Have not been online in awhile so perhaps you've fixed your car by now............
The Ignition Module (under the coil packs) is also prone to heat-related shutdown.
Get it hot to where it won't start and start pouring cold water on things one at a time. Not sure if it has a cam sensor but even if it did it's not usually used to start the engine.....just time the injectors after already running so I'd look elsewhere.
hi there i just was viewing your thread i guess you were writing about a year ago with a guy having a problem with his 1991 buick regal 3.8l stalling when it was running warm/hotter outside, was just wondering if possibly you could enlighten me about a same similar problem, my vehicle will run fine and not stall when it is colder outside but once it runs warmer or it is hot out it stalls and sometimes will not start until it cools down for a few hours, a few days ago the car would not start and had no spark, the next morning after the car sat all night it started, i changed the crankshaft sensor but could not fine a camshaft sensor, is it possible that my 3.1l multiport is the model that does not have one?