Want this question answered?
A coil pack can be checked for continuity and resistance with an ohm meter. But for heat or load failure the only way to check a coil pack is to replace it.
what is the max resistance on a 4.7 grand jeep cherokee coil pack
Check the ignition control module (autozone) and check coil resistance. After that not sure I have same problem with new icm and new coil.
Coil?Computer?
Coil packs can not be checked for heat or load related issues. They can be checked for proper resistance with an ohm meter.
Yes. This testing procedure is valid for most automotive coils. Using an ohmmeter, check the resistance between the side terminals of the coil. Do this with all of the wires to the coil disconnected. You should see 0.75 to 0.81 ohm of resistance. Then check the resistance between either side terminal and the center high tension terminal. The reading should be 10,000 to 11,000 ohms. Any significant deviation from these numbers would indicate that the coil is defective.
First, see if the each coil is getting the required voltage from the ignition switch (probably 12V). If they are, you can check the resistance of the coil with a simple volt meter. Should read minimal resistance. If the meter reads OL then the coil windings are open (defective/bad).
The voltage (or 'potential') coil has the higher resistance, because it is connected in parallel with the load.
A engine coil has a high internal resistance, the needing of a suplementar resistance may be advised to you by a car electrician, who works with such brand and model of your car.
You can check the ignition module (coil) with a digital volt/ohm meter for a start. Check the primary and secondary circuits resistance and go from there. You can also check the spark plug wires resistance with the same meter.
It is located internally inside the Distributor
Distributor pickup coil resistance 140-180 ohms.