SOURCE: 93 Jeep Grand Cherokee Won't start
Are you getting spark from coil wire when cranking? If so, check the cap & rotor. If not, the most common failure is the crank sensor. If you have a 4,0, you can find it on the drivers side of the bellhousing, in line with the flywheel, just where it's annoying to work on. There is a test you can make, but I don't have the specific test values or the correct terminals to check. (you can find that info in any half decent manual.
Good luck
SOURCE: 1993 grand am no spark
You said you changed the ecm module, is that the ecm or the ignition module. Do you have access to a scanner to check cranking rpm? That way you can test the new crank sensor and the wiring and the ignition module.
SOURCE: 89 jeep cherokee 4.0 cranks and gets fuel but no
the part that is known to fail in these engines that causes no spark is the Crankshaft position sensor, it is located on th right side of the bell housing as u stand in front of truck, it must be changed from below the truck and is very difficult to get at, here is a photo of the sensor and a brief description of the repair
172 views
Usually answered in minutes!
×