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Thread: 6.4 with mds delete questions/ advice

  1. #1
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    6.4 with mds delete questions/ advice

    i have a 2014 ram 6.4. have no idea what tune, or cam. upon cold start get misfires on all 8 cylinders but not every time. driving down the road when warm truck drives great. get a check engine light on with a p0300 and also p000b. have pulled front cover and timing is correct. pulled both valve covers and do not find anything wrong. any help would be helpful. thank you

  2. #2
    Advanced Tuner
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    If it has an aftermarket cam, disable P000B and raise misfire detection rpm

  3. #3
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    i will give that a shot and drive it for the weekend thank you

  4. #4
    Advanced Tuner rays04gtx's Avatar
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    Quote Originally Posted by bjdj22 View Post
    i have a 2014 ram 6.4. have no idea what tune, or cam. upon cold start get misfires on all 8 cylinders but not every time. driving down the road when warm truck drives great. get a check engine light on with a p0300 and also p000b. have pulled front cover and timing is correct. pulled both valve covers and do not find anything wrong. any help would be helpful. thank you
    Is it a 1500 with a 6.4 ? or a 2500/3500 , doesn't make that much of a difference.

    Log desired FA and check it against the table values, depending on your elevation it could just be not enough cold start enrichment, or it's still stock...
    I've had to fix a few "pro Tunes" for people who live above 2800ft with cams over 220 duration at .050 99% of the time , the Cold enrich table is too low, once you get some warmth in to it it's fine but not in the morning when it all gets cold again.

    Engine>Fuel>Open Loop/Base>Cold/Warm Up>Gas (Table 34210)
    62 Biscayne 425/409 SS/D stock class car 10.60s
    66 Dart 426CIG3 8.60@171 2750lbs Naturally asperated
    04 Ram All Alum , 468Ci G3 10.50s @4800 lbs Naturally asperated
    04 Rumble Bee, built 6.1 ,4000lbs 10.48 @ 129s MPH. Naturally asperated
    05 Rumble Stock 5.7, 3.92s TUNE ONLY 13.94@98mph