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FJR Motorcycle Forums
Technical & Mechanical Problems
Bike Stinks
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<blockquote data-quote="ionbeam" data-source="post: 797012" data-attributes="member: 277"><p>If the smell is indeed <span style="color: #0000ff">"the typical catalytic converter rotten eggs smell" </span><span style="color: #0000ff">the root cause is a very rich exhaust. Bad gas shouldn't cause this. If it only occurs when cold it probably isn't a problem. If it occurs once fully warmed up it may be worth looking at as an indicator that something isn't working correctly. If the ECU fails to read the intake air pressure sensor correctly, incorrectly reads the intake air temprature or the ECU does not know that the </span><span style="color: #0000ff">thermostat opened</span><span style="color: #0000ff"> it could cause rich running. The O</span><span style="color: #0000ff">2 </span><span style="color: #0000ff">sensor should not play a role in this because there is a fairly narrow operating range where the ECU runs in closed loop.</span></p><p></p><p><span style="color: #0000ff"> </span></p><p></p><p><span style="color: #0000ff">Have you noticed a drop in gas mileage over several tanks to indicate that </span><span style="color: #0000ff">you are</span><span style="color: #0000ff"> your FJR is running very rich?</span></p></blockquote><p></p>
[QUOTE="ionbeam, post: 797012, member: 277"] If the smell is indeed [COLOR=#0000ff]"the typical catalytic converter rotten eggs smell" [/COLOR][COLOR=#0000ff]the root cause is a very rich exhaust. Bad gas shouldn't cause this. If it only occurs when cold it probably isn't a problem. If it occurs once fully warmed up it may be worth looking at as an indicator that something isn't working correctly. If the ECU fails to read the intake air pressure sensor correctly, incorrectly reads the intake air temprature or the ECU does not know that the [/COLOR][COLOR=#0000ff]thermostat opened[/COLOR][COLOR=#0000ff] it could cause rich running. The O[/COLOR][COLOR=#0000ff]2 [/COLOR][COLOR=#0000ff]sensor should not play a role in this because there is a fairly narrow operating range where the ECU runs in closed loop.[/COLOR] [COLOR=#0000ff] [/COLOR] [COLOR=#0000ff]Have you noticed a drop in gas mileage over several tanks to indicate that [/COLOR][COLOR=#0000ff]you are[/COLOR][COLOR=#0000ff] your FJR is running very rich?[/COLOR] [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Bike Stinks
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