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1.05L REVOTORQ ENGINE
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3.4 ENGINE TESTS AND MAINTENANCE :
A. PRELIMINARY INSPECTION :
NOTE
It is always advisable to first use the
diagnostic tool and rectify the electrical
faults, before commencing with mechanical
repairs/ troubleshooting. Refer ENGINE
MANAGEMENT SYSTEM section in this
group for procedure.
General :
Check for leakage of Oil, fuel, and Coolant.
Check for overheating of engine.
Check for unusual smoke.
If there is any fault in the Engine
Management system
(EMS)
then the MIL
indicator in the instrument cluster will come
ON. In such a case connect the diagnostic
tester.
(For procedure refer EMS section).
Before proceeding to carry out actual
reconditioning of engine, it is desirable to
have a preliminary inspection of engine to
ascertain whether an engine reconditioning
is necessary and if so, to what extent.
Most common reasons for which engine
is reconditioned are
1. Loss of power.
2. Excessive engine oil consumption.
3. Extremely low engine oil pressure.
4. Mechanical failures.
B. ENGINE TESTS :
i.
Loss Of Power :
Loss of engine power may be due to
a. EMS is in limp-home mode due to some
critical fault.
b. Clogged air filter / clogged intercooler fins
/loss of charge air pressure / choked
exhaust passage / Particle Oxidation
Catalyst (POC).
c. Loss of engine compression
d. Defective fuel system
e. Clutch slippage
f. Brake binding
g. Turbocharger
a.
EMS is in limp-home mode
If the EMS detects some major fault in the
system it switches to limp-home mode, where it
runs at a reduced torque. Connect the diagnostic
tester and check if any faults are present in the
Engine EMS, if found rectify them.
(For details
refer Engine Management Section)
b.
Clogged Air filter/Loss of Charge Air
Pressure/ Choked Exhaust Silencer /
Particle Oxidation Catalyst (POC).
Loss of power with unusual black smoke
from engine exhaust indicates lack of air or low air
charging pressure to engine cylinders. Clean air
filter & inter cooler fins. Check all joints for air
leakage. If power loss with black smoke is still felt,
check exhaust silencer for choking. Clean and
replace silencer if necessary. Check for kink
formation in exhaust piping.
c.
Checking Engine Compression Pressure
If loss of power is not on account of
defective fuel system, lack of air, choked
exhaust system, clutch slipping and brake
binding, check engine compression as
follows.
Warm up engine preferably by road drive
to get a coolant temperature of about
80ºC.
Stop the engine.
Remove the air filter.
Remove the injector back-leak pipes and
high pressure pipes from rail to injector
.Disconnect rail pressure sensor.
Plug the common rail outlet with suitable
caps.
Remove all injectors.
Fit adapter
(Part no 2871 5890 07 01
)
in
place of one injector.