Ignition condenser/capacitor.Since my problem was that under full throttle with a warm engine at 3600 rpms the engine would stumble and then after 2 seconds return to running for second and then stumble again. At part throttle there was no problem. First I changed the OPDA, no difference. Then the fuel pump, no difference. Then crank/cam relearn, no difference. Then plugs, no difference. Then coil packs, no difference. Then rebuilt PCM, no difference. I live in Oregon so the best fuel we can get is 92 Octane with 10% alcohol. I heard no knock but just on the off chance the problem was knock I found a gas station with 98 Octane fuel so I tried some and the problem is gone. So I assumed the Jeep had a knock sensor , see attached picture, but according to Jerry, who seem to the reliable source here, the Wrangler has no knock sensor.
My question is what is the sensor in the attached picture?
View attachment 111533
https://www.amazon.com/dp/B00QJAGU54/?tag=wranglerorg-20