I have an 89 Skylark with a 2.3 Quad motor with 64k. I'm having major overheating/stalling issues. The car will run for about 10 mins, stall, crank over in another 10 mins, and then stall again. I've heard from one (and only one) source that the motor is toast. Others have told me that it could be a faulty coolant temp sensor or igniter module. If you have any ideas, please let me know. Thanks.