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Do you recall the code numbers?
Was any diag done prior to replacing parts to see if either sensors were even to blame?
Was the fuel pressure checked?
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There are no recalls on this concern. I would need to know the codes stored to see if there are TSBs or SSMs for this concern. Your correct if these MAF and CKP sensors keep returning then its likely electrical or the computer. Fist you mentioned the CKP sensor then a bit ago you mentioned the CMP sensor. This engine is known for the cam sensor synchronizer failing. Do you know what the MAF sensor readings are as well as the O2 sensors, and fuel trims?