When my MAF went bad at 1st it was intermittent and then it was done and rand like total crap....wouldn't go over 20 mph. Another thing you may want to look at is the fuel pump...mine failed last Fall. The symptoms were very similar...started right up but after it ran a while it would shut off and would not start back up for a few minutes. I do have a in-car fuel pressure gauge so I was able to tell the pump was failing when I saw the fuel pressure fall to 20-15 psi before it cut off. At 1st I didn't even consider the fuel pump but I just happened to look at my fuel pressure gauge when it was shutting off and saw the falling pressure. If I didn't have the gauge I'm not so sure I would have figured it out so quick especially since my pump was new with only about 400 miles on it. Might be worth looking at.
Scott
I"ll check that stuff before I spend more cash on a crank sensor. My FP guage is under the hood but it will reach out to the windshild. Where the heck can you still find good reliable MAF's? I've heard the aftermarket stuff is like a 1 in 10 chance of being a turbo buick one. LOL I just rememberd I have two turbo cars... I suppose I could swap them out:smile: