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6 cyl Bristol cars Type 400 to 406 - restoration, repair, maintenance etc

Fuel starvation (403)

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Old 29-03-11, 11:52 AM
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To clarify a little, I was at the bottom of the hill (not very steep) in traffic traveling, slowly at low revs.

Had the car tuned yesterday. Southern Carbs said there was little wrong. There was a slight ovality of the (butterfly?) spindles which allowed a little air past at low revs which causes a little hunting. 3 & 4 pots are burning oil which they thought was causing the mis fires and the clutch is dragging.

A new MG B clutch has been fitted. It doesn't bite until the end of travel which I am not very keen on, but I am told that is the way of modern clutches. When disengaged engine revs drop by some 300 revs.

The engine was reassembled with new rings and the clutch fitted coming on for a 1,000 miles ago. It has been carefully run in with occasional squirts upto 3,000 and then 4,000 revs latterly.

Regards, Peter

Last edited by peterg; 29-03-11 at 11:53 AM. Reason: mistype
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Old 29-03-11, 03:28 PM
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Start with replacing the cheap bits that can cause this sort of problem. Condenser, fuel filter, points and electrical connections and move onto the other suggestions until all is well.

Normally the last thing you try that fixes it :-)
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Old 31-03-11, 04:19 AM
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I would first check the spark plugs, to see how the engine runs. Too rich fuel/air mixture?
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