1992 Buick LeSabre - wont start
I have a 1992 Buick LeSabre, 56000 miles. During cold weather it will start like a dream - during hot weather it has difficulty starting. During hot weather the engine will turn over & over, when it does catch, it will "chug" and shake like its about to stall (sometimes it does). Again, this only happens during warm weather.
It is currently sitting in a dealer's repair shop and they are scratching their heads. They have replaced the fuel filter, fuel pump. They have checked the ignition modules - OK. They replaced the spark plugs & cables. They checked the temperature sensor - OK.
I related the story of temp sensor being akin to a choke on carb. A bad temp sensor would restrict the fuel flow beacuse the sensor would think the temp was too hot. This sensor checked OK.
I had a different "national" mechanic shop replace the crank sensor.
By all accounts this car should run. Nobody can figure out why it won't start in warm weather and it will in cold (P.S. I live in Buffalo, NY).
Any help would be greatly appreciated. Dealer is starting to charge me by the hours for a guy to sit and scratch his head!