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Thread: cammed Camaro m6 is hard to start and poor throttle response

  1. #1
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    cammed Camaro m6 is hard to start and poor throttle response

    First of all i am in no ways a tuning expert and I admit tuning a cam as big as the one in my car maybe too much for a beginner. With that out of the way this is a M6 5th gen camaro with a cold air intake long tube headers and a stage 4 f35 cam from texas speed. I flashed the tune enclosed and the car started great ran normally save for the usual surge at low RPMs, I go to start the car again after a drive and it refuses to start, I hooked it up to a battery tender and held it in ignition for about 10 seconds and finally it started but idling poorly, once i put it into gear the throttle response was almost non existent with my foot being in all the way and the revs not budging. Also if the throttle did move the car it would hesitate horrendously and make loud constant popping noises.I included the 2 logs and is anyone willing to chime in or point me in the right direction?
    Attached Files Attached Files

  2. #2
    Tuner Camaro6's Avatar
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    F35 cam works well on the 5th gen platform. I've done a bunch of them & have the cam in my nephews 5th gen which my sister in law drives as well. I see you have it idling at 1,025 but that cam will idle at 800-850 without issue. I can remote tune the car if you want to DM me. Look at our videos on IG (orange wrap 5th gen that is now blue wrapped) I changed the fuel item that will make it run rich if you load a tune once warmed up.

    2012 camarof35 cam tune on car NLTP Chg.hpt
    Last edited by Camaro6; 2 Weeks Ago at 09:22 PM.
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  3. #3
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  4. #4
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    I can't look at the log, but no pedal and poor idle is usually rep

  5. #5
    Senior Tuner edcmat-l1's Avatar
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    Looks dead lean most of the time. Long term trims are constantly +25%. O2 waveforms look strange. Idle timing control is totally screwed need to put the over/under tables back to stock. you have it pulling 15 degrees of timing if the idle speed is off 16 RPM.

    idle overspeed.jpg

    Need to check the fuel pressure and then it needs to be properly dialed in.

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  6. #6
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    Thats going to be a hard job for a new person.

    You'll want to read up on speed density tuning VVE with this cam. Might not be a bad idea to get a start up tune from a seasoned tuner.
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