Nick,
Sure someone didn't start changing your settings behind your back :)
I think your choke is hanging up which could cause a high idle, and because
it's rich, can cause the bog.
2000 RPM idle - Make sure the idle screws didn't change and that the
carburetor linkage is set right. I would disconnect the linkage and see if
those items are causing the problems if it isn't the choke.
After getting the idle right try the piston lift method to find out if your
mixture is right or see if the idle speed increases which is also a simple
test for mixture - at least at idle.
FWIW, the oil doesn't lubricate the needle it's used to keep the piston from
rising to quickly - that's all it's used for. Gasoline lubricates the
needle.
Mike
----- Original Message -----
From: "Nick Turi" <nturi@otw.com>
To: <datsun-roadsters@autox.team.net>
Sent: Saturday, November 24, 2001 3:39 PM
Subject: 1600 SU carburetor question
> 1600 SU carburetor question
>
> Can someone help me to determine what might be wrong with my car? The
> engine bogs down when warmed up and running at about 2000 rpm's. It also
> seems to be eating the oil that lubricates the needles. (top hand
tightened
> caps at the top of the carburetor). I am using a light transmission oil in
> the carburetors. It sound like the air and fuel mixture might be wrong. It
> was running smooth when driven to the Glen in September. All of a sudden
> this happens. The carburetor has all new needles, jets and gaskets prior
to
> the trip in September.
>
> Thanks in advance for your help.
>
> Nick
> 1966 1600
>
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