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Carbs stall from cold with choke out ...


Camo

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Posted

as the title suggests starting from cold my Vitesse runs fine while driving etc but when stopped at junctions it refuses to run and with the throttle left alone it will stall very quickly or if it doesn't stall when I pull away the carbs just fade then restart is a pain for a few seconds. I need to keep revving the car at junctions to keep it alive.
It has got steadily worse over the last few weeks and is driving me crazy, once warmed slightly but with choke still required it is fine its just the early 5 mins of driving......
any ideas ?
it probably needs service parts as I done over 9k since the last tune up / service or is it Carb based problem ?
thanks
Stuart

Posted

It sounds like the set-up of your choke to me. If my car was exhibiting such habits I would be looking at the choke set-up with the lost motion lever which should engage some throttle. It sounds like your set-up is not doing so. If you are running strombergs I wouldn'y have a clue how to adjust but I would imagine that it is the choke that is not doing as it should.

Neil

Posted

Running twin strombergs as per standard, it does engage the throttle but only really evident when warmed when it revs at 1100 with choke on but before warmed slightly it just wants to stall..
Stuart

Posted

Well I have mine adjusted so that the choke, when the engine is cold, lets the car idle at 1500RPM. I gradually ease the choke off so that the idel stays above 1200RPM until the engine is warm and choke fully off. Sometimes I try and reduce choke too soon and I can tell immediately that the car is unhappy.

I certainly could not leave the choke on full or even half when the engine is warm as the revs would be 3000+ (I imagine).

I am sorry that I don't know about Strombergs and how to adjust the choke for perfect operation.

best of luck, Neil

Posted

I have set the throttle to as high as you have suggested and initial tests from cold seems to have done the trick, no stalling and revved freely I will find out tomorrow morning on the way to work, thanks Neil..

Stuart

Posted

that was a much better experiance but still need to get the settings right..
cheers for the help

Stuart

Posted

really good this morning, I seem to have fixed the problem, as for diaphrams, I know there are some but never looked to see where...
ignorance is bliss

Stuart

Posted

to access the diaphragms remove the 4 screws holding the dashpot top cover  lift it off and there it is,  careflly remove the slinky spring and lift out the damper and diaphragm,  examine for splits, if its groan and baggy wash in petrol to return to size and refit with the small lug on the perifery in the relief of the housing this positions the piston,  if its perforated replace it.
this will not upset any setting, unless you have been trying to set the mixture with a holed diapragm  in which case best to recentralize the jet and re adjust the mixture    peter

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