How are cylinders 2 and 3 of the ignition module paired?
Towers that feed spark to cylinders #2 and #3 are ‘Paired’. Towers that feed spark to cylinders #1 and #4 are ‘Paired’. NOTE: If you have no spark from any other towers that are not ‘Paired’ (like No Spark from Cyl #1 and #3), then the ignition control module is not at fault and this tutorial won’t help you.
What kind of spark plugs get spark at the same time?
Spark plugs for cylinders #1 and #4 get spark at the exact same time. Spark plugs for cylinders #2 and #3 get spark at the exact same time. These cylinders are referred to as ‘Paired Cylinders’. Each coil pack fires spark to spark plugs on one side of the engine.
How to know if your engine has no spark?
First Confirm Your Engine Has No Spark. 1 Disable the fuel system by removing the fuel pump fuse or relay. 2 Insert a spark plug tester into the plug boot and ground it on a piece of metal on the engine. 3 Finally, Have someone crank the engine and watch for spark.
Why does my 3.0L 4 cyl 4 MerCruiser not start?
3.0L 4 cyl. mercruiser, cranks but won’t start – no spark? Engine ran great last year when put up for winter. Unable to start enging during spring commissioning. battery fully charged, engine turns over, have spark at plugs and coil, have fuel coming in to carb.
Which is the best test for no start, no spark condition?
KOEC test is best used for diagnosing no start, no spark condition. Black=known good ground. KOEO, primary ignition voltage must be present to continue with test. Crank Engine and check for ICM switching at ignition coil while cranking. As ICM switches, primary voltage spikes can be seen. 25k ohms total resistance per wire.
What kind of spark does a crank engine have?
Crank Engine and check for ICM switching at ignition coil while cranking. As ICM switches, primary voltage spikes can be seen. 25k ohms total resistance per wire.
Where does the spark come from in the ignition coil?
This high voltage is required to overcome the greatest KV requirement in the secondary (normally the spark plug gap) this high voltage is transmitted from the coil to the spark plugs through a coil wire, dist cap, rotor and spark plug wires. Component Test Meter can be used to view secondary ignition waveforms.
Why does my car not have a spark?
We did this to make sure the timing belt was not broke. Its like the ignition coil is not collapsing to send the spark energy to the spark plugs.