Ron,
I removed the tie wraps as you said a few days ago, and cleared the “system too lean bank 1” error code. It has not returned. I did another thorough vacuum leak check, with Carb cleaner, (I am not set up to use propane). I found no leaks. I think the restriction I had put on the MAF tube, was just too much, and was the only cause of the error. I believe it is running to strong and smooth, to have a leak. MPG is improving some. See MPG update in groovy vehicle category.
Joe Bryant
Pembroke Pines, FL