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#12
02-24-2021, 09:31 PM
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Not all of the fen 4 LS engines have AFM. And afm is active fuel management, or dod which us displacement on demand, it was the system that shut off 4 cylinders. The engines themselves are fine, but around 125-150k miles the special lifters for the afm tend to fail, turn in the lifter bore, and wipe out cam lobes. You can have it electronically disabled, or change the cam and lifters out to a mon afm setup and tune it out to have a better engine than the gen 3's.
As to the Fords of that gen, many spit spark plugs out, or seized in the head and broke off, or you lose coils. I've seen some run for alot of hard miles, but I would consider them an exception to the rule.
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