Check the cylinder compression pressure.
Insert a compression gauge SST(09351-27000, 09351-2A000) into the injector hole.
Fully open the throttle.
While cranking the engine, measure the compression pressure.
Always use a fully charged battery to obtain engine speed of 250rpm or more.
Repeat step 1) though 3) for each cylinder.
This measurement must be done in as short a time as possible.
Compression pressure :
1.4L : 2,059.39kPa (21.0kg/cm², 298.69psi) (220 rpm)
1.6L : 2,157,45kPa (22kg/cm², 312.91psi) (220rpm)
Minimum pressure :
1.4L : 1,765.19kPa (18kg/cm², 256.02psi)
1.6L : 1,863,25kPa (19kg/cm², 270.24psi)
Difference between each cylinder :
294.20kPa (3.0kg/cm², 42.67psi) or less
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 step 1) through 3) for cylinders with low compression.
If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are worn or damaged.
If pressure stays low, a valve may be sticking or seating is improper, or there may be leakage past the gasket.
