I was wondering is there any difference that they put on 6.5L turbo's between the half tons and the heavier trucks. I heard once on the old 6.2's that something was different between the the light trucks and the heavy trucks
so what i'm understanding is the F engines are in the heavy trucks and the S engine is in the light trucks. The S engines have pollution control and the F engines don't. I had problems with the egr on my 1/2 ton. Am i assuming right?
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