Question about 2003 KTM 625 SXC

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No spark ,coil ,wire ,and plug all test good - 2003 KTM 625 SXC

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Common problem to a lot of bikes , Test all earth wires first and make sure all connections and contacts are ok If you do not have a good earth , you will not have a spark . Check all connections and make sure they are clean and in good contact with each others . The last thing could be the CDI unit which command the power to the coil/contact. best of luck and let me know how you go .

Posted on Jan 01, 2011

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Posted on Jan 02, 2017

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1 Answer

No spark from coil to distrubuter


Disconnect the ignition coil output wire at the distributor cap.
Connect a spark plug to the end of the ignition coil output wire which you just disconnected.
Connect a ground wire to the threaded portion of the spark plug.
Disconnect the ignition coil ground wire from the negative terminal on the coil (Green Wire).
Connect one end of a ground wire to the ignition coil negative terminal.
Turn the ignition switch to the ON position.
Tap the other end of the ignition coil ground wire jumper on an good grounding point (for example the battery negative terminal) and look for sparks at the spark plug that correspond to the frequency of your tapping of the ground wire.
If you have a good spark at the spark plug, the ignition coil is good.
If you don't get a good spark, check for approximately 12 VDC from the coil positive terminal (black wire) to ground with the ignition switch in the ON position. You should also get approximately 12 VDC from the coil negative terminal (Green wire) to ground
Ignition Coil Resistance Check

In addition to the test above, you may elect to perform an ignition coil resistance check as confirmation of the coil's condition.

Check the ignition coil primary coil resistance by connecting an ohmmeter between the positive (Black wire) and negative (Green wire) terminals on the coil. The resistance should be 0.4 to 0.6 ohms.
Check the ignition coil secondary coil resistance by connecting an ohmmeter between the coil output terminal and the ignition coil negative terminal. The resistance should be 5000 to 7200 ohms.

You may have a bad coil or bad ground or wire connection

Jan 23, 2017 | Cars & Trucks

1 Answer

Getting no fire to the spark plug


What year is it???

A simple coil test is: Take the plugs out of the cylinder heads and lay them back on it so that they have a good ground. Then watch the spark plugs closely when you turn the ignition switch off. You should see a single spark on each plug. This tell you that the coil is getting fire and that it is good and your problem lies elsewhere.

Otherwise,
Test the primary coil resistance on your coil. Disconnect all the wires going to the small terminals (primary) on your coil. Using a good ohmmeter on Rx1 setting, test the resistance between the two small terminals. You should read somewhere between 2 and 3 ohms. If you read more, the coil is bad. Before you do this test short out both leads of the ohmmeter and if the reading is not zero you will need to write down or otherwise remember the number and subtract it from the reading you get from the primary circuit test or you will have an incorrect resistance reading for the primary wires because you will also be reading the ohmmeter internal resistance and/or the wire and lead resistance added to the primary wiring resistance.

You can also test the coil by leaving the "hot" wire on the coil and replacing the other side (ground side) with a short piece of wire. Turn the ignition on and temporarily ground the short piece of wire you put on the "out" (ground) side. When you take the wire away from the ground, (which will collapse the primary current into the secondary) you should see a spark at the plugs if it is a wasted spark system or at one of the plugs if it is not a wasted spark system. If you have current to both sides of the primary of a two part coil both plugs should get a spark whether wasted spark system or not as you are energizing both sides of the primary and collapsing both into both secondaries at the same time when you remove the ground wire from the cylinder head ground.

Sep 14, 2014 | Harley Davidson FLHTCUI Electra Glide...

2 Answers

Jeep 3.7 cylenders 2 & 4 not firing


3.7 V6, mileage?

most likely the HV wires bad.

then bad coil pack.

did you check spark directly at the coil pack?

i use 2 known good HV wires to do that and 2 good test spark plugs.

both plugs grounded to engine (shell)

that is how you test any wasted spark coil pack. 3 coil pack.

if that fails the FSM shows, unplugging it and check the coil resistances. if wrong the pack is bad,

keep in mind the res. can read ok and coil be bad ,due to internal insulation break down (internal shorts)

if thats ok. the resistance , make sure the wires are not (primary)

to the coil (the low voltage connnector)

if that is ok, its mostly likely a bad coil, (pray not bad PCM)

if tool-less? start with cheap parts , work to expensive. (guessing)





now wasted spark 101.

if one line opens , both spark plugs die. no spark

the wasted spark is wired in SERIES. ( like Christmas lights)

the magic cuts cost of 6 coil\'s.

so if the HV wires are say, cheap , carbon wire and open

you lose, both spark plugs. use MAG wire and end this issues.

get some nice NGK mag wire or Bosch Mag wires.

you can see i hate carbon wire. for good causes.

(carbon string wire)

mag wires is real wire that is coil spun and is inductive. it

has the correct impedance but is not a resistor its and inductor.

and lasts the longest , and worth every penny.

Mar 29, 2014 | 2006 Jeep Liberty

1 Answer

Bike breaks up at 2500-3500 rpms


Is it good above this rpm range or not.

Check for trouble codes.
2001 TOURING Diagnostic Trouble Codes (DTC) and Fault Conditions
DTC NO. FAULT CONDITION
12 MAP sensor
16 Battery voltage
24 Front ignition coil
25 Rear ignition coil
35 Tachometer
41 Crank sensor
44 Bank angle sensor (within TSM/TSSM)
detects possible theft attempt
52 RAM failure
53 ROM failure
54 EPROM failure
55 Ignition module failure

Battery condition and connections may cause misfires. Inspect for corrosion at battery terminals, main circuit breakers, ignition fuse terminals (GY and R/BK), right handlebar connector [22] and coil connector.

Fuel system problems may cause misfires.

Spark Plugs OFTEN cause misfires, even plugs that look good. If carbon tracking is evident, replace them.

Spark Plug Wires may cause misfires - Front/rear 20 in. 5,000-11,666 ohms. Wires must be clean and tight. Excessive wire resistance or faulty connections can cause coil damage. If carbon tracking is evident, replace the ignition coil and inspect the spark plug wires. Spark plug wire connectors can corrode and should always be coated with dielectric grease to prevent this. If there is any corrosion replace the corroded parts.

Coils may break down and cause misfires but not usually at a given rpm range only. Coil testing can be performed by substituting a known good coil for one causing the no spark condition. The coil
does not require full installation to be functional. Verify a possibly
faulty coil by performing a resistance test. Test the primary coil resistance on your coil. Disconnect all the wires going to the small terminals (primary) on your coil. Using a good ohmmeter on Rx1 setting, test the resistance between the two small terminals. You should read somewhere between 2 and 3 ohms. If you read more, the coil is bad. Before you do this test short out both leads of the ohmmeter and if the reading is not zero you will need to write down or otherwise remember the number and subtract it from the reading you get from the primary circuit test or you will have an incorrect resistance reading for the primary wires because you will also be reading the ohmmeter internal resistance and/or the wire and lead resistance added to the primary wiring resistance.

You can also test the coil by leaving the "hot" wire on the coil and replacing the other side (ground side) with a short piece of wire. Turn the ignition on and temporarily ground the short piece of wire you put on the "out" (ground) side. When you take the wire away from the ground, (which will collapse the primary current into the secondary) you should see a spark at the plugs if it is a wasted spark system or at one of the plugs if it is not a wasted spark system. If you have current to both sides of the primary of a two part coil both plugs should get a spark whether wasted spark system or not as you are energizing both sides of the primary and collapsing both into both secondaries at the same time when you remove the ground wire from the cylinder head ground.

Take the plugs out of the cylinder heads and lay them back on it so that they have a good ground. Then watch the spark plugs closely when you turn the ignition switch off. You should see a single spark on each plug. This tell you that the coil is getting fire and that it is good and your problem lies elsewhere. You get a spark on both plugs because it is a wasted spark system that fires both plugs simultaneously, one on power stroke and the other on exhaust stroke. This will not work on 2006 and later EFI as there will be no spark with both plugs removed.

Manifold leak Spray water around induction module seals with
engine idling. If RPM changes, change seals.

Improper fuel system pressure may contribute to one of the following conditions: 1.Cranks, but won't run. 2. Cuts out (may feel like ignition problem). 3. Hesitation, loss of power or poor fuel economy. Fuel pressure must be a steady running pressure of 55 to 62 psi (380 to 425 kPa).

Plugged, dirty air cleaner may cause rich misfire.
Plugged/dirty fuel filter may cause lean misfire.





Jun 03, 2012 | 2001 Harley Davidson FLHRCI Road King...

1 Answer

91 chevy 4.3, put on new coil and icmodule but still no spark, what do i need to check


Hi there:

Refer to the wiring diagram, click here. First of all, you should have battery voltage at the pink wire to the coil with key on start or run. The pink wire coming from the ignition switch, not the pink wire from coil to distributor, although you may have voltage there as well. Second, the white wire for the tach you should be checking with a 12 volt test light while cranking. That should flicker if the primary circuit is ok.Quite possibly the other white wire may flicker also, according to the diagram.

Anyhow, how are you checking for spark and are you checking right at the coil? If so, swap a small spark plug wire for the coil wire and check again for spark at the end of the wire.

Make a test plug. You can make a test plug with a new spark plug and some wire, a mini hose clamp and an alligator clip. First open the spark plug gap to around 0.075" and strip both ends of a 16 gauge wire about 4 foot in length. Attach the mini hose clamp around the threads of the spark plug cause that is a ground and secure it with the mini hose clamp with the bare wire end in between to make a good connection. Next, take the other end of wire and secure to an alligator clip.

Now, you have a test plug. Remove any spark plug boot you want and insert your test plug onto the spark plug wire end you just pulled off and ground the alligator clip. Lay the spark plug in some shade somewhere under that hood and then crank the engine and look for spark. It should crackle with sound and should be blue but red is ok, orange is a little weak. If it can jump that 0.075" gap you should have no problem igniting an engine.
You can also use that to check coils on some vehicles.

Hope this helps.

Mar 26, 2012 | Chevrolet Cars & Trucks

1 Answer

I changed the magneto on my Honda GX160 QX2 5.5hp. small engine and I still have no spark. Any suggestions on what to check ?


There could be an issue with the oil sending unit, spark plug boot or faulty on/off switch. Easy tests. Always use a new plug for testing. Unplug the oil sending unit wire and retest for spark. If spark may need to change the oil or low oil. If still no spark, leave the sending unit wire unplugged and remove the boot from the plug wire. Insert a short piece of paper clip wire into the end of the plug wire and hold near metal of the engine for test. If spark, replace boot. If still no spark, unplug wire from on/off switch and retest. If still no spark suspect faulty coil ~ redo all tests using old coil. If still no joy return new coil for exchange. I use a growler to test coils(growler used for testing armature for short, place one leg of coil on each pad of growler and activate growler for short burst). Good luck.

Aug 10, 2011 | Electrical Supplies

1 Answer

Have a honda 11 horse on a north star power washer that has no spark,yes the switch is on.


Cause of no spark can be determined by process of elimination. Good to have a new sparkplug on hand to eliminate plug as fault. So start by replacing plug with new or test plug on mower /edger etc. for spark. If plug ok, then temporarily remove the wire connected to oil alert system (oil alert will ground coil if oil low or dirty). With oil alert unpluged, and no spark suspect sparkplug boot or coil. The sparkplug boot threads on to the spartplug wire and is what actually fits-on to the spark plug. You can test the coil by removing the boot and inserting piece of paperclip wire, or small screw into end of the coil wire and hold close to engine ground while pulling rope. If still no spark suspect coil. If spark, replace the boot. Good luck with repair.

Jul 04, 2011 | Northstar Garden

1 Answer

I have no spark at the plug on my k301T.I do not know if my coil is good or not.Is their a way to test the coil?


First be sure you have a new/ known good spark plug. Spark testers are much more reliable if you have one of those.
To test the coil remove the ground wire from the coil. This would be the only wire that plugs into the module. Then reassemble the starter and check for spark again. If there is spark then the module is good and you have a switch or wiring problem. If there is still no spark then the module is bad and needs to be replaced.
Dont forget to reattatch the ground wire or it will be difficult to kill the motor once you get it started.

Dec 28, 2009 | Garden

1 Answer

How to check and fix a cylinder #1 firing problem. Cylinder, plug, or wiring?


You can test each spark plug, but disconnecting the wire as the engine is running. If it runs rougher, then that plug was good. If there's no change, then that plug may be bad. If it runs rougher, it could also mean the wire is bad.


To test the ignition coil (you may have one coil for each spark plug, or one for every two plugs, this part I am unsure of with your model) remove the wire from the plug and then remove the spark plug, then put the plug into the wire (DO THIS WITH THE CAR OFF). Start the car and while using INSULATED PLIERS touch the plug tip to a good ground spot such as the frame even the engine itself, but not to the battery. If there's a spark or crackling sound, then that coil is good.

You can test each wire by hooking it up to a voltmeter and setting the resistance to 20,000 OHM.
The reading will vary based on the length of wire. 12inch wire may register 6-7 while a 30inch wire may register 8-9. If it registers below 6 regardless of length, then the wire should be replaced.

Nov 10, 2009 | Hyundai Motor 1998 Accent

1 Answer

Not getting spark


Testing the coil packs.

1. Get an INSULATED wire and hook it to a ground on the car.
2. Get some one to help you
3. pull a spark plug wire off the coil
4. hold grounded wire close to, but not touching, the part where the spark plug wire connects
5. keep hands away from coil and have your helper turn the engine over ( start car and turn off)
6. if there was a spark between the wire and the coil pack it is good. if not, the coil pack needs replaced
7. replace the spark plug wire
8. test the rest

Apr 22, 2009 | 2003 Mitsubishi Galant

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