What sensors

Whooshka

Fairly faST old guy
Joined
Jan 29, 2017
Messages
1,009
Location
New Jersey
Bike
2006 ST1300
If the sensors were open , or go way out of range, a trouble code would be displayed. Same with the voltage being applied to the sensors. But it's also possible the sensor could shift value and the ECM would have no idea that happened, but then the ECM would think the bike isn't warmed up and that would keep it in "open" loop mode.

Once the plastic is off, it only takes a few minutes to check the sensor resistance, to determine if it's in the ball park or not, and to check the voltage being fed to the sensors.
This is exactly what some "fuel management" devices do. They alter the air temp sensor signal sent to the ECU to make it think it's still cold so it richens the fuel/air mix to make it run less lean. Lean = less fuel = better mileage. Also the more lean you can make it (without detonation) the more power. Also more heat. Old saying... "Lean is Mean".
 
Joined
Sep 10, 2011
Messages
2,211
Location
West Michigan
Bike
'98 ST1100
STOC #
8470
Disconnecting the O2 sensors will keep the mixture rich, too. The ECM thinks the bike isn't warmed up since the it doesn't see the voltage "flipping" between 0.1 volt & 0.9 volt , so it keeps the bike in "open" loop. With most ECM's that would also throw a code, but the bike would still run, but richer.

I'm not recommending that, tho. In my book, "closed" loop is preferred.
 
Joined
Jul 8, 2013
Messages
3
Location
Cheshire UK
Bike
2004 St1300
Hi guys, im hoping that someone can tell me were abouts the throttle position sensor is located? I have the F1 light blinking 8 times and want to check/replace the sensor. I have looked at the manual but unable to find it! any help would be appreciated..........thanks jon
 
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