I am working on a friends 1999 Land Rover Discovery. His original complaint was of an engine miss and a coolant leak. Checked out the cooling system and found that the driver's side cylinder head gasket had an external leak. Checked and confirmed no coolant getting into cylinders by removing spark plugs and cranking engine. When I had the plugs out I noticed that cyl. #5 (3rd back on passenger side) was fouled. Removed cylinder heads to fix leaking head gasket. Installed new spark plugs and plug wires (ohm tested wires and found tested at a wide range 5.6k-36.1k ohms, 1 tested open) when reassembling. Started and ran engine after repairs and found that engine still had miss. does anyone have any ideas or suggestions as to my next check? Thank you.
Observe the engine running in the dark to see if there are any spark jumps from the wires or coil, you may have a carbon track.....
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Got it fixed. Silly mistake due to poor quality wiring diagram for spark plug wires on ignition coil. Had wires crossed. Routed correctly and ran like a champ. Thanks
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