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  1. 11-06-2011, 09:47 PM #1
    dsmnoob91
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    Help mass airflow

    I just finished making my car TT for the second time but it will only stay running with the mass airflow unplugged if u plug it in it runs like crap then stalls but with it un plugged it runs I don't have any vac leaks I checked over everything today... Any ideas
    1991 3kgt sl, all forged internals, 450cc injectors, 13t's, eBay turbo back, walbro 255, hks ssqv bov,turbo smart mbc, 3sx fuel loop, 3sx polly mounts, 3sx dual core rad, FMIC, 99 big bore lifters, xtd stage 3 clutch
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  2. 11-06-2011, 09:52 PM #2
    RealMcCoy
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    What engine harness and ECU are you running?


    Real Performance Automotive (541)816-4500 www.FB.com/RealPerformanceAuto
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  3. 11-06-2011, 10:05 PM #3
    dsmnoob91
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    Jdm ecu and harness with 1 o2 sensor
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  4. 11-06-2011, 10:44 PM #4
    RealMcCoy
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    Check for a missing or damaged fuel pump relay or fuel pump resistor... Pretty common symtom of not having any power to the fuel pump in resisted mode.
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  5. 11-06-2011, 10:44 PM #5
    x2xtreme360
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    Are you logging at all? Do you have a MAF reading? Sounds like a bad MAF to me.

    Vacuum reduction, Powdercoated misc, cruise relocate, Evo9 BOV, Custom catch cans, Russell fuel filter, SS braided fuel lines, High flow fuel loop, Autogage fuel gauge, Catless DP, DNP Y-pipe, Fuel pump hotwire.
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  6. 11-07-2011, 12:54 AM #6
    dsmnoob91
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    Also on my rear precat I haven't put my egr block off plate on yet so that is open don't know of that would do anything or not
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  7. 11-07-2011, 12:53 AM #7
    dsmnoob91
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    No I gotta get a logger and I have a new resistor pack how do I test my mass airflow?
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  8. 11-07-2011, 01:58 PM #8
    RealMcCoy
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    Quote Originally Posted by dsmnoob91 View Post
    No I gotta get a logger and I have a new resistor pack how do I test my mass airflow?
    You have a new fuel pump resistor? or injector resistor pack? Two different things...

    Is it setting a MAFS code before you unplug it? what is the airflow reading on your logger when it starts up?

    Have you checked to see if the fuel pump is loosing power before it dies?
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  9. 11-10-2011, 09:01 AM #9
    dsmnoob91
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    And I blocked egr off and still nothing won't run with mass airflow hooked up
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  10. 11-07-2011, 01:31 AM #10
    MR2
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    Rofl I know someone else with that issue

    car literally runs fine with the MAF unplugged right? as in you can rev it to 5000+rpm and seems ok?
    Building a House, Car Mods on hold!
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