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How do you tell a good spark from a bad spark when testing the ignition coil wire to see if there is spark?
There is actually a tool called a spark gap tester that you can set the correct gap and see if it will jump the ap. Also there is another tool that is a light that you put in line with the coil wire and see how bright the light is. Without either of those tools, you will need to use a screwdriver and your judgment The spark is supposed to be 30,000 or more volts(I am not kidding), so it will be a good healthy spark that should be able to jump an 8th of an inch or more. If it is a puny little spark that looks more like a static electricity discharge, it is too weak. If you touch it, it should light you up really good. It wont hurt you if you do, because even though it is tens of thousands of volts, it is at such a low amperage, that it doesn't have any punch. You will just know you have grabbed something that you shouldn't have. I tell you this because I know of guys that have used that method to tell how stron the spark is. Anyway, use a screwdriver against a ground, and see how far the spark jumps.
What else can I help you with?
What color is the spark if the ignition coil is good?
The spark is always blue. If your coil is bad your engine will misfire.
How do you test the ignition coil on your 1994 Geo Metro?
Disconnect the distributor cap end of the coil wire and attach to an ignition tester. Attach the ignition tester to a good ground, away from any fuel lines. A good spark tester can be made from an old spark plug gapped to 0.200". Crank the engine and observe the tester for spark. If a crisp blue spark is noticed, the ignition coil is working properly. If a pale yellow spark, or no spark, is noticed, the coil is more than likely bad.
1989 Mazda will not start it is getting fuel and has a good spark from the coil to the distributor cap but has a week spark at the plugs Have replaced ignition coil distributor pickup coil plug wires?
try to get a new ignition rotor
What could cause a 97 z28 to have no spark had coil and ignition control module tested and are good?
is there spark through the wires to the plugs?
Your mx-6 will not start has no spark out of coil but tests good?
TRY IGNITION CONTROL MODUEL. THAT WOULD BE A GOOD GUESS.
94 Honda civic wont stay running fuses good has spark new ignition switch new ignition module new ignition coil?
Check Gas pump and relays
Why is there no spark on a 1994 Mazda Protege if the engine cranks and the ignition coil is in good working condition?
It could be the ICM or the pickup module.
After changing the ignition module on your probe gt still have no spark?
Why start with the module? The coil is is a good place to start. Make sure of course you have voltage at the coil, if not trace it back.
F250 1989 no spark all new plugs new coil coil wire good what can it be?
I would look first to the rotor, and then maybe at the module check the ignition module
1989 Jeep Cherokee 4L won't start but will try to turn over and it has no spark also has a good ignition coil what could it be?
it could be the coil pick up in your distributor
How to get spark on opel corsa?
To get a spark on an Opel Corsa, first ensure that the ignition system is functioning correctly. Check the spark plugs for wear and replace them if necessary, as well as inspect the ignition coil and ignition leads for any damage. Additionally, verify that the battery is charged and the fuses related to the ignition system are intact. If all components are in good condition, the engine should produce a spark when the ignition is turned on.
One ignition Coil does not spark on 2002 Mitsubishi lancer?
I had similar problem...Ensure that when you replace the Ignition Coil, you also replace the spark plug (might as well do all 4) and the wires. This will prevent further Coil problems. The Coil could blow the plug or wires and when you replace the coil, the plug /wires will blow out the coil again. Also get a full diagnostic...specifically check to ensure the Head Gasket Cover is still good.
