next time it wont start try unplugging the tdc aka
cps sensor if it starts up thats the problem and need to replace it... if that doesnt fix it then try pulling of the throttle body and cleaning it real good make sure and take off all the sensors first but be careful your
throttle position sensor has to be adj with a volt meter when you put it back i dont have to do this they did away with that in 91....also try replacing your idle air control motor....
themud