92 Octane and Surge

[Latemarch]

Needed gas and pulled into the station.
There was no 87 Octane :shocked:.
I've always used 87 with no problems at all.
Thought well, I guess I'll just try the 91 and see how she runs.

30mi down the road and I've got a very noticable surge at around 5000 rpm. :gaah:

Now I'm going to have to put up with this untill I get the tank mostly empty and fill it back up with 87 again.:chill:

Fortunately, that'll be this afternoon......heh! It's a great day to ride.

 

[BLACK WIDOW]

Strange

Needed gas and pulled into the station.
There was no 87 Octane :shocked:.
I've always used 87 with no problems at all.
Thought well, I guess I'll just try the 91 and see how she runs.

30mi down the road and I've got a very noticable surge at around 5000 rpm. :gaah:

Now I'm going to have to put up with this untill I get the tank mostly empty and fill it back up with 87 again.:chill:

Fortunately, that'll be this afternoon......heh! It's a great day to ride.

That is pretty strange---Surging usually indicates a lean condition (unless you got a load of water):dontknow:


Michael:doorag:

 

[j45p3r]

Mine ran pretty terrible on the first tank of 91 I ran through it, but after 2 or 3 tanks it runs great now.

 

[BLACK WIDOW]

91 Octane

Mine ran pretty terrible on the first tank of 91 I ran through it, but after 2 or 3 tanks it runs great now.

Maybe it just takes some time for the ECU to learn the change and advance the timing:dontknow:


Michael:doorag:

 

[jwfranklin]

I know before the update I tried a tank of 93 octane, and it didn't seem to run as good.

Wayne

 

[bone crusher]

I know before the update I tried a tank of 93 octane, and it didn't seem to run as good.

Wayne

I've tried 91 and it made no difference (except cost)...