Confusing Problem
Seasoned HDF Member
Joined: Feb 2007
Posts: 5,067
Likes: 394
From: Edmonton Alberta Canada
Relatively long periods of wide open throttle will reduce engine vacuum which can shut down your petcock if it is the vacuum operated type. Any minor vacuum leak will show up first in these conditions. This condition is usually noticed first on the highway climbing a long incline in top gear.
Check all vacuum lines carefully by spraying with WD40 while engine is idiling (or on a 1994 it's probably a good time to just go ahead and change them anyway).
Check all vacuum lines carefully by spraying with WD40 while engine is idiling (or on a 1994 it's probably a good time to just go ahead and change them anyway).
Road Warrior
Joined: Jul 2007
Posts: 1,898
Likes: 67
From: Saint Amant, Acadiana
Relatively long periods of wide open throttle will reduce engine vacuum which can shut down your petcock if it is the vacuum operated type. Any minor vacuum leak will show up first in these conditions. This condition is usually noticed first on the highway climbing a long incline in top gear.
Check all vacuum lines carefully by spraying with WD40 while engine is idiling (or on a 1994 it's probably a good time to just go ahead and change them anyway).
Check all vacuum lines carefully by spraying with WD40 while engine is idiling (or on a 1994 it's probably a good time to just go ahead and change them anyway).
My carburetor experience is huge but not Harley related. I think HOPTLAP may have nailed it.
Thread Starter
|
Cruiser
Joined: May 2011
Posts: 189
Likes: 1
From: kirkwood mo
Relatively long periods of wide open throttle will reduce engine vacuum which can shut down your petcock if it is the vacuum operated type. Any minor vacuum leak will show up first in these conditions. This condition is usually noticed first on the highway climbing a long incline in top gear.
Check all vacuum lines carefully by spraying with WD40 while engine is idiling (or on a 1994 it's probably a good time to just go ahead and change them anyway).
Check all vacuum lines carefully by spraying with WD40 while engine is idiling (or on a 1994 it's probably a good time to just go ahead and change them anyway).
Thanks
Barry In MO.
Seasoned HDF Member
Joined: Feb 2007
Posts: 5,067
Likes: 394
From: Edmonton Alberta Canada
It does sound like it's starving for gas during periods of sustained high flow, might be worth having a look at that filter just in case.
Second place I'd look is at the carb float, might be catching on something and not moving down fully to let full flow to the float bowl.
Thread
Thread Starter
Forum
Replies
Last Post
M3T4LM4N
Sportster Models
3
Jul 31, 2017 12:53 AM
