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FJR Motorcycle Forums
Technical & Mechanical Problems
Fueling Issue Poll
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<blockquote data-quote="vzhq16" data-source="post: 1465006" data-attributes="member: 98379"><p>Before throwing more parts at the problem, due diligence might save you some $$ as well as time. Making sure the idle speed is set correctly, looking for clogged MAF sensor hose, kinked vent line (pretty common), and a TPS that is properly set. If you replace the TPS, using an OBDII reader, connect the reader, turn on the bike (don't start it) and write down the number at idle and at full throttle. That's the range your particular reader recognizes. When you install the new TPS, rotate it to get as close as you can to those numbers before tightening it down. If you're not replacing the TPS, you can also try to do it by ear. You can hear the pitch change as you rotate the TPS with the bike running. Rotate too far clockwise and the pitch will drop sharply and generate a low voltage error code. To do a rough low range adjustment, just rotate it counter-clockwise a small amount, then tighten it back down. You just want the prongs in the TPS off of the worn spot, or if it was set too low at the factory.</p><p></p><p>Another option might be to send the ECU to Ivan for a tune. His tune kills the programming to cut fuel delivery on decel. It smooths out the transition from closed throttle.</p></blockquote><p></p>
[QUOTE="vzhq16, post: 1465006, member: 98379"] Before throwing more parts at the problem, due diligence might save you some $$ as well as time. Making sure the idle speed is set correctly, looking for clogged MAF sensor hose, kinked vent line (pretty common), and a TPS that is properly set. If you replace the TPS, using an OBDII reader, connect the reader, turn on the bike (don't start it) and write down the number at idle and at full throttle. That's the range your particular reader recognizes. When you install the new TPS, rotate it to get as close as you can to those numbers before tightening it down. If you're not replacing the TPS, you can also try to do it by ear. You can hear the pitch change as you rotate the TPS with the bike running. Rotate too far clockwise and the pitch will drop sharply and generate a low voltage error code. To do a rough low range adjustment, just rotate it counter-clockwise a small amount, then tighten it back down. You just want the prongs in the TPS off of the worn spot, or if it was set too low at the factory. Another option might be to send the ECU to Ivan for a tune. His tune kills the programming to cut fuel delivery on decel. It smooths out the transition from closed throttle. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Fueling Issue Poll
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