I own a 1995 Toyota Celica GT with 2.2-liter engine, and it recently started shutting off without any notice. I give it about 30 mins and it turns back over. I drive it for about 20 mins and it shuts off again. A friend said it was the ECU not getting power when he checked it so I got a refurbished one to replace it. I installed it and tried driving it again and it does the same thing. My friend has no idea since that seemed to be the problem. Any advice?
On a car this old, a number of factors could contribute to problems such as this. Did your friend connect an OBDI device to read the engine codes? If he did, and the code revealed a faulty ECU, then it's possible you might have gotten a faulty refurbished model. Or that there is a problem in your electrical system that is causing the ECU to short out.
There could be other issues as well, such as a fault in the fuel system, a problem with the electrical system, or something that could be overheating.
It might be time for you to visit a technician. For additional assistance, please find an AskPatty Certified Repair Shop at http://www.askpatty.com/search/?type=all&m=30&q=&keyword= and they can help you diagnose and repair the problem.