Backfiring in carb
#1
Backfiring in carb
Posting for a friend. He has a 1997 Electrica Glide with only 7200 miles on it . I changed all the fluids & plugs . Front plug was fine white ash in color ,rear plug was jet black .Bike has been sitting for over 8 years .
The two problems I am in countering are the bike is backfiring through the carb as soon as you close the choke . Second is the fuel gage is showing empty when full.
Any help would be great !
THANKS IN ADVANCE .
The two problems I am in countering are the bike is backfiring through the carb as soon as you close the choke . Second is the fuel gage is showing empty when full.
Any help would be great !
THANKS IN ADVANCE .
#3
Join Date: Nov 2008
Location: Vancouver Island British Colombia Canada
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The passages in your carb are plugged with old gas gum & altering your fuel air mixture. you can attempt to scrub your system with a full can of sea foam or you pull your carb off & clean it.
You should also pull your intake off & replace the 2 gaskets. You might have a vacuum leak there!
Look for a ground wire off for your fuel guage. Located near your filler cap if you have a dash on the tank.
You should also pull your intake off & replace the 2 gaskets. You might have a vacuum leak there!
Look for a ground wire off for your fuel guage. Located near your filler cap if you have a dash on the tank.
#5
STOP! You have an intake leak when one cylinder is running lean and one is rich. The two seals on the intake, one to each cylinder is a common air leak point and causes just the situation you explained!
Everyone wants to rip carbs apart as soon as a bike doesn't run right. You can mess up a carb in a blink and have to have a pro reassemble it to get it back together right.
Read here (use the search tools or google your issue). There's a few hundred conversations already in the archives that you can get more details from.
Everyone wants to rip carbs apart as soon as a bike doesn't run right. You can mess up a carb in a blink and have to have a pro reassemble it to get it back together right.
Read here (use the search tools or google your issue). There's a few hundred conversations already in the archives that you can get more details from.
#6
#7
Join Date: Jan 2011
Location: Southeast Michigan 15 Minutes East Of Hell
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+1 .... Yep .... Sounds likes an intake leak could be your problem ... check it with a shot of carb cleaner sprayed at / near the connections to the cylinder head and / or boots ... if it increases the idle speed ... BINGO ! you just found your problem ... try and avoid the spray reaching the carb intake as this will give a "false reading". Good luck
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#8
#9
Join Date: Dec 2010
Location: Coromandel Peninsula New Zealand
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Just my 2 cents, but it could be a sticking intake valve. That is the only thing I can think of that would cause backfiring through the carb. I would not think an air leak would cause that. I would dump about 4 ounces of Marvel Mystery oil in the gas tank, and run it for a while.
#10