What is the reason why the epc light is on when the oil-gas dual-purpose vehicle refuels, but the vehicle jitter is serious when refueling?

Because the throttle body is too dirty, this situation can only be solved by cleaning the throttle body and re-matching. Damage to throttle electronic control unit, damage to engine control harness, failure of accelerator pedal position sensor, leakage of crankcase ventilation system, leakage of air intake system, failure of brake light switch and ablation of brake light bulb will also cause epc light to light up.

Reasons of fuel truck jitter when epc light is on;

1, dirty throttle will cause idling jitter.

2. The failure of spark plug will cause the vehicle to recover slowly and shake.

3. If the cylinder of the starting mechanism does not work, it will also lead to idle jitter, and there will be vehicle jitter when the vehicle knows the low speed and lane speed.

4. The rubber parts inside the engine bracket and the gearbox bracket are aging, which leads to vehicle idling jitter.