Toyota 2L-T Repair Manual page 44

(f)
I f the cylinder compression in one or more cylinders
is low, pour a small amount of engine oil into the
cylinder through the glow plug hole and repeat steps
(a) through (d) for the cylinder with lowcompression.
I f adding oil helps the compression, chances are
that the piston rings and/or cylinder bore are worn
or damaged.
I f pressure stays low, a valve may be sticking or
seating improperly, or there may be leakage past
the gasket.
REINSTALL GLOW PLUGS
(w/ Intake Pipe)
REINSTALL INTAKE PIPE
REINSTALL AIR CLEANER
RECONNECT INJECTION PUMP (FUEL CUT
SOLENOID) CONNECTOR