Mick,
..when the piston is lifted the rpm's should pick up momentarily and then
fall to stall speed, if it "settles" to normal then it is still too rich.
Check your spark plugs for being overly black from the previous condition.
It may take some time to clear them and the valve seats from too much carbon
build up...
Dave
Frogeye@SWCP.com Taos Garage Annex in Albuquerque
'62 BT7 MK II, '54 BN1, '62 Fiat 1600S
http://www.britishcarforum.com/TaosAnnex.html
----- Original Message -----
From: "Mick VanderPloeg" <MVANDERPLOEG@nc.rr.com>
To: <healeys@autox.team.net>
Sent: Sunday, May 09, 2004 2:32 PM
Subject: Carbs fixed, but still runs rough
> A few weeks ago, I was trying to adjust the mixture on my "H" type
> carburetors, & accomplished nothing other than causing a fuel leak. So, I
> rebuilt the carbs (with the jets polished smooth), and it appears that the
> leak has indeed been stopped. While I was in there, I also discovered, as
> someone on the list had suggested, one of the adjusting nuts had frozen to
the
> jet bearing. So, with the carbs installed and both adjusting nuts turning
> freely, I adjusted the mixture until the engine sped up slightly and then
> settled to normal when the piston was lifted. I went out for a test
drive,
> hoping to have solved the problem I was having in the first place, which
was
> rough running under load. No dice.
>
> The engine fires immediately and revs very smoothly, but, under
acceleration
> runs very roughly. The problem's more pronounced above 2,800 - 3,000 rpm.
> The fuel pump's new, there's a new filter between the tank and the pump,
the
> fuel lines are new, and the screens in the carburetors are clean. I did
have
> the tank cleaned up and "sloshed" with sealant early on in the restoration
> (before I found out this was a bad idea). Could the "sloshing" have
gummed up
> the fuel pickup in the tank? Would this cause the problem I'm describing?
>
> By the way, all ignition components are new and the valves are adjusted
> properly.
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