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129 Posts
Ok first I started my sled tonite and noticed it was idling kind low mind you it was -24c then while it was warming up the engine started to pulse in rpm so I went and gave it some throttle and moved it ahead a bit seemed to be alot of smoke and then it stopped pulsing and idled fine:dunno: and also i checked my coolant earlier and noticed a dark film on top in the bottle and when I opened the cap... does it just need a flush or is there something bigger here have already checked t out a bit doesnt seem to be a haed gasket or anything like that any thought's would be great thank's