Triumph TR6 PI Operation Manual page 172

FUEL INJECTORS
- Spray check
19.60.02
FUEL SYSTEM - PI
Testing without a rig
1. Remove the bolt securing the injector clamp plate to
the manifold and remove the plate.
2. Start the engine and pull number one injector out of
the manifold and observe the emission of fuel. The
check should show a 60° hollow cone spray in regular
pulsations. If there is any sign of dribbling or irregular
cone formation the injector should be disconnected
from its injection pipe - instruction 3, 19.60.0 I and
cleaned by passing dry filtered air through the
injector in the direction of the fuel flow at
a
pressure
of approximately 80 Ibfin
2
(5 ·624 kgfcm
2
)
3. Reconnect the injector to its injection pipe - test
again and if satisfactory refit to the manifold. If
unsatisfactory, renew the injector.
4. Repeat instructions 2 and 3 on number two injector.
5. Refit !he clamp plate and secure with the bolt.
6. Repeat instructions I to 5 on the remaining injectors
and stop the engine.
CAUTION: When checking fuel emission, direct spray into
a glass jar to prevent atomized fuel being sprayed over
the engine.
NOTE: A possible faulty injector may be identified without
the necessity of removing each injector in turn as
described in instruction 1 to 6 by following
instructions 7 to 9.
7. Remove the cleats holding injection pipes together,
and separate them to prevent the transmission of
pulsations from one pipe to another.
8. Start the engine and hold each injector pipe in turn
between the thumb and forefinger. A regular
pulsation should be felt but a weak or missing
pulsation suggests a possible faulty injector. No
pulsation on two consecutive pipes, in the firing
order, indicates that the first injector of the two is
blocked.
9. Stop the engine and remove the suspect injector and
clean as described in instruction 2. Refit or renew the
injector and refit the cleats.
Continued
Triumph TR6 Manual. Part No.
S4S277
Issue I
NT2392
19.60.02 P.I. Sheet 1