High Rpm Studder/break Up

Discussion in 'Chrysler, Dodge and Jeep' started by 06BlownMagnum, Aug 20, 2015.

  1. 06BlownMagnum

    I'm trying to track down why my car kind of studders or breaks up under boost at high rpms. Fuel is good. Its around 10lbs, after about 5900-6000 rpm I can start to feel it. Its hard to know for certain if it's fuel because when it breaks up my wideband shows rich. Spark plug gap? Maybe I need to get better coils?
     
    06BlownMagnum, Aug 20, 2015
    #1
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  2. vinces427bb Staff Member

    what spark gap? too large above 0.032" the spark can be blown out by boost
    could be a coil or spark plug/wire that's going defective:blackalien:
    what do the plugs show??
    then its possible for weakened valve spring pressure to allow valve float in that rpm range above 5700rpm o_O
     
    vinces427bb, Aug 21, 2015
    #2

  3. 06BlownMagnum

    Gapped only around 0.035. Air/fuel seems good, except when the break up happens. It's like it hiccups rich. Spark blowout?
     
    06BlownMagnum, Aug 26, 2015
    #3

  4. vinces427bb Staff Member

    I feel it will be hard to tell without being on a Dyno session
    they can monitor the spark at the plugs and should be able to tell you
    if it is weak spark or weak valve springs on 1-or-more [intake side] cylinders
    unless you are going to upgrade the coil packs and plug wires anyways =the dyno would be recommended for this issue...
     
    vinces427bb, Aug 26, 2015
    #4

  5. vinces427bb Staff Member

    any progress or update on the issue???o_O
     
    vinces427bb, Sep 22, 2015
    #5

  6. bigblockragtop

    I am far from a pro but I think the gap is too big. Most I have read about use 25 max.
     
    bigblockragtop, Sep 23, 2015
    #6

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