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Sunbeam-mike
United Kingdom
175 Posts |
 Posted - 25 Apr 2026 : 13:31:44
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Hi folks,
The car drives very well. No complaints.
However, trying to set the idle speed has always proved difficult.
DCOE40 carbs.
If on a particular day the idle is a little low, I wait until the engine is properly warm before trying to adjust to about 800-1000rpm.
As I get near to the magic 800-1000, I pause the adjusting but the idle starts creeping up to about 2000rpm. The adjustment is then of course backed off slowly and as before, when it's close I pause. The idle now drops to 500 or below, often stalling.
I remounted the carbs a while ago, replacing the 'o'-rings and hardware, then checked the balance and mixture (Colourtune), but this problem predates that.
I thought maybe the progression holes may be blocked. But on all the carbs? It's quite even idling whatever the speed.
I wondered if the collective could shed any light.
Thanks for any comments.
Mike Hooper |
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'My 68 fastback idles anywhere between 500 and ..'
