EEC issues, fuel drip from Active Carbon Can
Posted: Mon Jun 29, 2020 2:05 am
After a long ride today, I discovered gasoline dripping on to my exhaust.
That's NEVER a good thing!
Took off some panels and did some poking around. The only possible place the drip could have been coming from is the "Active Carbon Can", which is part of the Evaporative Emissions Control system.
I'm not at all an expert, but from what (little) I do know, the function of the EEC system is to vent the fuel tank vapors (from evaporation, hence the name) back into the intake manifold, rather than to the atmosphere.
Vapors. Not liquid gasoline.
Upon doing more research, it appears that the main cause of liquid gasoline getting into the carbon canister is overfilling the tank. (note: that's not Buddy or even scooter-specific information, just what Google spat out when I asked it why there was fuel in my carbon canister.)
NOW... it's entirely possible I had overfilled my tank, because:
(a) that's easy to do on a scooter - it doesn't click off the pump like a car does
(b) I had gotten gas about 2 miles before the end of my last ride
(c) It was about 20F warmer today than when I bought gas (80F vs. 100F)
(d) It was only the 2nd time I'd bought gas since I purchased my Buddy
SO... my first question is... Is my diagnosis of "overfilled gas tank" correct?
And if so... what is the proper stopping point when filling my Buddy's gas tank to prevent this from happening again in the future?
As always, thanks in advance!
That's NEVER a good thing!
Took off some panels and did some poking around. The only possible place the drip could have been coming from is the "Active Carbon Can", which is part of the Evaporative Emissions Control system.
I'm not at all an expert, but from what (little) I do know, the function of the EEC system is to vent the fuel tank vapors (from evaporation, hence the name) back into the intake manifold, rather than to the atmosphere.
Vapors. Not liquid gasoline.
Upon doing more research, it appears that the main cause of liquid gasoline getting into the carbon canister is overfilling the tank. (note: that's not Buddy or even scooter-specific information, just what Google spat out when I asked it why there was fuel in my carbon canister.)
NOW... it's entirely possible I had overfilled my tank, because:
(a) that's easy to do on a scooter - it doesn't click off the pump like a car does
(b) I had gotten gas about 2 miles before the end of my last ride
(c) It was about 20F warmer today than when I bought gas (80F vs. 100F)
(d) It was only the 2nd time I'd bought gas since I purchased my Buddy
SO... my first question is... Is my diagnosis of "overfilled gas tank" correct?
And if so... what is the proper stopping point when filling my Buddy's gas tank to prevent this from happening again in the future?
As always, thanks in advance!