Question about 2010 Harley Davidson FLHX Street Glide
Changed everything pops through intake thuds out exhaust does not fire.
Hi Richard, 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
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...
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Posted on Jan 02, 2017
SOURCE: Stage 1 Low rpm backfire
If you are running straight pipes they might not give you the right back pressure. This can be reolved by either going back to riginal pipes or instaling a bolt into the pipes about 5 inches in to make back pressure. Another thing? Did you have the bike's electronic ignition reset after you messed with it?
Posted on Jun 21, 2009
SOURCE: i have a new 2010
Any change or modification to any of your vehicles systems can effect your bikes factory warranty! Removing the baffles from the existing mufflers is possible with the proper tools but I think that the internal catalytic converters will prevent this. Changing the entire exhaust or just the mufflers should require the addition of a electronic "fueler" to ensure optimum operation as your bike is delivered to the showroom from H-D running lean thanks to the EPA. For the DIYer I suggest looking at www.vanceandhines.com for exhaust options and accessories.
Posted on Oct 21, 2010
SOURCE: 2003 xl1200C - backfire through
This is a timing issue and has nothing to do with the fuel system that you have. You dont say how many miles are on it. Run a cylinder leak down test on it to see if the valves are seating correctly and the mechanical timing is right.
Posted on Mar 29, 2011
SOURCE: bike runs but back fires
You didn't say what year or model bike it is but I would guess, and that's all this is, that the rear cylinder is running lean for some reason. You may have an intake vacuum leak sucking air into the rear cylinder. That's my best guess.
Posted on Jun 02, 2011
Testimonial: "thanks that gives me one more thing to eliminate.appreciate it"
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