How to Check if Engine Hesitate when Acceleration?

Field Case Study of Hyundai Trajet due to spark plug wire the engine will hesitate when accelerate.

How to check if engine hesitate when acceleration?

Model: Hyundai Trajet V6

Year Model : 2004

Fuel : Gasoline

Displacement: 2700cc

Subject: engine hesitation – Spark plug wire.

1) Condition

1. Engine hesitation when starting in cold condition.
2. Poor engine power in warm condition.

2) Cause

• Number 1 spark plug wire is cracked.

3) Diagnosis

1. Scan tool check (DTC)
   = No trouble code
2. Inspect the engine condition with spark plug cable removed one by one.
   ( in  engine starting condion)
3. Inspect wave form using scan tool.
   = Abnormal wave form in # 2 cylinder.
4. Check the spark plug wires.
   = Abnormal condition (Number 1 wire is cracked).
   = After replacing the spark plug wire, the engine operates normally.

4) Repair Guides

• Replace the spark plug wire with new one.

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