Question about 2002 Honda VT 750 CD Shadow A.C.E. Deluxe

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Stop back firing, throttling down all the way causes backfire

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Most of the time the timings been moved or the air and fuel is not set right, check your timing first.

Posted on Sep 10, 2010

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1 Answer

My bike back fires bad the fuel pump and two of the injectors have been changed. What could be causing this problem


timing off
valves too tight
too lean
TPS bad
chipped valve, bad valve seat, cracked exhaust pipe sucking air in and igniting.
any # of things can cause backfire.

BE VERY SPECIFIC AND AS DETAILED AS YOU CAN ABOUT WHEN AND HOW THE BACKFIRING IS TAKING PLACE!

when is it backfiring? accel? decel? constant throttle position?
is there ever a point when it is not backfiring?

Jun 17, 2015 | 2006 Suzuki Boulevard C50

2 Answers

Huskie rider backfired when shut off and now it is leaking oil out of crank shaft. What caused the back fire and why is it leaking oil now?


My guess is air filter dirty and fuel is not burning properly which causes heavy carbon build up on cylinder head. So when you shut engine off the red hot carbon is igniting fuel in combustion chamber like an explosion. That is what blew out your crank shaft seal.

Jul 13, 2014 | Mtd Garden

1 Answer

BACK FIRING THROUGH THROTTLE BOY


May be valve adjustment? lean? Is it rhythmic or random? If its rhythmic find out which cylinder has the problem disconnect each spark plug until the back firing stops.

Jun 02, 2012 | 2006 Mitsubishi L200 2.5

1 Answer

93 1200 evo, rough idle, stalling, back firing while coming to stops (using the bikes motor to slow down). power knocks when starting from a complete stop


Sounds like a combination of things. First, are you using high octane fuel? If not, try a couple of tank fulls of that. You mentioned "Power Knocks" when starting off from a complete stop. This is typical of detonation due to low quality fuel.

As for the backfiring and stalling. The engine should idle at about 1000 RPM or so. If it's idled lower thant this, stalling is a possiblity not to mention poor oil of the bottom end. The backfiring could be caused by an air leak into the exhaust system. The mixture in your exhaust system should be overly rich for combustion when you backing down using the engine. If the system is sucking air in at a joint sometwhere, it leans the mixture into a combustable mixture and it ignites causing the back fire. If you've removed the "anti-tamper plug" giving you access to the idle mixture screw, back it out about a half turn and see if that helps.

Good Luck
Steve

Jul 30, 2010 | Harley Davidson XL 1200 C Sportster Custom...

1 Answer

2002 Isuzu Axiom motor backfiring runs rough put new front O2


common causes for back firing, low fuel pressure, or restricted injectors, breakdown of secondary ignition coil, internal ignition coil arching, or a dead spot in throttle position sensor.

Jul 20, 2010 | 2002 Isuzu Axiom

1 Answer

Yamaha vstar 1100 back fireing


Re-jetting the carbs may be needed.
Imbalance of air/gas ratio will cause backfiring among many other things. :)

Other considerations:
Have the timing and valves set.

After market pipes will also increase the Poping sound when you let off the throttle. (not really backfiring but annoying)
Removing and plugging the AIS system will stop most of this.

Good luck!
Hope this helps.

Jul 18, 2010 | 2006 Yamaha V Star 1100 Classic

1 Answer

I have a 2001 that backfires


YEP A CRACKED DISTRIBUTOR CAP.CAUSE BACK FIRING AND CROSS FIRING PLUG WIRES.BAD PLUG WIRES WILL CAUSE BACKFIRING.WRONG HEAT RANGE PLUGS WILL ALSO CAUSE BACK FIRING.

Nov 10, 2009 | Dodge Ram 1500 Cars & Trucks

2 Answers

07 kawasaki kx250f backfires


Hey i have several solutions for you.
The first is have you checked valvue clearence lately, because if the valvue clearence is either to high or to low then it could cause it to back fire. The next solution is repacking your silencer. The next solution is there is two main gaskets in most dirtbikes, one, which is located where the pipe mets the motor. Also the other gasket it where the mid pipe meets the head pipe. The bike fire is usually being caused by extra air. By the way checkin valvue clearence is extremley easy it may sound hard but I do after every ride.

Jun 08, 2009 | 2006 kawasaki KX 250 F

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