Getting a P0171 and P0174 lean codes after a Seafoam intake treatment, repairing a crack in the intake resonator, and cleaning the MAF. Had no codes prior. I reset the adaptive values after this but the codes came back. Truck otherwise is running smooth (and peppier than before the above items were addressed). Double checked the intake hoses and vacuum hoses for leaks and found nothing. Understand fuel trims should be looked at. Fuel trims while cruising at constant throttle and light load are approx 7% long term and 2% short term. Off throttle coasting long term will increase to 13-14%. Anything else obvious I should be looking at before I throw a new MAF at it?
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