possible fuel starvation
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Tourer
Joined: Jul 2007
Posts: 430
Likes: 5
From: Massachusetts
possible fuel starvation
hey all,, I have a 98 fatboy with a new makuni ( about 350 miles ago) carb. I noticed yesterday and today it seemed a little sluggish when cranking on the throttle. like a hesitation. it never did this before. tonight I was riding home and it coughed and died. while costing I let the clutch out and it fired right up. it stumbled once more on the way home. I have 105 miles on this tank of fuel. poped the caps and could see fuel. do ya all think this could be starving because of a dirty filter in the tank? I have a external filter too. it does have a aftermarket manual petcock. any help would be great as I have a 600 mile trip planed to rolling thunder.
Thanks Wils
Thanks Wils
Intermediate
Joined: Apr 2008
Posts: 40
Likes: 0
RE: possible fuel starvation
Hello,
Like outlaw said, check routing for possible heat soak,"vapor lock" check for a kinked line. by all means check ALL fuel filters and pet **** flow.( get a can , turn on the fuel flow and watch.... should flow smooth fast and steady!) if not a problem there, could have gotten an air leak, at manifold or since a new carb was fitted, possibly just came loose.( you mentioned missfire? ) what mod and coil do you have? may be time to update ignition ? start there and give us all an update, and we'll go from there. good luck we all been there.
John
Like outlaw said, check routing for possible heat soak,"vapor lock" check for a kinked line. by all means check ALL fuel filters and pet **** flow.( get a can , turn on the fuel flow and watch.... should flow smooth fast and steady!) if not a problem there, could have gotten an air leak, at manifold or since a new carb was fitted, possibly just came loose.( you mentioned missfire? ) what mod and coil do you have? may be time to update ignition ? start there and give us all an update, and we'll go from there. good luck we all been there.
John
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Tourer
Joined: Jul 2007
Posts: 430
Likes: 5
From: Massachusetts
RE: possible fuel starvation
85fxsb, I have a crane hi-4 and a reletivly new crane coil and plug wires. I pulled the petcock screen it was a little dirty not bad though also pulled the inline filter and left it off. I noticed I had a little air pocket with the glass inline filter do to routing. I re routed the line between the jugs so as the petcock is the highest point. with the inline filter it was the high point. I also put a piece of protective tubing in case it hits the jug. Now I need some fuel and no rain! anybody got other suggestions I am listening.
Thanks Wils
Thanks Wils
Grand HDF Member
Joined: May 2008
Posts: 4,326
Likes: 3,607
From: Picayune, Ms.
RE: possible fuel starvation
Have an 85 FXEF and the same problem; solved by cleaning the vent line comming out the bottem of the right tank. You'll need a fine piece of wire to do this. Try and find some safety wire to do this. It won't break-off. The other end of the vent is inside the right fuel neck.
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