Inside Line: RMI

Diesel – excessive smoke from exhaust, no running issues and no fault codes – EGR valve blocked with carbon, more prominent on low mileage vehicles.

Petrol – Intermittent poor throttle response/flat spot, no fault codes – Faulty throttle position sensor.

Petrol with supercharger fitted, severe flat spot at all engine speeds under acceleration – split vac pipe directly under the supercharger.

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