Hello! good night, at this moment i will made an article about How To Test The Ignition Coils On A BMW 328
In 328 3 series vehicles, BMW modified the usual use of spark plug wires to individual coil packs which are embedded in the spark plug of each of the cylinders. This is a very effective and optimal way to send spark to the engine. Read to the end and learn how to test the ignition coils on a BMW 328.
Steps to test the ignition coils on a BMW 328
As with any mechanical device, the coils can eventually fail over time, causing jerky running and even wasted power, especially at high RPMs.
Testing the ignition coils on a BMW 328 is possible with the help of a ohmmeterwhich checks the set of ohms that the coil is producing.
- First you need to open the hood. Remove the microfilter cover from the cabin only by turning the three knobs that hold it. Now you need to lift the lid and put it aside. Separate the microfilter from the cabin where it is located and proceed to disconnect the cable assembly from the filter housing. Now remove the four T30 screws that hold the filter housing in place. Put the component in a safe place.
- Pull out the small round-looking plastic plugs on the top of the engine cover that hide the screws that secure the engine cover. Now remove the 10mm nuts that hold the engine cover with the help of a socket set. Then you need to set aside the engine cover.
- You need to unscrew the oil cap from the lower engine cover. Then remove the plastic caps. Remove the 10mm nuts with the help of a socket. And then you should put the lid aside.
- Locate the ignition coils. They are located in a row on the engine and are bolted to the top of the spark plugs. Each of them has a wire harness that is directed towards them. Next you need to remove the two tiny bolts that hold the coils to the spark plugs. You can then push the coil up and also down on the spark plug.
- Inspects the end of the coil precisely where it seats the spark plug. There will be three contacts. The two outside contacts are the first contacts. With the help of an electrical ohmmeter, proceed and test the contacts. Place the ends of the ohmmeter test leads on the respective contacts so you can see how many ohms the coils are putting out. The BMW company says that the acceptable range is 0.4 to 0.8 ohms..
- Change the coil if the ohmmeter reading is not within the acceptable range. It is advisable to replace all the coils at the same time, this is because a failure could be a sign that the others could also be failing.
- Reinstall the coils by sliding them over the spark plug. Then reinstall the two small bolts with the help of a socket. You must also install both the lower and upper engine covers. Reinstall the filter housing, cabin filter, and don’t forget the housing cover.
Items you will need
The articles or tools to be used in this work are the following:
- Screwdriver
- Ohmiometer
- Socket and ratchet wrench set.
In 328 3 series vehicles, BMW modified the usual use of spark plug wires to individual coil packs which are embedded in the spark plug of each of the cylinders. This is a very effective and optimal way to send spark to the engine. Read to the end and learn how to test the ignition coils on a BMW 328.
Steps to test the ignition coils on a BMW 328
As with any mechanical device, the coils can eventually fail over time, causing jerky running and even wasted power, especially at high RPMs.
Testing the ignition coils on a BMW 328 is possible with the help of a ohmmeterwhich checks the set of ohms that the coil is producing.
- First you need to open the hood. Remove the microfilter cover from the cabin only by turning the three knobs that hold it. Now you need to lift the lid and put it aside. Separate the microfilter from the cabin where it is located and proceed to disconnect the cable assembly from the filter housing. Now remove the four T30 screws that hold the filter housing in place. Put the component in a safe place.
- Pull out the small round-looking plastic plugs on the top of the engine cover that hide the screws that secure the engine cover. Now remove the 10mm nuts that hold the engine cover with the help of a socket set. Then you need to set aside the engine cover.
- You need to unscrew the oil cap from the lower engine cover. Then remove the plastic caps. Remove the 10mm nuts with the help of a socket. And then you should put the lid aside.
- Locate the ignition coils. They are located in a row on the engine and are bolted to the top of the spark plugs. Each of them has a wire harness that is directed towards them. Next you need to remove the two tiny bolts that hold the coils to the spark plugs. You can then push the coil up and also down on the spark plug.
- Inspects the end of the coil precisely where it seats the spark plug. There will be three contacts. The two outside contacts are the first contacts. With the help of an electrical ohmmeter, proceed and test the contacts. Place the ends of the ohmmeter test leads on the respective contacts so you can see how many ohms the coils are putting out. The BMW company says that the acceptable range is 0.4 to 0.8 ohms..
- Change the coil if the ohmmeter reading is not within the acceptable range. It is advisable to replace all the coils at the same time, this is because a failure could be a sign that the others could also be failing.
- Reinstall the coils by sliding them over the spark plug. Then reinstall the two small bolts with the help of a socket. You must also install both the lower and upper engine covers. Reinstall the filter housing, cabin filter, and don’t forget the housing cover.
Items you will need
The articles or tools to be used in this work are the following:
- Screwdriver
- Ohmiometer
- Socket and ratchet wrench set.
