Aviator 2WD V8-4.6L DOHC (2003)
1.
Using data obtained in Step 1,identify each cylinder that has misfire data.
STEP 3: COIL STRESS TEST
NOTE:
The Coil Stress Test should be performed on the coils that were identified in Step 2.
1.
Connect the Vehicle Measurement Module (\,MM) to the vehicle and the IDS.
2.
Remove the engine appearance cover.
3.
Remove the air cleaner outlet tube.
4.
Remove the ignition coil cover bolts and cover.
5.
Remove the identified coil-on-plug from the spark plug. Turn it upside down so it will not spark to ground during the test.
6.
Connect the coil-on-plug clip to the coil-on-plug and connect the other end of the VMM secondary ignition transducer cable to the VMM.
7.
Disconnect the fuel injector electrical connector from the cylinder being tested so raw fuel is not washing the cylinder.
8.
Start the vehicle and the scan oscilloscope. Record the data. Refer to Figure 2 showing the difference between a good coil pattern and defective
coil patterns.
9.
Turn the vehicle off.
10.
Reconnect the fuel injector electrical connector.
11.
Remove the coil-on-plug clip from the coil-on-plug.
12.
If the coil is defective, install a new coil-on-plug assembly.