How to diagnose a failed ignition coil on a VW Golf?
How to diagnose a failed ignition coil on an ABA 2.0L Volkswagen VW Golf Cabrio. These cars are infamous for failing ignition coils. This is how you troubleshoot this one. There are other ways such as measuring resistance of the primary and secondary coils, but the problem on this one is usually a cracked body. Loading…
How to test 3 wire cop ignition coils?
This article deals with the testing of the three wire type of Coil-On-Plug ignition coil. To find out how to test the Coil-On-Plug type with two wires in the connector, you can follow this link: How To Test 2-Wire Coil-On-Plug (COP) Ignition Coils.
What are the symptoms of a bad coil on plug ignition?
The most common symptoms of a bad Coil-On-Plug ignition coil or Coil-On-Plug ignition system faults are: Misfire codes that will light up the check engine light (if the vehicle is equipped with OBD II misfire self-diagnostics). A rough idle due to the misfire condition itself.
How many wires does a coil on plug ignition coil have?
The Coil-On-Plug ignition coil has three wires coming out its connector. One of those wires (circuits) is the one that delivers 12 Volts to the coil. Usually, the same fuse or relay feeds all of the Coil-On-Plug ignition coils.
How hot should an ignition coil run on a classic car with a?
If the system has a ballast resistor then check the voltage supply to the coil + terminal with the engine cranking and then with the engine running. It should read 12v on crank and about 9v with the engine running. Hi Mark. Thank you for your quick reply. My readings are backwards ha ha. Has about 9v cranking and 11.8 running.
What causes an ignition coil to overheat?
An ignition coil will get warm in use but it should not burn you or be too hot to touch. If the system has a ballast resistor then check the voltage supply to the coil + terminal with the engine cranking and then with the engine running.
What should the voltage be on an ignition coil?
An ignition coil will get warm in use but it should not burn you or be too hot to touch. If the system has a ballast resistor then check the voltage supply to the coil + terminal with the engine cranking and then with the engine running. It should read 12v on crank and about 9v with the engine running. Hi Mark.
What does it mean when your ignition coil goes bad?
This may mean the ignition coil is not working properly. While this problem can happen with any coil configuration, it is more common with engines that have a single ignition coil. Ignition coils can either fail completely or fail intermittently. This means that you may have a coil that goes bad over time.
Where is the ignition coil located on a car?
Older vehicles have a distributor, ignition coil, and spark plug wires. Most vehicles made after the late 1990s typically have a small ignition coil that sits directly on top of each spark plug, which is known as coil-on-plug (COP) design. Regardless, the functionality is the same. When you start your engine, current flows to the ignition coil.