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Thread: 91 mustang w stroked 347 lean misfire?

  1. #1
    Junior SCH Member
    Join Date
    Mar 2011
    Posts
    1

    91 mustang w stroked 347 lean misfire?

    Trying to Help my cousin get His supercharged 91 mustang
    running right V-8 (348)
    he had one of his friends put all the components on it
    but it's easy to see that His used to be friend is a jerry rigger
    I've got 30 plus years wrenching
    but have only worked on a few supercharged motors

    Anyway
    the car runs very crappy to me it sounds like it's got a pretty bad lean misfire so I'm trying to determine the specific problem or problems
    thinking that a performance component or two are incompatible, some settings are incorrect, etc...

    Here's what I've gathered so far of the list of components on the car


    The motor is a Ford Racing SVO block, crank, pistons, and connecting rods are all forged. The engine is completely new from intake to oil pan.

    Still acts like it needs to be broke in and or the rings seated
    As there is enough blow by to cause some oil to come out of the breather cap on one of the valve covers

    Wondering how much of a problem this will be while trying to dial everything in?


    List of components continued>

    Supercharger: Vortech V-1T-trim D-213-17

    Power Pipe: Anderson Power Pipe® For Vortech Supercharges Part#AF-0101A

    Throttle Body: Professional Products Satin 75mm with EGR Spacer Part #PP-69205 & PP-69505
    Mass Air Meter: Pro-M 95mm Mass Air Flow Meter For 42lb Injectors Part #PMA-95V42

    Plenum: Trick flow

    Injectors: Delphi Hi-Flow 42lb High Impendence Injector, Jetronic/Minitimer Electrical Connection Part #DEL-42DH (Black in color)

    Are these injectors big enough for this application?

    (Pix of the different injectors)
    http://www.allfordmustangs.com/forums/1783896-post.html

    Fuel rail: aeromotive

    Fuel pressure regulator: Aeromotive

    What should the fuel pressure be set at?

    Fuel pump: aeromotive A1000

    Someone also suggested that there needs to be a 255lph in tank pump with the inline pump or a sump tube?

    MSD multi spark discharge ignition system


    Mallory coil

    Can't read the numbers on the map sensor


    Wondering what specific map sensor is compatible?

    I've got the computer brain(ECU) out:
    Remanufactured electronics Canada
    9019 1006 E9A 14A624 AA
    outer case sealed
    No markings to indicate that it’s specifically
    set up for car’s application or it’s performance components

    What other components will need to be checked/assessed?

    The initial game plan is to research and know what all components are involved,
    determine if they are compatible for the motor and application
    recheck, adjust any base settings that are incorrect

    After that the car will be transported via trailer to a reputable performance shop for
    Dyno tuning, testing, further evaluation, settings, etc…

    We are considering using
    http://www.houstonperformance.com/

    Thanks for your advice, comments, suggestions, etc...

  2. #2
    Junior SCH Member
    Join Date
    Dec 2002
    Location
    Southern Maryland
    Posts
    33
    I don't usually run the breathers on the oil fill because it always shoots the oil out.

    As for the missing, did the guy degree the cam in right, set the timing, and get the firing order right?

    I would also recommend putting the 255lph pump in the tank and the inline pump as well.
    Drive it like you stole it!!!

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