Thanks "Stitch", you solved my problem
Thanks Stitch! You analysis of the multiple engine misses was accurate and on the money. And you saved me a ton of money. I installed a new mass air flow sensor and the engine purrs again. You tech guys who volunteer your time and expertise are lifesavers. It might have cost me a few thousand in a dealership to track down this problem in my 10 year old Sentra. Thank you, thank you, thank you!