1994 Lexus GS 300 • 6 cylinder 4WD Automatic • 215,000 miles

I have a 94 lexus gs300 I start it in the morning and let it warm up for 10 minutes. As soon as I put it on reverse the car shuts off. I restart it again and begin driving, as soon as I come to a stop the starts shakings and shuts off. About a month ago it will do that and after 10minutes of driving no shut off when I stop, but lately its has been acting like its losing power and continues to shake after it warms up please help

January 28, 2011.

Check and test the throttle position sensor and airflow meter also check the fuel pressure

Jan 28, 2011.