289 Kaput - Next Steps Advice From This Great Forum

Discussion in 'Classic Mustang Specific Tech' started by 68conv5sp, Dec 21, 2013.

  1. woodsnake

    woodsnake Active Member

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    Weak valve springs sound likely here. Do you have solid "before" tune up specs? Do you "know" what the timing and engine idle speed
    are? A spark plug that is not seated properly can also give weak performance, you might double check that, too...
    I think you can improve performance before you plan the rebuild. A couple of things that I preach often over the internet is to replace the stock timing gear set, and examine the balancer! Both can cause very hard to diagnose problems...
     
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