Summit Wagon AWD L4-1795cc 1.8L SOHC (1994)
Fuel Injector: Component Tests and General Diagnostics
TROUBLESHOOTING HINTS
Hint 1: If the engine is hard to start when hot, verify the fuel pressure is correct and check the injector for leaks.
Hint 2: If the injector does not when the engine that is hard to start is cranked, check the following;
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Faulty power supply circuit to the engine control module, faulty ground circuit.
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Faulty multi port fuel injection relay.
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Faulty crankshaft position sensor, camshaft position sensor.
Hint 3: If there is any cylinder whose idle state remains unchanged when the fuel injection of injectors is cut one after another during idling, make
following checks about such cylinder.
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Injector and harness check
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Spark plug and high tension cable check
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Compression pressure check
Hint 4: If the injector harness and individual part checks have resulted normal but the injector drive time is out of specification, the following
troubles are suspected.
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Poor combustion in the cylinder (faulty spark plug, ignition coil, compression pressure, etc.)
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Loose EGR valve seating
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High engine resistance
HARNESS INSPECTION
Fuel Injector
ACTUATOR INSPECTION
Fuel Injector
CHECKING OPERATION SOUND
Using a stethoscope, listen for an operation sound ("chi-chi-chi") of injectors during idling or during cranking.
