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Thread: 4.6 Mod motor with no acceleration.

  1. #1
    Potential Tuner
    Join Date
    Feb 2018
    Posts
    3

    Lightbulb 4.6 Mod motor with no acceleration.

    Hello guys I am relatively newer to tuning. I used to work at a shop where my boss did it and he taught me a little but this is the first I am solo. So I was hoping you guys might be able to help I have a 2009 4.6 Mod Motor from Mercury Grand Marquis that we have swapped into an older Lincoln.

    4.6 Modular over head Cam motor we upgraded the injectors to keep up with the Cams the injectors are 32lb injectors. The Cams are the only other modifications. Part number 102-201-9L and R (Both sides)
    Gross Valve Lift Intake:.495 Exhaust:.495
    Cam Lobe Lift Intake:.2740 Exhasut:.2740
    Adv. Dur. @ .006 Valve Lift Intake:267 Exhaust:273
    Valve Timing at .050
    Open Intake: 5 BTDC Exhaust: 56 BBDC
    Close Intake: 45 ABDC Exhaust: 0 ATDC
    Specs are for 110.0 Intake center line Exhaust Center Line @ 118.0
    Intake 230
    Exhaust 236
    Duration @.050

    We deleted all but one 02 Sensor as well as the EGR.

    We have gotten it to start and idle fine but when you press the gas the timing gets pulled and it back fires and sputters and I am at a loss at this point and can not figure that out. Please if you guys have any clues or ideas or tips it would be greatly appreciated. Also if I pull the fuel rail pressure sensor i can get a small acceleration to move but that is all.

    I am going to attach the current tune and some recorded logs.

    Thank you for any help yall can give.
    Attached Files Attached Files

  2. #2
    Tuner in Training
    Join Date
    Jan 2012
    Location
    Carolina, PR
    Posts
    43
    Is this installed on an older vehicle? what you are using for fuel pump?

  3. #3
    Potential Tuner
    Join Date
    Feb 2018
    Posts
    3
    It is swapped into a 68 Lincoln. The fuel pump is electric pump to a fuel regulator. I believe it?s set to about 60 PSI but can confirm tomorrow