H
Head Tomcat
Guest
Guys,
I am getting the problems sorted out with my good friend?s BB (1999 FI model) and have now eliminated the battery as part of the problem.
Here is where I am now at?
The bike will start with no problem and for the first 5-10 minutes will run and idle as normal. I can detect a somewhat rich fuel mixture as some smoke does come out of the cans and it smells of gasoline. But?.the engine apparently is running fine other than this. It does not stumble nor surge. Just a nice clean idle at 1500rpm as I have adjusted the idle knob on the left side of the engine to sit at this speed.
However, after I run the bike for about 10 minutes and get it warmed up to operating temperature, it will no longer hold the idle. When I come to a stop and let the throttle go?the engine will first go to the idle of 1500 and then in the next few seconds go below that point and stall. If I immediately hit the start button it will crank over and slowly come to life again ? but only if I have the throttle open. It will not come back to life if I simply sit there and not give it some throttle.
After I let it sit for perhaps five minutes it will start, but only with judicious use of the throttle. It will not hold the idle at that point and I must get it above 2000rpm or else it will stall again.
Help!
It seems that some kind of hot run sensor or switch is acting up as the problem only occurs after it has been warmed up. While cold for the first 5-10 minutes it starts and idles quite fine. Only after it reaches operating temperature does it die out. Also, after it dies and sits for a short period of time it will gradually start again?but barely.
Fuel is fresh and clean at 93 pump octane. Battery is a brand new Yuasa AGM 12V model. It fires and runs on all four cylinders when cold, but has this darn problem when hot.
What should I look for?
Thanks so much as always.
Bob in Arkansas
I am getting the problems sorted out with my good friend?s BB (1999 FI model) and have now eliminated the battery as part of the problem.
Here is where I am now at?
The bike will start with no problem and for the first 5-10 minutes will run and idle as normal. I can detect a somewhat rich fuel mixture as some smoke does come out of the cans and it smells of gasoline. But?.the engine apparently is running fine other than this. It does not stumble nor surge. Just a nice clean idle at 1500rpm as I have adjusted the idle knob on the left side of the engine to sit at this speed.
However, after I run the bike for about 10 minutes and get it warmed up to operating temperature, it will no longer hold the idle. When I come to a stop and let the throttle go?the engine will first go to the idle of 1500 and then in the next few seconds go below that point and stall. If I immediately hit the start button it will crank over and slowly come to life again ? but only if I have the throttle open. It will not come back to life if I simply sit there and not give it some throttle.
After I let it sit for perhaps five minutes it will start, but only with judicious use of the throttle. It will not hold the idle at that point and I must get it above 2000rpm or else it will stall again.
Help!
It seems that some kind of hot run sensor or switch is acting up as the problem only occurs after it has been warmed up. While cold for the first 5-10 minutes it starts and idles quite fine. Only after it reaches operating temperature does it die out. Also, after it dies and sits for a short period of time it will gradually start again?but barely.
Fuel is fresh and clean at 93 pump octane. Battery is a brand new Yuasa AGM 12V model. It fires and runs on all four cylinders when cold, but has this darn problem when hot.
What should I look for?
Thanks so much as always.
Bob in Arkansas