wtnhunt Posted January 13, 2018 Report Share Posted January 13, 2018 Had some issues with the 4 wheeler(04 honda foreman 450) a short while back, could not get it started in the single digits. Pulled the plug and checked for spark and nothing. Caught a warmer day(still was in the 20's but no wind) and still no spark so tried pulling the wires off the coil to see if I could check them with my meter but was unable to them loose so just pushed them back tight. Ended up hitting the start button just for the heck of it and it fired right up. With the warmer weather started it up a few times and rode a little, now back in the teens and single digit windchills it is acting like it is not getting fire again. Kind of tight where the coil is, but wiggled the wires again and actually got one pulled loose, then pushed it back on and still nothing. So figure either the coil itself is bad or the ecm could be bad. I have seen ecm's on cars/trucks act weird with extreme weather. Hate to waste $56 on the coil if it is not bad, but need the bike running and will have to wait for shipping after ordering one, not gonna pay the local shop their rate for a coil especially if it is not the problem. Is it common for a coil going bad to become more fickle in the weather then work ok again once it warms up? North wind this morning has the real feel around 5, wind tomorrow is supposed to shift around out of the south and not be so bitter. Will probably try tomorrow to pull the wires again and see if I can check them with my meter to see if the coil is getting any voltage. Quote Link to comment Share on other sites More sharing options...
wtnhunt Posted January 14, 2018 Author Report Share Posted January 14, 2018 Rolled it out of the shed this afternoon and let it sit in the sun a while and got it to crank up and run. Was in the mid 20's. Ran just fine. Quote Link to comment Share on other sites More sharing options...
Shaun_300 Posted January 15, 2018 Report Share Posted January 15, 2018 I would start by changing the spark plug William. ATV's flood really easy in the cold. And if the plug is marginal you can forget it when it's really cold. Quote Link to comment Share on other sites More sharing options...
wtnhunt Posted January 15, 2018 Author Report Share Posted January 15, 2018 Thanks Shaun. Figured i would at least get some spark with the plug pulled the other day, but good advice to try the plug for sure. Was about 15 degrees yesterday when i went out and it started up and ran ok. Still puzzles me a bit that after messing around with the coil/wires it got spark. Quote Link to comment Share on other sites More sharing options...
russelon Posted January 17, 2018 Report Share Posted January 17, 2018 The regulator/rectifier is somewhat the common problem when there's no spark. Quote Link to comment Share on other sites More sharing options...
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