Re: 56 Pat Spark Plugs/points

Posted by PackardV8 On 2009/10/22 10:35:40

Check the ignition timing. Also check for a lean fuel delivery problem. I prefer the AL or Delco plugs over Champion. In fact, i just won't run a Champion plug if trouble is suspected nor on a new tunes up.

Preignition can also be due to gas formulation variations from supplier to supplier and even week by week. I've found that the E85 is the worst. SUPPOSEDLY Marathon is not E85. i NOW HAVE much better results from the Marathon than the Shell V power.

So try a different brand of gas first and check timing. The look for a lean fule delivery problem.