Fuel System - Triumph TR6 PI Operation Manual

PETROL INJECTION FAULT DIAGNOSIS
Primary Checks
Experience has shown that very often faults attributed to
the Petrol Injection System are in fact caused by the engine-
being in poor state of tune. It is therefore essential that
before attempting any fault diagnosis of the P.I. System the
Primary Checks, detailed below, must be carried out first.
I. Check fuel supply is clean and adequate.
2. Ensure the battery is charged and in good condition.
3. Clean, check and set spark plug gaps.
4. Check and adjust valve clearances. 12.25.48.
5. Check compression pressures. 12.25.61.
6. Check ignition timing. 86.35.15.
7. Renew faulty rubber balance pipe connectors linking
the three manifolds, and check the tightness of the
vacuum adaptors.
8. Check and adjust throttle butterflies. 19.20.05.
9. Check manifold depression. 12.49.03.
FUEL SYSTEM
PI
Special Equipment.
I.
Pressure gauge 0 to 120 Ib f/in
2
(0 to 8'4 kg/cm
2 )
2. Ammeter 0 to 10 amps
3. Voltmeter 0 to 20 volts.
4. Pressure test adaptor.
5. 15ft. (4'6 m) of twin cable 28/'012 in. Two nipples
soldered on one end of cable. Cable Connector for
connection in series to pump.
6. Air-flow meter.
7. Vacuum gauge.
8. Metering unit outlet union seal removal and renewal
tools. - see 19.35.14.
SYMPTOM
CAUSE
ACTION
Engine will
not start.
Engine cutting
out.
a.
Inertia cut-out switch has
operated.
b. Blocked fuel filter.
c. Pump inoperative
d, No spray from injectors.
e.
Incorrect or no line pressure.
f
Incorrect injection order.
a.
Slipping drive belt.
b. Incorrect line pressure.
c. Fuel tank breather pipe blocked.
d.
Blocked fuel filter.
Push switch down to complete pump
circuit - 86.65.59
Check fuel filter and renew element ~
19.25.07
Check pump end·float. Check brushes.
Check for gear seizure - 19.45.15.
Remove each Injector In turn and test
- 19.60.02
Check line pressure and adjust pressure
relief valve - 19.65.0 I
Check that the pipes are fitted to the
Injectors in correct order.
Check drive belt tension.
Check line pressure statically and
during road test with pressure gauge
and ammeter. 19.45.01.
Clear or renew pipe.
Renew filter. 19.25.07
Continued
Triumph TR6 Manual. 'all No. 545277 ...... I
19.00.01 P.I.