My engine (22R) has been racing when I stop to idle for a while now on and off. ('87 Toyota Pickup) It happened when I pulled in front of my garage today coming home from work, so I took the cap off and the throttle plate was full open. That's not supposed to happen, right? What do I do? If I tap the gas it will usually go back down to regular idle until the next time I come to a stop. If I rev the engine up a couple times it usually helps a little for it not to happen again, but also give a few pops out the exhaust as I'm doing it. Come to think of it, it usually gives a small pop as I'm shifting when the engine's cold too.