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6 cyl Bristol cars Type 400 to 406 - restoration, repair, maintenance etc |
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![]() Yesterday, at 34°C (93°F) air temperature, I had a problem with my B400: the engine stalled after sudden braking. Afterward, I was able to start the vehicle by pulling the lever on the fuel pump. I wouldn't have expected this, since the fuel is still being flushed from the front. However, there's a short segment after the fuel pump toward the tank.
I've had the vehicle since 2019 and have never experienced this behavior. Is this a known issue? |
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![]() Mine does that occasionally, it’s just because the fuel in the float chambers tips forward , away from the jets. Itll restart normally afterwards.
. It’ll also happen on cornering at high speeds eg really, really fast round a roundabout, or on the circuit, for same reason. The engine cuts out briefly and spectators may report a flash of flame from the exhaust. Vroom vroom! |
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![]() You might consider checking the condition of the pickup screen on the tank unit in case that is slowing fuel delivery to the pump. Modern 10 % ethanol fuel supposedly does long term harm to some of the copper based components of the fuel system. The screen on my 403 had all but disintegrated and I spent quite a while blaming the carburettors for poor throttle response before the real problem was diagnosed by Coleman Classics.
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