Jeep engine issues post-PCM replacement

Maintenance/Repairs
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1

Hi folks,

Having some trouble with my 2013 Jeep Wrangler.

It recently started bucking on me at high speeds and when driving uphill, sometimes when the engine changes gears. If I accelerate when the bucking happens, the engine cuts out and the steering column locks up, then it takes 5-10 minutes of rest before the engine is able to turn over again.

The first time it happened I found there were critters building a nest on top of the battery and had it cleared out.

I had the transmission serviced and it’s not a transmission issue.

I took it to the dealer for further investigation and was told the PCM was shorting out. Had it replaced and lo and behold, the issue started happening again today after a couple weeks of smooth sailing.

I’m flipping the jeep soon for a new Subaru and I just need to keep the car on the road for another month or so until the new car comes in, and I feel daft paying even more than I have already for these ineffective bandaid repairs.

If anyone knows what else this issue could possibly be, I’d appreciate some insight and recommendations.

Cheers!

2

I think if I had that problem , my guess would be some sort of problem with the battery power to the rest of the car. I’d put a lab volt-meter (preferably the moving coil type, with the needle that swings as the voltage changes) on the seat next to me so I could monitor the battery voltage as I drove. May have to probe at various places before finding the point in the circuitry the voltage drop-out is occurring.

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