Back in my colortune days wiser heads than I reported that I had to
set the mixture one flat on the adjustment nut towards the lean end
after I got the color right.
This worked for the TD, but on the BGT it was more like 1 1/2 - 2 flats.
Hope this helps?
Scott
52 TD
74 1/2 BGT
On 4/23/05, timfboston@aol.com <timfboston@aol.com> wrote:
> I set the mixture on my carbs (SU HS4) using the colortune. The engine revs
>fine in neutral, but when I try to drive it hesitates with no power from
>2000-3500 RPM. If the choke is pulled out (with the engine warmed up) the car
>runs great with lots of power. This makes me think that I need a richer
>mixture, but the spark plugs are sooty black to make me think that it is too
>rich. Any suggestions?
>
> Thank you,
>
> Tim
> 1971 MGB
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