Question about 1993 Jeep Grand Cherokee

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No power to the coil? New crank sensor, Ecm, coil, distributor parts, and relays.

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Co9l should get power from the alternator while cranking, through the starter relay then switches to power from the engine control unit after startup. Check power at ecu and check over stuff you have installed (sometimes new does not mean it works) then check the auto shutdown relay...if no power coming from there, you won't have spark.

Posted on Jun 26, 2009

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Car cranks but wont start? No spark. Changed ecm relay no help. Ignition harness is good. No fault codes. Battery is good. changed ignition relay, no help. I think its the ECM but need more info to spend...

Yes, the ECM is the last thing to replace after all other possibilities. No spark could be bad ignition coil, bad Ignition Control Module (controls the coil circuits for spark), bad plug wires, the crank and cam sensors (for ECM to determine spark timing).

Check the ICM -it can be tested at a parts store. If good, check the crank sensor.

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No spark installed new coil and had mogel for the distibutor checked

Check fuses relays and ground wires. The check inside the distributor cap and make sure the piece the rotor inside distributor is clean of oil and the area below hall effect is dry and without oil.The piece down below is also a item that can effect it from is a magneto and it controls the firing and fuel by sending signals to the ecm. If you check the above without finding an issue the best thing to do is see if you can borrow a scan tool to get any codes that could be helpful with diagnosing. Im sorry if this isnt exact help but it is trail and elimination that fixes issues like this instead of just replaceing parts.

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No Spark at Distributor Cap when cranking engine

check the ecm module. if its remoted, its on the dr's side fenderwell under the hinge. otherwise its on the distributor body. check cap and rotor, and the pip sensor in the distributor. those components control the spark timing and del. also check eec relay in the box on the dr's side fender. position one is the eec relay and fuse 22 is for that circuit

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1994 corolla dx 1.8l automatic

Have your checked your coils? Never replace parts to try and fix a problem, Find the exact problem and fix it! No spart would be either a bad cam/crank sensor, bad coil pack or ecm fuse!

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Getting gas but no spark;

If your are sure that the ignition module and coil are good,then check your pick-up coil.It is inside the distributor cap,close to the module.The ECM does not produce the voltage to the coil.The voltage comes from the a fused 12v source.

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