Dieseling?
Thread Starter
|
Cruiser
Joined: Jan 2010
Posts: 135
Likes: 0
From: NW FL
Dieseling?
Was putting around on the scooter yesterday and after about a 10 mile run, I pulled into a store and hit the kill switch. The bike shut down, then proceeded to give 2 or 3 more revolutions.
This has happened three times now. Anyone know what might be causing this?
This has happened three times now. Anyone know what might be causing this?
Road Master
Joined: May 2009
Posts: 817
Likes: 1
From: N.E. Ohio
Funny my bike never does. The other day it did it once while out riding around. Hasn't done again. I know the change the gas from summer to winter around here. usually run Shell or Sunoco both 93 octane.
Banned
Joined: Sep 2009
Posts: 7,580
Likes: 7
From: The Internet (& Dyer, Indiana)
Definately run some good gad (if you are not already) before you start jumping thru hoops in troubleshooting. BP 93 is my fave, Shell is my second.
But if he's already into dieseliing, I'd bet he's got carbon built up from the oil breathers putting oil right into his Throttlebody. I always did think that was a poor setup from HD.
But if he's already into dieseliing, I'd bet he's got carbon built up from the oil breathers putting oil right into his Throttlebody. I always did think that was a poor setup from HD.
Elite HDF Member
Joined: Sep 2007
Posts: 4,468
Likes: 12
From: Bluffton, South Carolina
Besides the above, check your idle speed, if it too high your engine will diesel. Possible causes are throttle cable too tight, throttle friction set too tight, or in need of lube holding the throttle slightly off of the stop. Air leak raising the idle RPM and also causing a slightly lean condition.
If you want to get the carbon out of the cylinders/heads an old trick it to ride the bike and get it good and warm. Then remove the air cleaner and take a spray bottle of water, start the engine, have a buddy hold it at about 2,500-3,000 RPM's and SLOWLY spray some water into the carb. The engine will bog down so between metering the amount of water and throttle setting you can keep it running. The water going into the hot cylinder will cool the carbon and it will flake off of the cylinder without doing any damage to the engine. I suggest changing the plugs after doing this as sometimes a flake of carbon can lodge between the center and ground electrode. If carbon is the culprit then it might be time to do a top end job as worn parts in that area can/will cause carbon build-up. Running way rich will also cause carbon build-up from unburnt fuel and accelerated ring wear(cylinder wash down).
In closing as stated by others Sea Foam is a terrific product too. Hope this helps!!!!
If you want to get the carbon out of the cylinders/heads an old trick it to ride the bike and get it good and warm. Then remove the air cleaner and take a spray bottle of water, start the engine, have a buddy hold it at about 2,500-3,000 RPM's and SLOWLY spray some water into the carb. The engine will bog down so between metering the amount of water and throttle setting you can keep it running. The water going into the hot cylinder will cool the carbon and it will flake off of the cylinder without doing any damage to the engine. I suggest changing the plugs after doing this as sometimes a flake of carbon can lodge between the center and ground electrode. If carbon is the culprit then it might be time to do a top end job as worn parts in that area can/will cause carbon build-up. Running way rich will also cause carbon build-up from unburnt fuel and accelerated ring wear(cylinder wash down).
In closing as stated by others Sea Foam is a terrific product too. Hope this helps!!!!
Cruiser
Joined: Feb 2010
Posts: 105
Likes: 0
From: north eastern Pa.
The CRAPPY gas lately will do a LOT of stupid stuff, so think of that first.
Try a different brand. Run that tank dry, leave the clutch out a tad to drag the engine when shutting it off til the bad Sheet is gone.
If'n you think you got carbon here's an Ol' time fix I've used a few times.
Get that bad boy HOT, run it til it;'s sweating!!
Take the air filter off, and keep gooseing the throttle while sparying a mist of water into the carb intake, (I use a old 409 spray bottle).
It'll cough, sputter and generally not like it.
The idea behind it, (they still use this on farm tractors)
The carbon get's hot and starts to glow red. This ignites the fuel and knock, rattle you got post ignition. Bad for yer motor.
The water hits the HOT carbon and it flakes off and out the exhaust it goes.
Ever take a motor that has blown a head gasket and sucked in coolant?? The piston is spotless.
Joe
Just an old guys ideas, should be taken with 2 beers!
Try a different brand. Run that tank dry, leave the clutch out a tad to drag the engine when shutting it off til the bad Sheet is gone.
If'n you think you got carbon here's an Ol' time fix I've used a few times.
Get that bad boy HOT, run it til it;'s sweating!!
Take the air filter off, and keep gooseing the throttle while sparying a mist of water into the carb intake, (I use a old 409 spray bottle).
It'll cough, sputter and generally not like it.
The idea behind it, (they still use this on farm tractors)
The carbon get's hot and starts to glow red. This ignites the fuel and knock, rattle you got post ignition. Bad for yer motor.
The water hits the HOT carbon and it flakes off and out the exhaust it goes.
Ever take a motor that has blown a head gasket and sucked in coolant?? The piston is spotless.
Joe
Just an old guys ideas, should be taken with 2 beers!
Trending Topics
Seasoned HDF Member
Joined: Aug 2007
Posts: 8,195
Likes: 3,085
From: NW AR
The other "old tyme" way is to put a vacuum line in a bottle of water while the motor is running. You could disconnect the line going to the vacuum switch at the intake manifold and use that.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
The Best and Worst Harley-Davidson Moves of 2025
Verdad Gallardo
Thread Starter
|
Cruiser
Joined: Jan 2010
Posts: 135
Likes: 0
From: NW FL
Well, it finally did it again since the first post in this thread. Only about the third time since the start of this thread. Anyway, I was wondering if anyone had any grief about running RESTORE engine treatment in the engine. I figure I have some low compression, oil consumption, and am going to need a rebuild in about 20k, so what do I have to lose by NOT running it at this point?
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
Some years ago I swapped bikes with a friend. Mine was a trusty and much loved bike, which he proceeded to thrash down the road on. Imagine my horror when, from a distance, I watched as my bike belched smoke and red burning particles out of the exhaust! Ran much better after that.
So the simplest and cheapest thing worth trying is a decent long ride, to get the bike up to operating temperature, then give it max rpm in the lower gears a few times, to see if it clears its throat!
So the simplest and cheapest thing worth trying is a decent long ride, to get the bike up to operating temperature, then give it max rpm in the lower gears a few times, to see if it clears its throat!
Last edited by grbrown; Oct 16, 2011 at 09:03 AM. Reason: Grammar!