about a month ago I put my Yukon back on the road after a 1.5 year rest. I had to have a rebuilt Trans put in. I had a code for the knock sensors and replaced and that went out. As soon as that went out I got a P 1010 code for the MAF, I tried cleaning with maf sensor cleaning but nothing happened, it was stalling at idle but ran well above 20mph and really good on HWY. I replaced the MAF and cleared code, it coded again and now have P1072 and P1075 O2 sensors. I hate to keep throwing money at things I don't need. Today I cleared the codes after filling it up, I drove on the highway 65 miles and on my way back I filled up after 112 miles, I put in 5.36 gals. that's 20.9mpg. I had set the cruise to 68mph. I can't understand why I'm getting these codes if my MPG is good ? It is still idling rough, I checked my hoses for and cracks for leaks. At this point I'm thinking I may have a bad intake gasket leak from replacing the knock sensors. I have replaced all my coils with MSD high output coils and new 8mm wires. Anyone have any kind of input ? I only have till the end of month for my inspection. Thanks
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