Slight miss when cruising

dustya_383 said

This all started happening when I filled up last .. It has to be the fuel mixed with weather this week it's been the coldest it's been in a long time ... I'm hoping I didn't accidentally put 87 octane instead if 91 .. I'm gonna try backing total timing down a bit and see what happens .. Maybe throw some 100 octane in there

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Pump the old gas out and use it in your wife's car. Fill it up with fresh pump premium. My 410 is 23* initial, 34* all in at 2200 rpm. 9:1 compression. 91 pump premium. 850 DP, No hesitation or miss, does not miss a beat temp runs at 170* no matter how I thrash on it. 904 RMVB with a continental converter about 4000 Stall. RHS heads from IMM & Small Solid Roller. 242@50 634 lift..