First of all i have searched. That being said, My car has always had a problem with the idle. Kinda wanders a little. Codes 21 and 22 would come on once in awhile. I replaced the computer with a reman. unit a few years ago and replaced the TPS with a GP sorenso sensor. it never stopped the wandering idle. Now the other day my car won't start without giving it at least 50% throttle and then it runs really rough and i can smell what i believe to be gas.
And the code 22 came back. I tried to get readings on the TPS and i can't even get a constant voltage off the C wire. Someone please help. Thanks.

 

See my response to this in the TPI forum.