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FJR Motorcycle Forums
Technical & Mechanical Problems
Does the FJR have a VSS wire?
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<blockquote data-quote="BrunDog" data-source="post: 292423" data-attributes="member: 173"><p>Have any of you guys thought that perhaps it is the vacuum that is the problem, not the tach signal? There is absolutely NO reason on earth why the tach signal would be a problem. In fact, there is nothing fancy about it, it is simply a square wave that the ECU puts out to drive the coil, which in turn generates the spark. Nothing should have changed on this from 05 --&gt; 06/07.</p><p></p><p>If I were you, I would put a vacuum gauge inline with the servo, and watch the vacuum when you drive, engage/disengage the CC, and climb/descend hills.</p><p></p><p>The other thing that comes to mind is the pulley. Perhaps the new pulley requires more torque to rotate it, which translates into more force than the servo can generate, even with strong vacuum? Has anyone tried to measure it, or put on an extension so there is a bigger moment arm and less force required by the servo?</p><p></p><p>There has to be a reason for this, and I will bet my ass it ain't the tach signal.</p><p></p><p>-BD</p></blockquote><p></p>
[QUOTE="BrunDog, post: 292423, member: 173"] Have any of you guys thought that perhaps it is the vacuum that is the problem, not the tach signal? There is absolutely NO reason on earth why the tach signal would be a problem. In fact, there is nothing fancy about it, it is simply a square wave that the ECU puts out to drive the coil, which in turn generates the spark. Nothing should have changed on this from 05 --> 06/07. If I were you, I would put a vacuum gauge inline with the servo, and watch the vacuum when you drive, engage/disengage the CC, and climb/descend hills. The other thing that comes to mind is the pulley. Perhaps the new pulley requires more torque to rotate it, which translates into more force than the servo can generate, even with strong vacuum? Has anyone tried to measure it, or put on an extension so there is a bigger moment arm and less force required by the servo? There has to be a reason for this, and I will bet my ass it ain't the tach signal. -BD [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Does the FJR have a VSS wire?
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