I originally had starting problems in my 1993 F150 4.9L because of the aftermarket Viper alarm system which I completely removed. Sometimes the truck would immediately start up five or more times in a row. I drove it 5 miles, when I turned the engine off it wouldn't restart and still won't. I am getting 12V at the coil input but it doesn't pulse when the engine turns over (subsequently no spark). This problem has been intermittent but is a constant problem now and is driving me crazy.
I thought I'd replace the ECM unit but can't find it (the chilton manual calls it a PCM also). The Chilton manual (not a good manual by my estimates) claims it is on the drivers side of the engine firewall. I can't find it, help I am becoming suicidal.