If the there is lack of power, excessive oil
consumption or poor fuel economy, measure the compression
pressure. |
1. |
Warm up and stop engine
Allow the engine to warm up to normal
operating temperature. |
2. |
Remove ignition coils. (Refer to Ignition
system in EE Group). |
3. |
Remove spark plugs.
Using a 16mm plug wrench, remove the 6 spark
plugs. |
4. |
Check cylinder compression
pressure
(1) |
Insert a compression gauge into the
spark plug hole.

|
(2) |
While cranking the engine, measure the
compression pressure.
Always use a fully charged battery
to obtain engine speed of 250 rpm or
more. | |
(3) |
Repeat steps (a) through (b) for each
cylinder.
This measurement must be done in
as short a time as
possible. |
Compression pressure
:
1,420kPa (14.5kgf/cm²,
206psi)
Minimum pressure :
1,270kPa (13kgf/cm²,
184psi)
Difference between each cylinder
:
100kPa (1.0kgf/cm², 15psi) or
less
| |
(4) |
If the cylinder compression in 1 or more
cylinders is low, pour a small amount of engine oil into the
cylinder through the spark plug hole and repeat steps (a)
through (b) for cylinders with low compression.
A. |
If adding oil helps the
compression, it is likely that the piston rings and/or
cylinder bore are worn or
damaged. |
B. |
If pressure stays low, a valve may
be sticking or seating is improper, or there may be
leakage past the
gasket. | | |
5. |
Reinstall spark plugs. (Refer to Ignition
system in EE Group). |
6. |
Install ignition coils. (Refer to Ignition
system in EE
Group). | |