twin cam fouling spark plugs
Thread Starter
|
Tourer
Joined: Dec 2009
Posts: 272
Likes: 3
From: Georgia
twin cam fouling spark plugs
My 03 softail keeps fouling the plugs in cold weather. The carbs have been checked at the dealer, new plugs, and the intake manifold gaskets replaced(no difference) but when it is below freezing outside after 10-15 miles it will start missing. Up to that point it runs perfect but it will skip like its not getting spark and running on 1 cylinder. It runs really rich at that point of course puffing black smoke at idle. In the warm weather it runs perfect. The dealer suggested possibly a crack in the crankshaft position sensor but said they couldnt tell for sure till it was acting up. Left it with them over night and they put 2 miles on it and said it run fine. I am at a loss. Any suggestions before I order a cps?
Outstanding HDF Member
Joined: May 2005
Posts: 2,525
Likes: 4
From: Montreal, Canada
Just curious. You say the carbs have been checked. Do you have a 2 carb set up?
Also. When below freezing. What is your start up proceedure. Ex; full choke, 1 twist of the throttle etc...
Also. When below freezing. What is your start up proceedure. Ex; full choke, 1 twist of the throttle etc...
Thread Starter
|
Tourer
Joined: Dec 2009
Posts: 272
Likes: 3
From: Georgia
I dont remember right off. The dealer checked the jets and adjustments on the carb and said it was fine. I rode it to work yesterday morning below freezing and it fouled the plugs after about 20 miles, I cleaned them and rode it this morning at around 38 degrees and it ran perfect.
Sponsor
Joined: Dec 2007
Posts: 12,084
Likes: 829
Trending Topics
Ultimate HDF Member
Joined: Jan 2008
Posts: 6,532
Likes: 132
From: SoCal
Does your bike have a temp controlled warm up enhancement , I think I remember my last stock carbed(and stock a/c) bike having a temp controlled flap that would speed up the warm up process, if the temp dropped below a set temp, by pulling in air that is next to the cylinder thru a little window about the size of a stamp. If you have this setup maybe the flap is sticking in the warm up position and not opening even when it supposed to. I don't know if this would choke off some of the airflow or not. But it does sound like a temperature based problem. Been so long since I've seen a stock a/c I can't remember much about them.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
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
fuel injection fouling plugs
what if its a fuel injection fouling the plugs runs like its on one cly. front cly. gets fire. but does not get hot just warm rear gets hot . can you give me ideal whats up
Last edited by tom crow; Jun 13, 2012 at 03:10 PM. Reason: add more to it
Thread
Thread Starter
Forum
Replies
Last Post
