Cold Stumble

[GaTeach]

Just to let y’all know:

My mechanic determined that the fuel pump was out of its tolerances and if we replaced the fuel pump, the stumble would cease to exist!

He called Honda and got the fuel pump replacement covered under warranty.

I picked SG up yesterday, cranked her, jumped on, and took off. And she immediately stumbled.

But....I have a new fuel pump at almost 80,000 miles and I’ve made a New Fuel Pump Resolution to QUIT running around with that orange low fuel light on.

(And I have no doubt that resolution will last about as long as my New Year resolutions last)

[Zteve]

Should re-name this thread to "LETS GET REAAAADY TO STUMBLE"

[VStarRider]

Should re-name this thread to "LETS GET REAAAADY TO STUMBLE"

Where is the "like" button?

Mine stumbled while making a sharp, low speed left turn in traffic. Not cute.

[tenxxx]

should re-name this thread to "lets get reaaaady to stumble"

like

[Navvet]

Just to let y’all know:

My mechanic determined that the fuel pump was out of its tolerances and if we replaced the fuel pump, the stumble would cease to exist!

He called Honda and got the fuel pump replacement covered under warranty.

I picked SG up yesterday, cranked her, jumped on, and took off. And she immediately stumbled.

But....I have a new fuel pump at almost 80,000 miles and I’ve made a New Fuel Pump Resolution to QUIT running around with that orange low fuel light on.

(And I have no doubt that resolution will last about as long as my New Year resolutions last)

I don't remember, did I stumble walking away from the Taco Bell in Cherokee ???

[GaTeach]

I don't remember, did I stumble walking away from the Taco Bell in Cherokee ???

Wait, was that you in the bed of that pickup ordering nachos grande with extra quacamole?

[53driver]

I've had the 92/93 in for two tankfuls now....no help with the stumble.
I'll try the "no-ethanol" solution next tank.....
Cheers,
Steve

[2wheelsforme]

I have never had a stumble at all but I did appear to get really good gas mileage while in Colorado. I asked a local to high altitude and He said no it was just because I was riding slower. Once got 265 on a tank. Back to sea level and 220 miles tanks have returned. I think either the altitude or the type gas may be the reason.

[3Chief]

I have never had a stumble at all but I did appear to get really good gas mileage while in Colorado. I asked a local to high altitude and He said no it was just because I was riding slower. Once got 265 on a tank. Back to sea level and 220 miles tanks have returned. I think either the altitude or the type gas may be the reason.

+1, gas mileage is back down to normal.

[tenxxx]

The lower octane has a lower flash temp. Dip your finger in it and blow,, gone like alcohol.
!0% ethanol lowers it even more. It burns very fast and a hot spark plug tip can ignite it before the spark gets there.[spark nock]
High octane= slower burn.
High octane higher flash temp. Burns longer and through out the power stroke.
Slower burn = more consistent, efficient flame. The hotter the spark the better the burn.
With high octane gas you can open the spark plug gap to max setting, if yer gonna run it all the time.
But what effect it has on the stumble is a good?