Jeep revs itself at startup and intermittently - also, code P-1494.
As of about a week ago, every time I start my Jeep it revs itself up to about 2k RPM before settling back in around 750. If I just sit at idle, it'll stay there for a while and then climb back up to about 2k again. It went almost up to 3k once. Then it alternates back and forth.
If I drive, it does the same thing; I was cruising by a shopping plaza a few days ago, so I was just coasting in second without touching the gas, as there were a lot of pedestrians around, and all on its own the Jeep revs up and exceeds 15mph when I had been going about 5mph through the foot traffic. I don't notice it once I'm beyond second gear, 'cause stepping on the gas doesn't do anything above second gear anyway.
1) The only code on there has been on there for about 2 years, and I never bothered to fix it. P-1494. Leak detection pump? Don't think that's related.
2) About two weeks ago, about a week before the Jeep started throttling itself, I noticed that the clutch pedal started to click when I depress it - but only sometimes. Probably unrelated. I did have the clutch replaced recently though.
3) It's not as though the cable is sticking. The Jeep revs itself without me touching the gas pedal, and it'll alternate back and forth without me touching the pedal.
4) Maybe I need to clean out the throttle body? Sensor telling the computer the engine isn't getting enough oxygen?
#4 is my best thought and if cleaning out the throttle body doesn't make any difference I s'pose I'll try to track down that code. Anyone have any better ideas?