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Help Please

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Old 02-15-2016, 06:04 PM
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2000 4.7 Grand Cherokee.
Yesterday I lost oil pressure while driving, oil was at the add line, I topped off and got 5 miles than check engine came on. Code P1391, I have now changed both cam and crank sensors, oil pressure and TPS and even ECM.
Engine starts but rough with a top end tap at idle, WOT engine runs smooth.
Keep getting p0340. Please any thoughts
Old 02-15-2016, 06:23 PM
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P0121 keeps coming back not 0340
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