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M7 Motor Issues - Need Help

J

jim

Well-known member
Nov 26, 2007
1,014
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Boise
Buddy has an 05 M7. First he had to put in a new stator. Then he burned down both cylinders on the trail...both at the same time. Sled would run up to mid throttle and then fall on its face. New top end and nobody, including the mechanic the sled with in his shop, can figure out what is wrong. It falls on its face after about 5000-6000 rpms. I think it's going super lean...a fuel issue. But the fuel pressure checks out, power valves check out, electrical checks out. Can the mapping go bad? Could he be starving it at higher throttle? Injectors can't keep up? Whatever it is, it happened to both cylinders at the same time. Why? Help.
 
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