Engine Hesitation is caused by inaccurate engine timing abnormal fuel or faulty sensor & actuator. The purpose of the "Basic Inspection" is to check engine timing, fuel condition and sensor & actuator.
Engine "ON" and warm up the engine until cooling fan is operated.
Connect a scantool to Data Link Connector(DLC).
Check current data.
Specification :
Normal condition of the timing belt : CMP fall edge : 38 teeth, CMP rise edge : 98 Teeth
- Small tension of the timing belt - Around 1 tooth is difference from normal condition.
- Large tension of the timing belt - Around 3 teeth is difference from normal condition.
Abonormal condition of the timing belt
- Jumping 1tooth across timing mark - Around 5 ~6 teeth is difference from normal condition.
Are current data of the "CMP FALL EDGE / CMP RISE EDGE " OK?
YES
Go to "fuel inspection" procedure.
NO
Replace timing belt and reassemble engine timing system.
IG "OFF"
Remove the fuel pump and inspect the fuel condition.
Is the fuel normal?
YES
Go to "Sensor and actuator inspection" procedure.
NO
Replace the fuel.
■ Characteristic of abnormal gasoline
1) Toxic odor
2) Eyes stung
3) Hard vaporizing
4) Knocking suddenly after fuelling up
5) Hard starting after fuelling up(In the winter)
■ Influence of abnormal gasoline
1) Knocking
2) Excessive fuel consumption
3) Poor power/acceleration
4) Fuel system damage such as fuel pump, Injector and component of the combustion-camber damage (pistion etc...)
5) Deposit rising or corrosion (in the engine and fuel system)
6) Fuel pressure decrease or Engine stalling by vapor lock.
7) Impossible starting by low volatile
8) Discharge carcinogen
9) Discharge pollutant(CO, HC, NOx etc...)
