required.

    Q- how do we know if i have a fucked up set up if its not running bad or throwing codes?

    The mk8 maf & 24lb inj were not tossing codes and we were not rich

    we are now installing this other PMaf from Flipnbird with his injectors (even though his and the mk8's both read 13.7ohms),


    if it runs better how will we know especially when things seemed good before? except for that common hesistation even mentioned on the cobra EEC ford muscle complained about as well

  10. #20
    Join Date
    Jun 2005
    Location
    Chicago
    Posts
    10,433
    Feedback Score
    17 (100%)

    Default

    I had a bad MAF that was leaning out and causing a bad hesitation off the line. Didn't throw any codes but when I back probed the O2 sensors at the EEC harness you could see they were showing lean to the EEC. I swapped in another MAF and the issue went away. No codes were thrown in that case as everything was "in spec" but lean.

    You shouldn't have to swap the injectors, just the MAF should be good.

    Edit:

    Ohming the MAF does nothing for you at this point. You'd want to back probe the MAF connector and see what reading (voltage) it's putting out at idle, 1000rpm, 2000rpm, 3000rpm, etc.

    Also stop trying to use the Mark VIII MAF without a tune. The Mark VIII MAF will not work with an A9P without a computer tune, no matter what you do.

    If it's running good the hesitation will go away. I'm running a calibrated MAF for 30lb injectors on an A9P and 30lb red top FRPP injectors, no tune. There is NO hesitation anywhere at any throttle angle.
    Last edited by thunderjet302; 08-15-2017 at 12:57 PM.
    '88 Thunderbird LX: 306, Edelbrock Performer heads, Comp 266HR cam, Edelbrock Performer RPM intake, Edelbrock 70mm TB, 76mm C&L MAF, 30lb injectors, 2.5" exhaust, AOD with 2800 PI converter, 8.8 with 3.73 gears, 31 spline Traction-Lok, 31 spline Moser axles, 04 Cobra front arms, Maximum Motorsports extreme duty rear arms, subframes.
    '11 Focus, '12 Mustang 3.7, '17 Accord EX-L V6

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •