O-k...went home last night. Unplugged MAF lead. Started car...ran fine!! Restarted car 4-5 times...still ran fine. So I reset PCM, and unplugged MAF before initiating the relearning process. Allowed car to idle for 5 minutes with unplugged MAF to insure switch back to default settings. Then did the following (per another thread):
1. Start car
2. Let it idle to warm up (~5 minutes)
3. Take it for a leisurely drive at various rpms accelerating & decerating (3-5 minutes)
4. Get on the car hard at various rpms accelerating & decerating (3-5 minutes)
5. Stop the car & let it idle
6. Turn on the A/C (2 minutes or until idle settles down)
7. Repeat step 3 (A/C is cut off at WOT so step 4 in unnecessary)
8. Stop car and let idle a minute or so
9. Shut off
The result? Car runs waaaay better. Still has slight stumble, but a lot less and only under heavy load (say 1500rpm in 3rd). I'm going to do the spark-plug hunt thing this weekend, and will replace the SP Wires next week (I was going to anyways). But actually going thru the procedures for the PCM to relearn properly gave me a car that runs great!! Except for the intermittant stumble, she pulls harder now.
Great advice!
