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Steve,
Prior to this I would fill up using between 89 and 91 octane thinking that it would ignite better as the MFI Manual suggested. The non ethanol is 90 octane which is pretty close to what I was using.
Could it be that the non ethanol is changing my AFR and making my car more rich as with ethanol we have to run our MFI cars more rich than the 70's?
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