Ring blow by, improper valve adjustment, crack in the intake manifold or in
spacers, bad plugs, not enough spark, bad timing, blown motor, bad kanuter
valve... Though could be just need to adjust the carbs for the higher RPMs.
Seriously though, before adjusting your carbs, make sure your valves are
properly adjusted. That'll really throw things out of wack if they are not
adjusted properly. BTDT. Caused the same issues you have...
TJ
-----Original Message-----
From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net] On Behalf
Of timfboston@aol.com
Sent: Saturday, April 23, 2005 4:20 PM
To: mgs@autox.team.net
Subject: Carb Adjustment
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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