Hello everyone, I'm a newbie here.
After having spent nearly $1000 at a local garage shop, I came here to look for ideas. I came across this thread http://bonnevilleclub.com/forum/viewtopic.php?t=81320
which described similar symptoms. So I took a chance and replace my PCM with a rebuilt one and my problem is gone.
Originally, it all started one day when my car would start but stall-out roughly within few seconds. I had it towed to my local garage where a mechanic replaced MAF unit. I picked up my car and found out that MAF wasn't the problem. Had it re-towed and this time, ICM was replaced. The shop mechanic claimed it was fixed after 90 miles of "test driving". I questioned about test driving 90 miles and he said he wanted to make sure it was fixed.
I brought it home and next day, I found out it still had the problem. I went to auto-zone and pickup a rebuilt PCM and replaced it. Since then, I have been using it without problems.
So thanks for this forum and its participants.