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First off, thanks for the replies. I am not a mechanic by trade. Just a guy who has always worked on my own vehicles. I appreciate the help.
The code was P0105. Engine is the V6. As I said, I could clear the CEL, but no matter which of the three MAFs I tried, it would return within a few miles. Reading up on this failure, vacuum leaks seemed to be the main cause. I looked over the intake snorkel for cracks or other trauma, but it was in good shape. Moving up to the front of the engine, I found that I had damaged one of the vacuum lines that run from the base of the intake manifold to (I believe) the EGR solenoid. It happened during the water pump repair. These lines were old and gummy, so I replaced all that I could reach without pulling parts off the engine. There are only two i couldn't reach, and they looked better than the ones I replaced. I will keep my eye on them.
At this point, I have test driven about 30 min, and so far so good. LT fuel trims have crept back down from 17.XX to 12.XX on each bank. I expect to see them below 10% in a day or so if all goes well.
Confidence is high. Wish i didn't buy a brand new MAF so soon. Let this be a lesson for others!
Thanks again.
Craig
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