Discovery I (LJ) V8-3.9L (1994)
NOTE:
Other faults, such as fueling faults may give unusual readings.
7.
If any of these readings are abnormal, check the following:
^
Ensure that base time is set to the Workshop Manual specification.
^
Verify condition and gap of spark plugs.
^
Inspect condition of distributor cap and rotor (cracks, dirt, carbon brush condition).
^
Check resistance of spark plug and coil wires. Resistance should be between 98 and 213 ohms per cm (3 and 6.5 K ohms per foot).
NOTE:
A high average KV, somewhere around 35 KV (see Chart 1), is an indication of an open circuit on that cylinder.
8.
Check for variables that raise average KV such as:
^
High resistance plug or coil wire
^
Connector pulled off plug distributor or coil
^
Carbon brush missing or broken in distributor cap
^
Badly worn spark plug
^
Snap throttle opening
^
Lean Mixture
^
Retarded ignition timing