Reply to "spark timing"

panteradougMember

In Motorcraft the 32 is cooler than the 42.

Here in the US the 42 usually goes in the 2v carb car like the LTD station wagon and the 32 in the sportier cars with the 4v.

If you go one step colder on the plug you have there will be less white on the electrode. That is probably the correct plug for the car.

You need to be careful with the cross over plug chart now though.

Someone at Motorcraft made a mistake and said that the AF-32 is equal to the AF-42, which it is not.

Unfortunately virtually every spark plug company revised their listings to agree with Motorcrafts. With one exception.

The ONLY chart that is accurate now that I have found is by Champion.

As far as I can tell, the plug that I wound up with is half way in between the 32 and the 42 range.

3/12/144:30 PM

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