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.

 

Check the fuel pressure at the fuel rail (there is an article on the main page of this site that tells you how to do this).

Also, check the resistence of the fuel injectors with an ohm meter. See if there are any big variations in the readings... this indicates electrical failure of an injector.

Hope this helps.

 

How do i test injectors with OHm meter? Does a VOM work with ohms?