Jorge -
Sounds to me like you have leaky throttle shaft bushes. Get Norm Nock's
teflon bush replacement kit and replace the throttle shaft bushes (and
shafts while you are at it) on your carbs. Trust me... it's a little bit of
a job but well worth it. It will remove any idle speed fluctuation,
forever.
Regards,
Alan
'52 A90
'53 BN1
'64 BJ8
On 10/17/06, Jorge Garcia <fortee9er@yahoo.com> wrote:
>
> My 1965 BJ8 would not maintain a steady idle speed after reaching
> operating temperature and the choke was off. The engine would stumble and
> die while waiting for a traffic light. I checked my AH Haynes manual, a
> couple of books on SU carbs and Norman Knock's Tech Tip book. I used
> Norman's technique for adjusting the carbs, I fiddled with the idle speed
> and then with the idle mixture screw until it idled steadily. I drove it for
> a few miles and it did great it did not stumble while waiting for traffic
> lights to change. All that changed Saturday when I was showing off to my
> son-in-law and accelerated fairly hard coming off a traffic light. As soon
> as I let off the gas I could feel that something had changed, the engine was
> not running as smooth as it had a few minutes before. When I pulled to the
> next traffic light the engine stumled and wanted to die so I had to keep my
> foot on the gas to keep it from dying.
> Why would revving the engine cause the carbs to loose their adjustment?
> One last thing, I did not perform the last step of Norm's adjutment
> procedure for checking choke and linkage adjustment. This the one where you
> stick your finger into the carb's throtle body and check that the butterfly
> is fully open while "a friend" has his foot buired in the gas pedal with
> engine running at full speed. What is going on with my carburetors?
>
> Thanks
> Jorge Garcia
> Houston, TX
> Everyone is raving about the all-new Yahoo! Mail.
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