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My coolant level is good. I first suspected a head gasket issue. Coolant level is fine and oil is normal color and thickness. Just had oil changed...
Thank you, I appreciate it. I'll try reversing the ignition coils as you suggested. Then I'll look at the plugs.
240k miles, changed spark plugs about 50k miles ago. Upon startup (cold), rattle, shake engine noise. Codes: P0300, P0301 and P0302. Checked...
