when cold the car starts just like it should. run it for a couple of minutes and it begins to run really ruff. missing and sputtering and will not take throttle. then it stalls and will not start. my thought. and trust me i am just guessing. the cold start enrichment circuit is 'sticking'. meaning that the 'choke' is sticking and the thing is running too rich once it approaches operating temperature. is there a way i can disable the cold start enrichment circuit once i have the bugger started and running smoothly? if this cures the problem then i have a clue as how to proceed. thank you. oh, plugs are brand new. ignition wires appear to be fine. no engine light on. am i correct in discounting a faulty o2 sensor? this 'ain't' my car. and would love to get it out of my drive way and back to where it belongs.