Common 4.6L V8 4V Problems

Discussion in '96-04 - 4V Specific' started by Orange 94, Jul 4, 2013.

  1. Orange 94

    Orange 94 Moderator Staff SN95 Supporter

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    Oct 21, 2012
    Alberta Canada
    This thread will cover some of the common problems with 4.6L V8 4V in the SN95. The information in this thread was provided by members of our community, thank you all that helped.

    If you have any questions after reading this thread please try using the search bar located in the top right. Chances are there is already a topic covering your exact question.
    After trying the search bar please feel free to start a thread in the appropriate section for addition information. Our community is happy to help!

    Lastly, if you have any corrections or addition information please post it in this thread! I'll add the information to this first post!


    1. 96/97 4v cobras do not use the same ECM/harness as 98 cobra

    2. C heads valve train tick. Have yet to hear of the tick specifically causing failures. There are a few hypothesis as to what causes it, but most point to the cooling on the #8 cylinder.
    Solution: Doing the head-cooling mod helps remedy the "tick" (supposedly) as well as assists flow at WOT to allow the some of the coolant to return to the rest of the cooling system faster.

    3. B heads IMCRs get dirty, clog and no longer open.
    Solution: Budget friendly, remove butterfly flaps, weld holes closed and putting the empty plates back.
    MustangChris, wht1997cobra

    4. Cobra and Lincoln use different cams and intakes.

    5. Fuel and Computer parts vary on 97, 98, 99.

    6. Cooling Issues.
    Solution: Burping the cooling system completely. Make a replacement plug for the crossover. Correctly solder your fresh fan harness on, don't quick tie it on.

    7. Ticking lash adjuster.
    Solution: Buy a tool such as