Malfunction areas in Turbocharger/ Supercharger
Due to insufficient boost pressure, insufficient power is felt when vehicle starts or a heavy load is applied.
When sudden accelerating without load, diesel smoke level inspection is normal (diesel engine) Intake system
Malfunction areas in Intake system
When a heavy load is applied and the engine speed is high, there is a shortage of intake air and insufficient power is felt.
Feeling that engine speed has hit its peak, however engine speed does not increase.
When sudden accelerating without load, a lot of black smoke is exhausted in the diesel smoke level inspection (diesel engine)
Malfunction areas in EGR system
Due to excessive EGR volume, insufficient power is felt when vehicle starts or a heavy load is applied.
When sudden accelerating without a load, more black smoke is exhausted in the diesel smoke level inspection (diesel engine)
Malfunction areas in Exhaust system
Due to clogging in exhaust system, there is a shortage of intake air, and insufficient power is felt when a heavy load is applied and there the engine speed is high.
When driving with the throttle valve fully open in 1st or 2nd gear, the maximum speed is lower.
Malfunction areas in Cooling system
After driving for a while with a heavy load applied and engine speed high, insufficient power is felt.
The water temperature indicator indicates high temperature. Knocking is often accompanied.
In the case of diesel engine, even if overheat occurs, insufficient power is not immediately felt. Until when a malfunction in the cylinder head gasket,
piston, etc. occurs, insufficient power is not felt, so it is necessary to pay attention (diesel engine).
Malfunction areas in Fuel system
Due to fuel supply shortage, insufficient power is felt when a heavy load is applied or the engine speed is high.
When driving with the throttle valve fully open in 1st or 2nd gear, the maximum speed is lower.
Engine stall also may occur.
Malfunction areas in Injection timing
If injection timing advances, insufficient power is felt when vehicle starts or a heavy load is applied and diesel knocking sound is loud (diesel engine).
When sudden accelerating without a load, black smoke volume is large in the diesel smoke level inspection (diesel engine)
Malfunction areas in Injection volume
Due to injection volume shortage, insufficient power is felt in the heavy load range, from low speed to high speed (diesel engine).
When sudden accelerating without a load, diesel smoke level inspection is small (diesel engine)
Due to injection volume shortage, insufficient power is felt in the heavy load range, from low speed to high speed (diesel engine).
When sudden accelerating without a load, diesel smoke level inspection is small (diesel engine)
Malfunction areas in Compression pressure
Insufficient power is felt in all ranges from the starting acceleration.
Malfunction areas in Automatic transmission
Due to clutch or brake slip, vehicle speed does not follow the engine speed increase.
The symptom significantly appears when running with half throttle.
Due to shifting point failure, both engine speed increase and vehicle speed increase is retard.
Due to the lock up clutch full-time operation, both engine speed increase and vehicle speed increase is retarded