The engine have random starting vibration & noise

[Mathieu]

Symptoms:

1. The engine start with a king of vibration and noise stop and then continues the starting,
2. The engine seem to have difficulty to start on windy time
3. The engine lose power and gain power randomly
4. The brake pedal seem hard and lose when applying the brake on a random pastern
6. Random automatic transmission shift (hard and smooth shifting)
5. Check engine might light up with bad catalyst converter and bad lower O2 sensor.

Solutions:

1. Lubricate with good temperature resistant lubricant and search for debris inside the throttle wire sheath
2. Lubricate the gas pedal string and the pedal spring , in the cab, with penetrating oil.

Why:

With wire controlled throttle, you need to have a good synchronize movement for air and gas. If the wire of gas move slower and even is stuck, the mixture of air and gas will be different and the combustion with not taking place and you will have lower engine power. The automatic transmission and brake are link to the engine power. The transmission need mower to shift properly as It supose to do and the brake need the suction of the engine to puch the oil to the brake.

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