hard starting cavalier

[ryanpyan]

I have a 02 cavalier recently had a o2 sensor installed to pass safety test, after that car is hard to start when it is hot. took it back to mechanic , put in new spark plugs same problem. Then i took it to dealer and they cannot find any thing wrong. what is my next step. This problem did not exist before the o2 sensor was put in to remove the check engine light.

[Offroad]

Cavalier experts are over at www.jspeed.ca i'd giver' a try over there :devil:

[Unknown303]

Problem is that no one is ever online of that forum. i usually put problems up here since it takes days to sort them out on jspeed