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FJR Motorcycle Forums
Technical & Mechanical Problems
Engine dies when hot, slow moving, uphill, at elevation (KrZy8)
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<blockquote data-quote="RossKean" data-source="post: 1368053" data-attributes="member: 19880"><p>You could have 13.5V up to the point the reserve capacity of the battery is gone. The AGM battery is capable of putting out lots of amps while maintaining fair voltage UNTIL it is approaching empty. I think you need to ride under the problem conditions with an ammeter on your system. See if there is net discharging. If so, you might manage 13+ volts until the battery runs down. Stopping for a little while (or a short higher rpm run) would likely allow the battery to "recover" enough to start it up again. I agree with Fred that 12 V will still run the FI system (and ECU and fuel pump) adequately but maybe it's dipping lower than that??</p><p></p><p>I have to think that the performance issues are related to the voltage stuff - either the system just doesn't charge things sufficiently or there is some sort of big electrical load (short?) that shouldn't be there. Again, the ammeter while running would be a big help.</p></blockquote><p></p>
[QUOTE="RossKean, post: 1368053, member: 19880"] You could have 13.5V up to the point the reserve capacity of the battery is gone. The AGM battery is capable of putting out lots of amps while maintaining fair voltage UNTIL it is approaching empty. I think you need to ride under the problem conditions with an ammeter on your system. See if there is net discharging. If so, you might manage 13+ volts until the battery runs down. Stopping for a little while (or a short higher rpm run) would likely allow the battery to "recover" enough to start it up again. I agree with Fred that 12 V will still run the FI system (and ECU and fuel pump) adequately but maybe it's dipping lower than that?? I have to think that the performance issues are related to the voltage stuff - either the system just doesn't charge things sufficiently or there is some sort of big electrical load (short?) that shouldn't be there. Again, the ammeter while running would be a big help. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Engine dies when hot, slow moving, uphill, at elevation (KrZy8)
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