Leakage Test; Spray Pattern Test - Toyota 1C Repair Manual

'
Good Faulty
Good
Faulty
Faulty Faulty
y
r
i
y
'
FUEL SYSTEM - Injectio n Nozzle
FU-7
mm
.,,
..
.2.
LEAKAGE TEST
3.
While maintaining pressure at about 10 - 20 kg/cm• (142
- 284 psi. 981 - 1,961 kPa) below opening pressure
(adjust by tester handle), check that there is no dripping
for 10 seconds from the injection hole or around the
retaining nut.
If the nozzle drips within
1 0
seconds, replace or clean and
overhaul the nozzle assembly.
SPRAY PATTERN
TEST
(a)
The injection nozzle should shudder at a certain
pumping speed between
15 - 60
times
(old nozzle)
or 30 -
60
times (new nozzle) per minute.
(b) Check the spray pattern during shuddering.
If the spray pattern is not correct during shuddering, the
nozzle must be replaced or cleaned.