I have the coil pack off the car with the module still attached. Can I ohm the coil with the module connected ? if you can, I'm getting 11.68,10.78 and 10.55 ohms. I'm getting a code 42 which is why I started this.
I have the coil pack off the car with the module still attached. Can I ohm the coil with the module connected ? if you can, I'm getting 11.68,10.78 and 10.55 ohms. I'm getting a code 42 which is why I started this.
Coils have two sides, a primary and a secondary. Ohming the top only covers the secondarys. The connection to the ignition module has to be disconnected to measure that impedence.
Also: that test isn't conclusive. You can prove a bad coil if it's directly shorted or open. But it's possible to be 'in spec' yet still fail to perform.
If you remove the coil pack from the module the big chain auto parts stores can test both of them for you. I know Autozone does this.
If you decide to have this done it would be a good idea to call your local store ahead of time to make sure they can perform the tests before driving there. Also be careful when pulling the module wire connectors off the coil pack terminals they can and will break off very easily. I use a pair of pliers to grab the wire connector and pull it straight off the terminal without bending them.