Buick Century Misfires Cylinder 1 code p0301
I just took my dog for a walk,now my 2000 century 3.1 is missing code p0301,cyl #1 misfire.I had backed in uphill at the dog park,walked her 15-20 mins and came back,car started,but was missing.ses light started flashing.got home scanned,code p0301.looked at wires(pretty new),no sparks or clicking.of course #1 is on back side.have not pulled plug yet.its always been a real good runner.
We live in upper Michigan,was cold for most of winter,now warmer but 37 out today.I am thinking water in gas,slug of water was probably picked up and sent to #1 injector?. added gas dryer,and injector cleaner,drove 10 miles.still missing.150.000 on car,never had any problems before.I remember a few tankfulls back, some snow on gas nozzle at gas station but,just a little bit.too cold that day 0 degrees f. I was cold and in a hurry to get back in car.
any ideas?....drive it a few more miles maybe?....hoping someone in the rust belt can help....thanks,rich.