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1990 Jeep Comanche 6cyl. Won't Start? HELP!

Posted By: polar

1990 Jeep Comanche 6cyl. Won't Start? HELP! - 10/23/19 12:11 AM

Was running fine...then did some stick welding to the frame around/behind the passenger side door. Battery was disconnected and welder was grounded to frame.

Now turns over but will not start............replaced plug wires, ECU
Posted By: 4x4Wire

Re: 1990 Jeep Comanche 6cyl. Won't Start? HELP! - 10/23/19 03:47 PM

I would go back to the battery and connections. Clean battery connections and double check/clean the ground binding between frame - chassis - engine. The ground does need a good solid bond free from rust and corrosion.

Then, there is the TDC (Top Dead Center) sensor. With the 4.0l engine, that is a common problem.
Posted By: polar

Re: 1990 Jeep Comanche 6cyl. Won't Start? HELP! - 10/24/19 12:33 AM

Thanks John.

Is TDC sensor same as the Crankshaft Position Sensor??
Posted By: Mike Bondi

Re: 1990 Jeep Comanche 6cyl. Won't Start? HELP! - 10/25/19 03:14 PM

On most engines, they are the same.....Mike
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