RPMs raise when turning due to the extra strain on the engine caused by the power steering pump.
It compensates by revving higher.
You can sit still and turn the wheel with the engine running and you'll notice the rpm's go up while you're doing it.
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'02 Jeep KJ 4x4- Gone
'92 YJ- lift, swampers, bumpers....yeah, its pretty sweet.
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I also can not be held liable for any jeep breakage or life problems caused due to my advice being taken. 