here the deal, had this bird for 7 m,onth sence winter no problems, as soon as july here in utah hit start having my car chug, putt around and then dies an wont start for 30min to 1 hour? it happens after about 30-40 miles of driving when the engine heats up. i changed the fuel filter with a real spendy$$$ filter.still same thing, the old one did have alot of black crud in it? so im thinkin vapor lock? but dont really know, next i guess change the MAP sensor or fuel pump?????

EFI cars with recirculating fuel systems don't get vapor lock.

Does it have spark when it won't start?

Any codes when it won't start?
Have you checked the fuel pressure when it won't start?

got spark, fuel pumps howling just wont start till it cools. have not checked the codes but when it runnin and i look at the tbi the flow looks great and consistent???

Is It The Fuel Pump or Something Else? - Third Generation F-Body Message Boards

these 2 threads are dealing with the same issue on the TPI board. sounds like the exact same issue to me.

Fuel Pump Issues regarding heat??? - Third Generation F-Body Message Boards

Doesn't sound even remotely like the first link.

You've checked spark and fuel pressure when it's not starting?

I had the same thing happen, exact same scenario... even had the same questions.

Last week, I was on my way to fix an AC at a friend's home, when it stalled out.
After a couple years of dealing with this, I pulled out my freon tank and gauges and shot some freon at the base of the distributor, where the ignition module is.
Cooled it right down!
When I cranked it, it coughed a few times then fired right up, and I went straight to get a new module.
It's only been a week, but it's hot as hell here in Vegas, and no problems yet.

sorry, i edited my previous post, the first of the 2 links in my above post was incorrect. the 2 that are there now are the correct ones. seems like alot of people are having the same issue.