Trace the fire, it comes from the ingnition switch to the computer and from the computer to the coil pack. If you have fire at the coil pack then, it is most likely a crank sensor, if not, it is either the ingnition switch of the computer. My bets on the computer ! Also make sure you got 12 volts, computer has to have to crank !
Hello
The engine
and transmission in this cars drivetrain are fully
electronically controlled by a computer called the PCM (Power Train
Control Module). Whenever a problem like this occurs the computer
stores a record of the problem in the form of a fault code in its
memory, to read these fault codes you must have the systems memory
scanned with a special tool. Once the fault code(s) are read you then
must perform the appropriate diagnostic testing to find and resolve
the problem(s)
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.
SOURCE: 1989 oldsmobile ciera no spark unit cranks fine good fuel presure
most common cause of no spark is the ignition module located under the coil
SOURCE: 1998 chevy c15 5.7 SFI SYSTEM
My truck did this after I replaced the fuel pump. Turned out to Fuel Pressure Regulator. It would crank and crank but never start. It's located underneath the black plastic manifold on the side of the injectors.
SOURCE: 1990 cutlass ciera w/3300 v6, won't start, fuel
If it has spark, the crank sensor is working. If the fuel pressure is 45psi, that's good.
Are the injectors pulsing controlled by the computer?
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