It would sputtter, backfire, take off like normal, then do it all over again….repeatedly for at least 2 miles until I hit that main trail and it finally died at an idle. I let it sit while I cooled down in the shade and then it restarted fine and got me the 10+ miles back to the truck, hasn’t done it since.
Elev was around 8700ft., Grizz has 715 miles (88hrs) on it, never missed a service, Air temp was in the upper 80’s to mid-90’s.
I’ve done a lot of reading, mostly the searches turn up threads about the rollover vent thing, tank pressurization and boiling gas…I can’t confirm that the gas boils in mine but it does sound like it sometimes when I stop. A couple threads also talked about the TPS.
The person I ride with the most has the same bike but his is the black SE with about 200 less miles…he was with me and did not experience the issue himself.
So, what is known to cause the stalling/sputtering issue on this new a ATV or on the EFI Grizzlies in general? It acted or felt like a spark or fuel pump issue to me, but if the plug were fouled it wouldn’t have fixed itself after a short recess.
Any thoughts?
**In addition to that, both of those bikes started doing the "4wd turn on by itself" thing prior to the trip while loading them on the trailer. I took apart the switches and cleaned them, and they acted fine on the trail.**
