Where are the ignition coils on a GM Quad 4?
Where are the ignition coils on a GM Quad 4?
Testing the Quad 4 (2.4L) GM ignition coils can be a bit of a challenge since they’re located under an aluminum cover. Also, in my humble opinion, this ignition system is not the most sturdy or well thought-out way to create and deliver spark to the engine cylinders.
How to test the ignition coil packs ( GM 3.1L )?
If your vehicle does not start and you need to test the ignition control module (ICM) or the Crankshaft Position Sensor on this type of Direct Ignition System click here: Testing The Ignition Module And Crank Sensor (GM 3.1L, 3.4L). To see the complete list of 3.1L and 3.4L test articles, go to the GM 3.1L, 3.4L Index Of Articles.
Where are the ignition coil packs located in a dis?
In this type of Direct Ignition System (DIS), three individual ignition coil packs are mounted right on top of the ignition control module (ICM). As you already know, each coil pack comes with two towers that fire off a spark to two different cylinders simultaneously.
How are the coils on an ignition control module controlled?
That each of the individual coil packs sitting on top of ignition control module are controlled by a Switching Signal. This Switching Signal is created by the ignition control module. That it’s nearly impossible for all three ignition coils to go BAD.
How are ignition coils used in distributorless ignition?
The tests that you’re about to learn are all done without a scan tool. This type of distributorless ignition system uses two ignition coils and each fires spark to two different cylinders simultaneously. One ignition coil feeds spark to cylinders 1 and 4 and the other one feeds cylinders 2 and 3 with spark.
Can you test the Quad 4 ignition system?
In any other GM ignition system, you’re able to isolate most of the major components to test them individually (and while on the car), but not the Quad 4 ignition system. This doesn’t mean that it can’t be tested but it does complicate things a bit. In this article I’m gonna’ present to you my way of doing it… using some pretty simple tools.
Do you need a scan tool to test ignition coils?
A scan tool (Automotive Diagnostics Scanner) is not needed to test the ignition coils. The tests that you’re about to learn are all done without a scan tool. This type of distributorless ignition system uses two ignition coils and each fires spark to two different cylinders simultaneously.
Testing the Quad 4 (2.4L) GM ignition coils can be a bit of a challenge since they’re located under an aluminum cover. Also, in my humble opinion, this ignition system is not the most sturdy or well thought-out way to create and deliver spark to the engine cylinders.
The tests that you’re about to learn are all done without a scan tool. This type of distributorless ignition system uses two ignition coils and each fires spark to two different cylinders simultaneously. One ignition coil feeds spark to cylinders 1 and 4 and the other one feeds cylinders 2 and 3 with spark.
In any other GM ignition system, you’re able to isolate most of the major components to test them individually (and while on the car), but not the Quad 4 ignition system. This doesn’t mean that it can’t be tested but it does complicate things a bit. In this article I’m gonna’ present to you my way of doing it… using some pretty simple tools.
Why do you need to replace all coil packs at once?
So you’ve got a coil-on-plug engine and your check engine light comes on. You scan the codes, take some readings with your multimeter and determine there’s a misfire on cylinder 1 that can be traced to the COP.
