The "S" engines have forged pistons, other engines have cast pistons.
It would be good to have the injecters cleaned & tested to enhance fuel flow & remove a likely variable to inevitable problem solving. Test fuel pressure at the fuel rail too.
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OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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