Diagnosing Bad Spark Plugs and Coils on a Land Rover LR3 2005-2008

The check engine light comes on your 4.4 LR3, and in checking, you find you’re getting misfire codes.

The most common problem for this is a bad coil or failed spark plug.

Watch Doug, our Land Rover Master Technician, as he gives you tips and pointers on diagnosing a bad spark plug or ignition coil.

This tech tip is demonstrated on an LR3 2005-2008.

Also Applies to: Range Rover Sport Supercharged 2006-2009; Range Rover Sport 2006-2009; Range Rover Sport Supercharged 2010-2013; Range Rover Sport 2010-2013; Range Rover Full Size 4.4 Jag Engine 2006-2009; Range Rover Full Size 4.2 Supercharged Jag Engine 2006-2009.

0:13 Misfires and bad coils or spark plugs
0:38 What happens
0:52 The most common factor
1:02 Tools for the job
1:55 Accessing the coils and plugs
2:06 Accessing relay and fuse box
2:19 Location of relays to pull
2:33 Performing the tests
3:16 Starter motor relay
3:52 Test light use
4:48 Testing the coils
6:01 Indicator on means power
7:07 Green light means grounded
8:06 Coil is good
8:26 Spark plug is cold fouled, replace
9:19 Ordering information

Parts List:
Spark Plug Maintenance Service Kit
https://www.roverparts.com/engine/ign...
Single Spark Plug
https://www.roverparts.com/engine/ign...
Ignition Coil
https://www.roverparts.com/engine/ign...
Ignition Coils, Set Of 8
https://www.roverparts.com/engine/ign...


Please refer any questions or comments to 1-800-533-2210, or go to live chat at https://www.roverparts.com.

For more how-to videos on the LR3 and other Land Rover vehicles visit https://www.roverparts.com/resources/...

#atlanticbritish #lr3 #sparkplug #ignitioncoil