Question about 2000 Harley Davidson XL 1200 C Sportster Custom
Had to extend wiring due to new handle bars, went to start the bike but not enough spark getting to plugs ( back plug has very weak spark whilethe front has none ) could the coil be faulty or is there a wire from the run switch not connected properly that I missed?
Posted by Anonymous on
Hi Anonymous, when checking for spark the CKP needs to measure the compression bump in order to send the correct signal to the ICM/ECM so always check for spark with either a third plug grounded or lift the end of the plug boot 1/2 " off one of spark plugs that are in the head. and the usual suspects are:
1. Fuel tank empty
2. Fuel supply valve turned off.
3. Fouled spark plugs.
4. Engine flooded with gasoline as a result of over use of enrichner.
5. Fuel valve or filter clogged.
6. Vacuum hose to automatic fuel supply valve disconnected, leaking, or pinched.
7. Discharged battery, loose or broken battery connections.
8. Loose wire connection at coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, spark plug cable connections loose,
or cables connected to wrong cylinders.
10. Ignition timing incorrect due to faulty ignition coil, ignition module, or sensors " Manifold Absolute Pressure" "Camshaft Position Sensor" "Crank Position Sensor" "Brake Apply Sensor
11. Engine lubricant to heavy ( winter operation )
12. Sticking or damaged valves or push rod wrong length.
13. Primary cam sproket spline sheared or missing spacer.
14. Security alarm system not disarming.
For a primary suspect please visit the website below: Good luck
Harley Davidson Sportster error codes and how to access them
Posted on May 31, 2015
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
SOURCE: Rear cylinder not firing
The first thing I would do is replace the spark plugs again. You can foul a plug and it will cause you more problems than you can ever imagine. I see you have done all the logical things that I would recommend but I did not see you have replaced the plugs after the 200 miles. You would be surprised at how many times a $2.00 part can cause fits beyond belief.
Posted on Dec 08, 2008
Since you have thrown the entire ignition system at it, let's think about fuel. If you were running out of gas it would act as you described. I would start by removing the float bowl. Be careful not to spill any gas because we want to look at the level. It should be over half full. Check the float movement. You should be able to push it up without resistance. Looking from the bottom remove the phillips screw that retains the float axle and the float and needle valve should fall out. If the needle valve has three sides or if the rubber tip is worn, replace it. The 3 sided valves have a tendancy to stick closed and all dealer stock should be the 4 sided version by now. After you re-install the float, leave the bowl off and follow the small vacuum hose from the petcock to the carb. Pull it off at the carb end. Look to make sure it isn't damaged. **** lightly (sorry) or use a vacuum pump on the hose. With the petcock on and gas in the tank, a healthy stream of fuel should pour from the needle valve. If not, the petcock diapragm is shot. If none of this helps, take it for a ride and when it acts up, crack the fuel cap loose and if it takes off the vent in the cap is malfunctioning.
Posted on Jan 05, 2009
SOURCE: not getting spark all the time
I think the only problem you have is a loose or corroded connection somewhere. Check your module plug connectors for corrosion (green junk). Check wires to coil, kill switch and other connections for loose or frayed wires or connectors.I doubt that you have a bad electrical component since it starts sometimes but it is possible. Let us know what you find.
Posted on Mar 20, 2009
no your totally wrong the backfire is bcause if u juice the throttle there is excess fule in the cylinders witch give it no where to go so it ignights and creates a backfire witch is not necessarly bad.
Posted on Sep 15, 2009
Plugs foul for a couple reasons, engine in poor condition (worn rings - poor compression), wrong oil, wrong plugs, bad riding conditions, cheap fuel, out of tune, carb out of tune.
You are not mixing your fuel with oil are you?
You might need a carb tune up (Id start by adding some injector cleaner to the fuel according to the bottle instructions.
You might put a hotter plug in your engine, one or two range increase.
If you will go to a good auto parts store, they will probably have a chart of assorted plug conditions and their cause. The counter man may be able to make a recommendation to you.
Posted on Oct 18, 2009
Tips for a great answer:
Dec 05, 2013 | 2000 Harley Davidson XL 1200 S Sportster...
Sep 01, 2013 | 1993 Harley Davidson XLH Sportster 883
Jun 17, 2012 | 2005 Harley Davidson XL 1200 C Sportster...
Apr 28, 2012 | Harley Davidson XLH Sportster 883 Hugger...
Oct 23, 2011 | 1979 Harley Davidson XLH 1000 Sportster
Feb 15, 2011 | 2000 Harley Davidson XL 1200 S Sportster...
Aug 23, 2010 | 2005 Harley Davidson XL 1200 C Sportster...
Feb 10, 2009 | 2001 Harley Davidson XLH Sportster 883...
Nov 08, 2008 | Harley Davidson Harley-Davidson Motorcycle...
127 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: