Hello Dave,
When you adjusted the valves, did you find that any of the exhaust
valves were set too close ? I don't know off-hand what the exhaust
clearances should be, but for instance, if they should be 0.010"
did you find one (or more) that were 0.002 or 0.004" before you
re-set them ? If those exhaust valves were running with not enough
clearance, it could be that one of them has `hung open' for too
long and had the sealing lip of the valve itself burnt to the point
that it fails to seal that cylinder. A compression check (and leak-
down check, while you are at it ) may be the next step, if you can
not find any wire or ignition related problem.
Good luck,
Tom Tweed
SW Ohio
(Dave wrote :
>I couldn't leave well enought alone and decided to try to get my 78 Spitfire
>to run a little better. The car has a set of dual SU HS2, all I wanted to do
>was to adjust the mixture setting. It was running pretty good but just a
litt
>le
>too rich. Is started to adjust the mixture and it started to miss, things
jus
>t
>kept on getting worst and worst. I give up and changed to a new set of
plugs,
>that got the car to running without any miss. So, I continue to adjust the
>carbs somemore and the same thing happen.
>
>After about 1 hour of trying to get the car to run without miss I gave up. I
>figure there must be something that was on the edge of failure and this
pushed
>it over. Now, I have a new set of wires, rotor, dist. cap and a Lucas Sports
>coil. I thought it was the coil going on me but with all these new parts
>the car still run very rought and it is not running on all cylinders. Does
>anyone have any idea what might be wrong. I didn't touch the timming but
>while I was waiting for the parts I adjusted the valves. Any suggestion
^^^^^^^^^^^^^^^^^^^^^^
>will be very welcome.
>
>Help me please :(.
>
>
>Dave |\ | | |
>_______________________________________/\ /\ /\_____| \|_____|
|____________
>Dave Chu \/ \/ | /| | |
>Dept. of Elec. & Comp. Eng. |/ | | |
>Concordia University Voice:(514)848-3115 Fax:(514)848-2802
>1455 de Maisonneuve W. H915 Email:dave@ece.concordia.ca
>Montreal, Quebec, Canada H3G 1M8 http://www.ece.concordia.ca/~dave/addr.html
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~
|