Inspection

3MZ-FE IGNITION: IGNITION SYSTEM:

INSPECTION

1. INSPECT SPARK PLUG
NOTICE:
- Do not use a wire brush for cleaning.
- Do not attempt to adjust the electrode gap of a used spark plug.

(a) Check the electrode.
(1) Using a megaohmmeter, measure the insulation resistance.
Correct insulation resistance:
10 MOhms or higher
If the resistance is less then the specified value, proceed to step (b).
HINT: If a megaohmmeter is not available, perform the following simple inspection instead.

(b) Alternative inspection method:
(1) Quickly accelerate the engine to 4,000 rpm 5 times.
(2) Remove the spark plug.
(3) Visually check the spark plug.
Result:

(4) Reinstall the spark plug.

(d) Check the spark plug electrode gap.
Maximum electrode gap for used spark plug:
1.3 mm (0.051 in.)
If the gap is greater than the maximum, replace the spark plug.
Correct electrode gap for new spark plug:
1.0 to 1.1 mm (0.039 to 0.043 in.)

(e) Clean the spark plugs.
If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.
Air pressure:
Blow 588 kPa (6 kgf/cm2, 85 psi)
Duration:
20 seconds or less
HINT: If there are traces of oil, remove them with gasoline before using the spark plug cleaner.