Question about Harley Davidson Motorcycles
I RODE ABOUT 100 MILES NO PROBLEMS AFTER BIKE SAT FOR ABOUT 4 MONTHS. THE NEXT DAY I FUELED UP AND BIKE STARTED BACKFIRE AND STALLED GOING DOWN THE ROAD. CHANGED THE PLUGS, REMOVED ALL THE GAS. ADDED NEW GAS AND FUEL INJECTOR CLEANER. BIKE WOULD IDLE FINE. TRY TO RIDE STARTS BACKFIRE AND STALLS. WONT START BACK UP. LET IT SIT FOR AWHILE IT WILL START AND IDLE GIVE IT GAS RUNS FINE. START TO RIDE AND BACKFIRE AND STALLS
Hi, Virgil the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture ***** improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. The gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue and valuable "FREE" downloads that you need please click on the links below and for specific information or questions, please feel free to contact me at firstname.lastname@example.org Good luck and have a nice day.
Harley Davidson Manuals Mark Workshop
Owner Manuals Harley Davidson USA
Instant Tech Relief A must have !!! only$6 a month "CHEAP"
Posted on Apr 19, 2016
Possible Intake boots leaking causing a mistfire and running lean. Make sure you run the harley plugs. Is there a power commander on it ? If you do they are known to go bad and mess up runablilty.
This may be a long shot but since you have the magnelli marelli fuel injection system , you might need a hot/cold idle adjustments and clean out the inside of the throttle body.
Posted on Nov 28, 2013
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
New users get 2 Free calls (no credit card required) and instant help on almost anything you can think of (from cars to computers, appliances, handyman, and even pets).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
There may not be an in-line fuel filter on the bike. Most bikes don't come with them. Yes, the fuel petcock has two screen filters on one pipe and they can get clogged up. Remove the tank then remove the petcock and clean it. The gas in the tank should be dumped into a clear plastic storage bin so that you can see if there is any water in the gas as well as rust and trash. Your bike is 15 years old and the inside of the tank may be rusty. If so, Google “ kreem fuel tank liner “ or go to
This will end the rust problem. Go ahead an install an in-line fuel filter. There is a drain plug on the lower left side of each carb. Drain each carb into a clear container and look for water and trash. You may need to clean the carbs but hold off to see if the other stuff fixes the problem.
Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock.
Please top rate this answer. Thanks!
Posted on Jun 04, 2009
I would suspect that the float is sticking. Checking will require removal of (in order): seat, tank, air filter box/backing plate, and finally, the float bowl at the bottom of the carb. Insure that the float is not flooded, and that the float needle is free of trash.
Posted on Oct 28, 2010
Tips for a great answer:
Jul 12, 2013 | Motorcycles
Aug 31, 2012 | 2008 Harley Davidson FLHR Road king
Mar 26, 2012 | Harley Davidson FLHRCI Road King Classic...
May 12, 2011 | 2009 Harley Davidson FLHR Road King
Mar 25, 2011 | 1996 Honda CB 500
Aug 30, 2010 | 1996 kawasaki VN 800 Vulcan Classic
Jan 26, 2010 | 2004 Harley Davidson FLHRCI Road King...
Jul 09, 2009 | 2006 Harley Davidson FLHR Road king
Feb 11, 2009 | 1996 Jeep Cherokee Country
Jul 17, 2008 | Harley Davidson Harley-Davidson Motorcycle...
331 people viewed this question
Usually answered in minutes!