my idle wont set ive cleaned the isv its buzzing and also disconected the temp sender while doing it but when i replace the sender wire it revs high......

not long ago i brought some injection cleaner same stuff as 10k boost you spray in to the throttle... so i took the pvc off and sprayed through that so it would clean the throttle and it worked! idle was perfect and a few weeks later back to stage 1.....
i have had a new temp sender and that makes no difference.........
would the dealer fix this problem........
any ideas on whats wrong..........
