Not getting a spark out of the coil? - Cars & Trucks

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

Hi Jason, Sounds like you have a coil pack and one of your coils is faulty. To check which coil is faulty just pull a spark plug lead off a spark plug and plug the spark plug lead onto a SPARE spark plug, Now earth it to the CLEAN motor or body (make sure the spark plug is touching metal) Start the motor, it's going to run ROUGHER than usual but you'll see if that spark plug is sparking... If it sparks then that coil is good. Turn the motor off and replace the spark plug lead back on to the original spark plug. Repeat with the next spark plug lead and so on until you start your car and the spark plug doesn't spark, THAT'S YOUR FAULTY COIL...

bad for coil, have them test for continuity

1995 silverado has a distributor, remove the the distributor cap, make sure the distributor spins with the engine. also make sure the ignition rotor is not burned out or have a hole were it makes contact with the cap. also make sure the cap has a good carbon inside to make contact with the rotor, at this time get a screw driver, put it on the end of the wire from the coil to the cap, don't touch the metal part of the screwdriver, it will shock you if good, so put it at 5/16 from any metal on the engine, bracket, alternator , thermostat housing no matter, some one turns the engine over, check to see if the coil produces a spark, if the rotor turns, if ok it should have spark on all the wires, if it has no spark, remove the wire from the ignition coil and check if you have spak at the coil, if you have no spark, try getting a wire lead, connect it from the battery ground on one end, a screw driver on the coil to check for spark, and the other end of the wire with the key on, touch the - negative plug on the coil, that should produce a spark, if not spark yet, make sure you do have power at the coil with key on, if you do and it doesn't produce spark, replace coil. if it does spark but it is weak or yellow in color, replace coil. if coil is fine, replace distributor module,

Broken coil pack................

You say no spark to the coil. does that mean that you have checked the power to the coil & getting none or are you getting no spark from the coil to the distributer cap? If you have no spark that is most likely the problem of not starting but you can always just check your fuel pressure to see.

If your getting spark from the coil and none to the plugs.Then its either the wires or plugs. I'm curious .... what are you using to test for spark at the coil?

COIL PACK IS YOUR PROBLEM HERE

Is it sparking between boots or is it from the boot to the engine? You need to use dielectric grease on the boot on the coil to stop leakage of voltage between coil towers, I can't find the 2006 laser so chose a model similar to that model. With the engine off and you pull the spark plug wires put a little bit of the special grease on your finger and put it on the inside of the boot of the spark plug wire at the coil and at the spark plug. Be sure to not get any on the spark plug metal tip or on the metal on the coil pack. When removing the spark plug wire from the coil and plug be sure to twist it with the engine being cold so that you don’t ruin the spark plug wires. This should stop the leakage, if not then you have a defective coil/ coil pack and need to see if there is a carbon track or a crack in the coil assembly itself, let me know if this helps and get back to me if you need more assistance.
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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