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486 PL ENGINE
P
5.
Poor acceleration/
g) Faulty pressure regulator
g) Check & replace
power (continued)
h) Fuel pump faulty
h) Check & replace
i) Phase sensor signal incorrect
i) Check for gap between the phase
sensor & pin on cam shaft & correct it.
j) Valve timing incorrect
j) Check & correct
k) Catalytic converter damaged
k) Check & replace if required
l) Worn out piston rings/seized pistons l) Overhaul & replace affected parts
6.
Knocking
a) Spark plugs defective /
a) Check & replace / Use specified spark
unspecified spark plugs
plug
b) Adulterated fuel
b) Use specified/proper fuel
c) Knock sensor signal incorrect
c) Check & correct
7.
Misfiring
a) Fault with engine management
a) Check for any EMS fault using blink
system. (EMS) signal system or
code method or KTS300. Take
wiring harness
corrective action accordingly.
b) Spark plugs defective / Incorrect
b) Check spark plug gap. Set it or
replace if required.
c) Clogged injectors
c) Check & replace
d) Adulterated fuel
d) Use specified proper fuel
e) Phase sensor signal incorrect
e) Check for gap between the phase
sensor & pin on cam shaft. Set &
correct the gap if required.
f) Valve timing incorrect
f) Check & correct
g) Loose / improper (-ve polarity)
g) Check for proper earth contact on the
earthing junctions connections
vehicle. Refer vehicle & EMS wiring
diagram.
8.
Whitish / bluish
a) Clogged air filter
a) Replace
smoke
b) Adulterated fuel
b) Use specified / proper fuel
c) Worn out piston rings / seized pistons c) Overhaul & replace affected parts
d) Valve guide seal leaking
d) Check & replace
9.
High Fuel
a) Low battery voltage
a) Recharge the battery
Consumption
b) Spark plugs defective / Incorrect
b) Check & replace
c) Clogged injectors
c) Check & replace
d) Adulterated fuel
d) Use specified proper fuel
e) Intake manifold leakage
e) Check & rectify
f) Faculty fuel pressure regulator
f) Check & replace
g) Incorrect phase sensor gap
g) Check & set correct gap
h) Catalytic converter damaged
h) Check & replace
i) Valve timing incorrect
i) Check & rectify
j) Worn out piston rings & Seized
j) Overhaul & replace affected parts
pistons
Sr. Problem Observed
Probable Cause
Action to be taken
no.