Which is more reliable coil pack or distributor?
Generally speaking, coil packs are much more reliable than distributors, because there are no moving parts and because they fire much less often than a distributor. Coil packs usually create a better spark, which in turn produces better combustion and horsepower in a car’s engine.
How does the crank signal work on an ignition coil?
The engine starts to crank, inducing the crankshaft position sensor to start producing its crank signal. The crank signal upon being received by the PCM along with other necessary sensor information, starts to do its little song and dance and sends back a Triggering Signal to each ignition coil.
Where does the voltage from the coil pack go?
When the electronic control module (the car computer) sends the signal to the ignition control, the voltage is released from the coil pack through the spark plug cables to the spark plug.
How to tell if you have a faulty coil pack?
You need to use ohm meter to test the coil pack for continuity. Make sure you have the approximate ohm values for the coil pack. To find this information, research your car’s engine on the Internet or purchase a Chilton’s or Haynes manual to find out what the mega ohms reading on the coil pack should be. Coil Packs vs. Distributors
What is the crank sensor signal on an ICM?
The crank sensor signal is an On/Off type of signal that can be measured with a multimeter or an LED Light. The crank sensor signal is also called the ‘triggering signal’ in this article. As soon as the ICM gets the crank sensor signal, it starts activating the ignition coils sitting atop of it.
When does the Ignition Control Module ( ICM ) create this switching signal?
Once the engine starts and/or above 400 RPM’s (anything above this and the computer considers the engine as having started), the ECM takes over spark Timing and the activation of the ignition coils (thru’ the ignition control module of course). When does the ignition control module (ICM) create this switching signal?
What do you call two crank CKP sensors?
In other words, the assembly is two crank sensors in one and in this article I’ll also show you how to test it. One CKP sensor is called the 3X CKP Sensor and the signal it creates is called the Sync 3X CKP Signal and the other one is called the 18X CKP and its signal the Crank 18X CKP Signal.
Where are ignition coil packs on GM 3.8L?
If you do need to test just the ignition coil packs sitting on top of the ignition control module (ICM), here’s the article for you: How To Test The GM 3.8L V6 Ignition Coil Packs. For a list of all of the 3.8L articles in this site, check out the index: GM 3.8L Index Of Articles.