Question about 1979 Honda CX 500 A

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My 79 honda500 want fire i know the coils are and plugs and plug wires are good what else could it be and it hasnt jumptime either

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Have you checked the spark plug caps, if they read above or below 5000 ohms replace them. If they are good then the news is bad. You could have a bad cdi box but more likely with this model , you have bad pulsar pick ups, which unfortunately are part of the alternator assembly. These can be checked without removing the engine by taking readings from the plug going to the cdi box. ac generator disconnect the stator wires at their connections. X10omega
white-blue 77-95 ohms
green-white 387-473 ohms
orange-green 95-116 ohms
light blue-green 95-116 ohms
orange/red-green 81-99 ohms
light blue/red-green 81-99 ohms

advance pulsar

orange/white-green 185-225 ohms
light blue/white-green 185-225 ohms

Posted on Jun 05, 2010

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I have a kohler courage 26 hp pro v twin its not firing on left side swap coils around and it fires on the right fine so both coils are good checked wiring and push rod they re fine any help please


Since you know the coils are good, there is only a few possibilities. The grounding wire must be causing a short to ground. Remove the ground wire from the coil. Check your spark plugs, are you swapping these too? The gap on the coil, this is a long shot, but if it is too far away, it will not fire. Are looking at the spark form the plugs? By firing you mean running, or spark. If you mean by running, check the compression. You may have a stuck valve, usually the exhaust.

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Have 79 gs750E got fire and fuel will not start? Was running than acted like it balged down. Got it back. Now no start


CHECK THE POWER TO THE COIL, AND FROM THE COIL TO THE SPARK PLUG; TAKE ONE OUT LAY IT ON THE BLOCK CONNECTED TO THE WIRE, NOW CRANK THE ENGINE AND LOOK FOR A SPARK. NO SPARK NO POWER. CHANGE THE COIL.

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I am having trouble fiquiring out which wire goes to which plug. The wires are different lengths and the correct wire length has to go specifically with the correct plug. I have the firing order dia


The firing order is 1-2-3-4-5-6
Cyl #1 is front left when looking at engine front to back
left coil pack connects to cyls. 5-2
center coil pack connects to cyls. 3-6
right coil pack connects to cyls. 4-1
It doesn't matter which connector on the coil you use just that the cylinder is connected to the proper coil pack (the coil fires both plugs at the same time, twice per each full 4 stroke cycle)
1998 Chevrolet Lumina
3.1 liter V-6 VIN "M" 94760154.gif

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No spark to rear cylinders runs good and then runs on one cylinder 1986 honda shadow 1100


try switching the position of the two coils, the plug wires will unscrew off of the coils and that way you dont have to pull the spark plug wires too,(be sure and change the 2 wire couplers too) if your front cylinder stops firing you know its the coil, if the back cylinder still doesn't fire then your coil is good and you either have a bad #2 spark unit or a bad crank pulse generator.

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79 harley ironhead 1000cc xlh no spark from coil coil is good and im geting power to both sides of coil


It sounds like your sensor in the timer cavity on the right side of the engine is bad. Disconnect the blue wire from the coil. Take a spark plug out of the engine, put it back in the spark plug wire, and lay it on the head. Turn the switch on and momentarily touch the blue wire to the coil. When you take the wire off of the coil, you should see a spark at the plug. The purpose of the sensor in the timer cavity is to stop the flow of current in the coil and initiate a spark.

Good Luck
STeve

Sep 21, 2010 | 1979 Harley Davidson XLH 1000 Sportster

2 Answers

1984 dodge van has power to the coil but not from the distributer, and it doesnt start. van ran fine until the positive post came off while driving down the road, it just died and hasnt fired back up...


Does the coil produce voltage? I know it has power to it, but is it throwing voltage? if so check the coil wire at the distributor. if power is reaching the distributor but not throwing spark from any plug wires, your problem is a bad rotor and or cap. Or bad wires.

Jun 10, 2010 | 1984 Dodge Pickup 4WD

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NOT GETTING FIRE TO THE SPARK PLUGS


Hello Momtexas1:

>>Remove the Spark Plugs and Wrap the Threaded Section of the Plug with Wire, then Attach the Other End of the Wire to the Engine Block.
>>**First Make Sure the Plastic End that Snaps to the Plug is Allowing Current to the Plug. Use a Test Light or Multimeter and Check for Fire Behind this Connector (through the Large Rubber like Coil Lead to Plug) for Fire to the Plug whenever there is No Fire to the Plug.**
>>Once you are Sure the Coil Lead and Ends to the Plug are Not the Reason for No Fire to the Plug, then with the Plug Still Wired to the Engine and the Coil Lead Attached to the Plug; Remove the Coil Shut Off Wire at the Shut Off Switch.
>>Check for Fire. If No Fire, then Remove the Cut Off Wire from the Coil (removal of the blower housing required) and Check for Fire.
>>If the Spark Plugs are Firing with the Plugs Out and Properly Grounded to the Engine, then Replace the Plugs and Start the Engine.
>>Using an Insulated Plug Wire Puller, Pull the Plug Wire from 1 Cylinder. If the Engine Continuse to Run, then Replace the Plug Wire and Disconnect the Other Plug Wire. If the Engine Quits, then Replace the Other Cylinders Coil.
Send me the Model and Type or Spec Numbers Off the Engine and the Mower Model Numbers, Please. With these I can Locate the Proper Manual and Better Assist you. The Engine Model Numbers May be Stamped Into the Blower Housing (metal engine cover) Above the Spark Plug. The Mower Model Numbers are Usually Located Under the Seat on a Sticker on the Body of the Mower.
>>Thanks.

Respectfully

John

Apr 13, 2009 | Craftsman 42 in. Deck 19.5hp Lawn Tractor

1 Answer

I have a 97 plymouth voyager van that dies out while going down the road we have replaced that converter, plugs wires cap rotar and it is now saying multi mis fires is it a bad o2 sensor


well you might have"bad ign wires" or bad ign coil!!!!O2 sensor wouldn't do that usually miss fires is wire ,coil, broken or crack porcelain on spark plug usually done on installing them!!!!!! I know the three spark plugs closest to fire wall are not easy to get at and some time spark plugs get cracked and over looked good luck

Dec 22, 2008 | 1997 Plymouth Voyager

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