My 97 TJ died

Rondo84

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Joined
Feb 20, 2024
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5
Location
Middletown Ct
Good morning, the other day I started my 97 Tj and it was running great, it was parked on an incline for a couple days ( which is usual) I let it run for about 10 minutes before leaving, I drove for less than a half mile ( without any noticeable skipping,sputtering or any other indicator) when all of a sudden it just puked, I tried to restart it, everything sounded right, but it wouldn’t start. I know I had at least a quarter tank of gas, but I put in another gallon and added some fuel treatment. It still sounds like it wants to start, but no luck. I’ve considered that it might be the fuel pump, but there were absolutely no issues prior. Any suggestions would be greatly appreciated. The vehicle only has 122k on it. Thanks, Ron
 
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No, no movement at all
Based on that my first and top suspicion is that your crankshaft position sensor is bad. The CPS both generates the engine's master timing signal, without which the engine will not run, and also drives the tachometer.

If you can let us know which engine you have, 2.5 or 4.0, and which transmission you have a recommendation for a CPS can be made. :)
 
Based on that my first and top suspicion is that your crankshaft position sensor is bad. The CPS both generates the engine's master timing signal, without which the engine will not run, and also drives the tachometer.

If you can let us know which engine you have, 2.5 or 4.0, and which transmission you have a recommendation for a CPS can be made. :)

It’s a 2.5 with a 5 speed std
 
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It’s a 2.5 with a 5 speed std
The CPS is a critical sensor so I'd make sure to only go with a good brand and no store sensors. Personally I'd go for the Mopar in the below link but the NTK and Standard Motor Products should be fine in the Standard Replacement Section at https://www.rockauto.com/en/catalog...5296,ignition,crankshaft+position+sensor,7196

Pay no attention to the "Possible relearn procedure required" comment next to the NTK, that wouldn't be needed... the engine computer (PCM) will relearn a new CPS on its own.
 
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It’s a 2.5 with a 5 speed std
Ok, here’s where I’m at with the problem, about 6 months ago I replaced the upstream 02 sensor, I found that the connection between the two ends had come apart, I connected it again ( making sure it was connected properly this time) but it still didn’t start, then I checked the fuses under the hood and discovered that the F6 30 amp fuse was blown, I purchased a new one for 6 bucks, installed it and the jeep started for about 3 seconds then fried the new fuse, Does anyone have any ideas ? I used. A digital multimeter to check it and got a reading of 19.6 , What could be causing this ?
 
F6 is the automatic shutdown relay. Have you downloaded the FSM out of the resources section? I'd guess you still have an issue with your O2 wiring. I'd do a continuity and ohm check on the wires.

The 19v is because the ASD sends voltage to the alternator to regulate the voltage.

I think you have a short to ground in the 18dgbk wire...dark green and black.

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-Mac
 
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