Scanner is giving me a code 0102 low signal to MAF vehicle does not have as much power as normal and shifts harder than normal seems like the timming is retarded but im not sure how to check or even adjust timing on a coil pack ignition.I dont think it is the MAF but after erasing codes this seems to keep coming back.I replaced the spark plugs recently and the wires didnt seem to fit as snugly on the plugs as i thought they should .It runs fine at an idle but going down the road it seems to lack the power it had before.