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Electronic fuel injection 101

197K views 65 replies 38 participants last post by  Eric14570 
I appreciate this but it seems there are a variety of code sheets, I have a 2008 sportsman 500 HO that is efi. When I bought her the stator was deep fried, set her back up and we were golden. Took her to work to pull in wire for two days, first day she ran great second day about halfway through she started blinking the battery light. Ran the diagnostic sequence and came up with 51& 58. I have tore into her checked the day it is fine ohmed out the harness on both the injector and the fan and put eyes on it everywhere. I did read a post about some issues with the coil grounding being an issue. I checked that didn’t seem to be loose, I went ahead and cleaned it up and put some star lock nuts to insure connectivity. As for the fan circuit, the fan runs just fine and the harness ohmed and seemed to be just fine as well. I made it to the circuit breaker where I found some corrosion on the studs and the contact on the inside. Ordering one today but other than that I am stumped!
 
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