Question about 1993 Jeep Grand Cherokee
Check the ecm fuses if they can't communicate using an obd reader then the ecu isn't getting any power different car company's label them differently but look for the ones that are labeled something like ecu, ecm, engine controller, or something like that I hope this helps
Posted on Oct 22, 2017
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Posted on Jan 02, 2017
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.
Posted on Jan 08, 2009
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.
Posted on Feb 27, 2009
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
Posted on Apr 03, 2009
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