SOURCE: Replced the cap & dist coil pac has fire no spark to spark plug
install the new rotor, if that isn't it check the crankshaft position sensor.
SOURCE: no start. i have gas, spark and injector pulse
yes it would due to timing if the sensors are bad the engine want start due to timing
SOURCE: 1996 Jeep Grand Cherokee No Start
I would be thinking that there is a good chance that you need to be checking out replacing the computer, if you aren't getting any communication with the proper scan tool then the computer isn't communicating with anything in the vehicle...... I would have guessed first off that the ignition control module might be bad but that is obviously part of the computer also, I would be looking in that direction.
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