After the brakes done it will crank but will not start

2000 JEEP CHEROKEE
225,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
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XJBACON2000
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I drove it to my buddy's house parked it and left it for brake service after doing brake service it would crank but not start. so I started with the crankshaft position sensor that did not work. I tried plugs and a coil rail same results. I flashed the brain same results as well. somebody please help. thanks
Jan 18, 2017 at 11:56 AM
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CARADIODOC
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What do you mean by "flashed the brain"? Did you do anything that would have removed memory power to the Engine Computer? If so, did you read the diagnostic fault codes first? Have you read the fault codes at all? Do you know how to do that yourself?
Jan 19, 2017 at 5:44 AM
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XJBACON2000
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I reset the brain, no I do not have a code scanner at the moment, but I did install the brain into another Jeep and it cranked and ran just sounded like it had a miss fire to it but no results at all in my vehicle.
Jan 19, 2017 at 4:22 PM
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CARADIODOC
  • ✓Experienced Mechanic
  • 34,414 POSTS
There's nothing to reset in the Engine Computer.

Chrysler makes reading diagnostic fault codes yourself easier than any other manufacturer. Cycle the ignition switch from "off" to "run" three times within five seconds without cranking the engine, leave it in "run", then watch the code numbers appear in the odometer display.
Jan 20, 2017 at 11:14 AM
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