Bike Is Dieseling After Shutdown
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Tourer
Joined: Jul 2007
Posts: 387
Likes: 7
From: Binghamton New York
Bike Is Dieseling After Shutdown
Does anyone know why my GF's 2002 sporty 883 is dieseling? It has 3000 miles on er. it runs maybe 2 to 3 seconds after she shuts the run switch or key off. Thanks
Outstanding HDF Member
Joined: May 2005
Posts: 3,146
Likes: 50
From: A barrier island in NJ
RE: Bike Is Dieseling After Shutdown
The first question I'd ask is. "...am I getting junk gas"?
I'd drain the tank and fill it up with 89 or 91 octane name-brand gas (i.e., Shell). I know the 883 only requires 87 octane, but I'd still try it.
I'd drain the tank and fill it up with 89 or 91 octane name-brand gas (i.e., Shell). I know the 883 only requires 87 octane, but I'd still try it.
Road Warrior
Joined: Feb 2008
Posts: 1,337
Likes: 3
From: Houston, Texas
RE: Bike Is Dieseling After Shutdown
Junk gas is starting to be a big problem around Houston. With gas going up everyday, lots of people are going to offbrand gas stations to save 3 pennies a gal. You never know what your getting.[:@]
Outstanding HDF Member
Joined: Aug 2007
Posts: 2,225
Likes: 4
From: fegfsg
RE: Bike Is Dieseling After Shutdown
carbon build up,
check your spark plugs. and run seafoam or techron for a few tanks, see if it gets better.
happens often to bikes that run richer than required. excess carbon builds up. stays hot after igntion is off, and keeps the gas combusting until it stops glowing, which is why it only runs for a few seconds after shutdown.
check your spark plugs. and run seafoam or techron for a few tanks, see if it gets better.
happens often to bikes that run richer than required. excess carbon builds up. stays hot after igntion is off, and keeps the gas combusting until it stops glowing, which is why it only runs for a few seconds after shutdown.
Club Member
Joined: Feb 2007
Posts: 16,320
Likes: 306
From: Boynton Beach, FloriDuh
RE: Bike Is Dieseling After Shutdown
3,000 miles on an 8 year old bike? It's probably protesting about the lack of use, 375 miles/yr. 
Dieseling is usually caused by 1 of 2 things, low octane fuel and/or carbon buildup on the heads. Like Thumper26 said, run a couple of tanks of 91+ octane through it but also add Seafoam to the fuel. You can get it at most auto parts stores and if I remember correctly, you add 1 oz. for each gallon of fuel. The instructions are on the can. Next, take the bike out and run it hard to help burn out what carbon may have built up.
Low octane gas is more prone to carbon deposit buildup than higher octane fuel.
Dieseling is usually caused by 1 of 2 things, low octane fuel and/or carbon buildup on the heads. Like Thumper26 said, run a couple of tanks of 91+ octane through it but also add Seafoam to the fuel. You can get it at most auto parts stores and if I remember correctly, you add 1 oz. for each gallon of fuel. The instructions are on the can. Next, take the bike out and run it hard to help burn out what carbon may have built up.
Low octane gas is more prone to carbon deposit buildup than higher octane fuel.
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Tourer
Joined: Jul 2007
Posts: 387
Likes: 7
From: Binghamton New York
RE: Bike Is Dieseling After Shutdown
Yup! She has been running 87 octain for the last few fillups. I will try some 91 in it to see if that helps. Probably new plugs would be a good idea since they look like origanals to me. Jen is new to the bike and really doesen't give it the throttle like we do. I'll have to take er out for a couple hours to clean er out. Thanx for some good Input from ya all.
Extreme HDF Member
Joined: Sep 2006
Posts: 10,114
Likes: 29
From: Vancouver B.C. Canada
RE: Bike Is Dieseling After Shutdown
The first thing I would check is the idle speed, if it is too high, it will do it, it happened to my 06 1200L before.
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Cruiser
Joined: Dec 2007
Posts: 157
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From: Melbourne,Fla.
RE: Bike Is Dieseling After Shutdown
+1 (all of the above) LOL[8D]
(especially too low octane fuel)
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