4runner over reving

Sounds like the cable is getting stuck somewhere....my old hilux used to do that sometimes and there was sand int he cable

spray crc on choke throttle

buy a diesel

didn't they have a throttle stop dampener? Have a lookk there it may be sticking a bit or not working as it should! I used to own one and am sure mine had one on it

Does yours have an air by pass valve for cold start up's? On my Jackaroo it has an air by pass canal on top of the throttle body, with a stepper motor in it (I think this is what it's called). When you remove the stepper motor it has a shaft with a spring on it, and ends in a cone shaped piece of metal. Basically the computer controls it, and the shaft moves in and out, causing the cone part to fit into a seat in the throttle body. Apparently this lets more/less air through to aid in cold start ups.

Sorry for the dodgy explanation but I'm no expert and am retelling what was told to me.

Aaaaanyway, upshot is the shaft/cone gets carboned up over time, which causes the stepper motor to stick, and consequently the engine to rev similar to what you describe. Every 30000k or so, I just pull it out (2 torx bolts), and clean any carbon deposits off with carby cleaner - all fixed.