20-10-2019, 08:00 PM
If the car is running well and ticks over evenly when hot, It appears that all is well. Modern fuel mixtures tend to burn cleaner than the 'old' petrol. hence the greyer colour.
If you are running on a Zenith 26VA carb, if the car is ticking over hot, snap the throttle open and let it fall back to its stop as the engine picks up. It should pick up cleanly. If, when the throttle is released, the engine slows, dips and then picks up back to idling speed, the mixture is too weak.
Hope this helps.
If you are running on a Zenith 26VA carb, if the car is ticking over hot, snap the throttle open and let it fall back to its stop as the engine picks up. It should pick up cleanly. If, when the throttle is released, the engine slows, dips and then picks up back to idling speed, the mixture is too weak.
Hope this helps.