Here is an update to the issue I was experiencing with the L36:
the problem was with the MAF sensor, as in it was bad. When I first started having the engine miss, it was very intermittent. Then, the miss started to occur more often. At first, I had no SES light which usually comes on when there is an miss. But when the light came on, the code was a "P0102 MAF circuit low input". I sprayed out the sensor with MAF sensor cleaning spray and it did not help. I installed another known good MAF sensor and the car ran fine.
I was about to install new plugs and wires believing that was the problem. With over 124K miles on the plugs and wires, I plan to install new ones anyways.
It is always good to know that I can rely on the advice on here about what to check and fix when I have a problem with the old GP.
