87 Olds Calais won't Restart

Both Aunt and Grandmother have 87 Olds Calais that will not restart after driving car on errands, (yes, grandma then walks home). Both cars have about 50,000 miles. The cars will crank but won't fire-up. Thousands of dollars have been spent repairing these cars only to have the symptoms reappear. Have most recently replaced the Crankshaft Position Sensor. The TDD Transmission Direct Drive Soleniod? has also been replaced. Any ideas? The mechanic that replaced the Position Sensor stated that this is typical of the 87 Calais and brazenly called them lemons?

this is a window tinting forum dude. unless it has to do with window film or glass, nobody here can/will help. try another board.

I have lots of ideas.

What? Read before you write!

It could be that his window tint is scratched. I have seen that make my truck not start before. He needs to have it retinted