i need some help with this problem. it runs fine when cold but as soon as it gets up to normal operating temp it starts missing. it first started acting up after wife stopped and put gas in it. thought she got some water so i put some dry gas and fuel injector cleaner in it. didn't help, put new fuel filter on. didn't help, put plugs in they were needed, did help some, put new plug wires on, did't help. put new o2 sensor on didn't help. got a new engine coolant temp sensor, couldn't figure out how to get old one out. but did start it up and run it with it unhooked and didn't make any difference. so i figured thats probably not the problem. any ideas of help would be greatly appreciated.
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</>after warm up...is it trying to hold 900 rpm at idle?, or is it tending lower, (might need to adjust the idle mix)


or is the "missing" observed more under load? have you checked the dist cap and rotor?, is the vacuum advance working?, etc.


is it running hot?, are you running a stock (OEM) thermostat?


just some of the thoughts that come to mind..... Edited by: glennb