MARUTI SUZUKI Wagon R, Manual

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Engine General Information and Diagnosis: Bi-Fuel LPG model 1A-42
Engine hesitates –
Momentary lack of
response as accelerator
is depressed. Can occur
at all vehicle speeds.
Usually most severe when
first trying to make
vehicle move, such as
from a stop sign Spark plug faulty or plug gap out of
adjustment “Spark Plug Inspection”: in Section
Petrol and/or LPG fuel pressure out of
specification “Fuel Pressure Check”: LPG in Section 1G
Poor performance of ECT sensor or
MAP sensor “ECT Sensor Inspection”: in Section or “MAP
Sensor Inspection”: in Section
Faulty throttle body assembly “Throttle Body On-Vehicle Inspection”: in
Section
Faulty petrol fuel injector(s) and/or LPG
fuel injector(s) “Fuel Injector Circuit Check”: in Section
Faulty ECM “Inspection of ECM and Its Circuit”: Bi-Fuel
LPG model
Faulty LPG control module “Inspection of LPG Control Module and Its
Circuit”: Bi-Fuel LPG model
Engine overheating Condition “Engine overheating”
Low compression “Compression Check”: in Section
Surge – Engine power
variation under steady
throttle or cruise. Feels
like vehicle speeds up
and down with no change
in accelerator pedal Faulty spark plug (excess carbon
deposits, improper gap, burned
electrodes, etc.) “Spark Plug Inspection”: in Section
Variable petrol and/or LPG fuel pressure “Fuel Pressure Check”: LPG in Section 1G
Kinky or damaged petrol and/or LPG
fuel lines “Fuel Line On-Vehicle Inspection”: LPG in
Section 1G
Faulty fuel pump (clogged fuel filter) “Fuel Pump and Its Circuit Check”: LPG in
Section 1G
Poor performance of MAP sensor “MAP Sensor Inspection”: in Section
Faulty petrol fuel injector(s) and/or LPG
fuel injector(s) “Fuel Injector Circuit Check”: in Section
Faulty ECM “Inspection of ECM and Its Circuit”: Bi-Fuel
LPG model
Faulty LPG control module “Inspection of LPG Control Module and Its
Circuit”: Bi-Fuel LPG model
Faulty throttle body assembly “Throttle Body On-Vehicle Inspection”: in
Section
Condition Possible cause Correction / Reference Item