In your situation, the first thing to suspect is a
partial
blockage somewhere in the system, either in the lines,
or the pump, or the inlet of the carb. You should
not waste time replacing the pump, etc. until
you are sure that nothing is blocked. To test
the fuel flow, you can disconnect the fuel line from
the carb and put into a jar, and crank the engine.
You should see generous spurts of fuel.
Make sure to disconnect the coil so the engine won't
start!
Doug Braun
'72 Spit
--- Eduard Tieseler <etieseler@sbcglobal.net> wrote:
> Hello list,
> I have a question about fuel pressure and a larger
> cam. The engine seems to die when I am at freeway
> speeds, I also tried crusing in thrid gear at a high
> RPM at lower speeds and I get the same results. If
> I
> lower the RPM's while this is happening the engine
> come back alive. It will also idle fine if I push
> the
> clutch in while the engine has no power. I have the
> Kent road cam installed. Does it make sense that
> maybe I do not have enough fuel pressure at a higher
> RPM and it is using more fuel than the fuel pump can
> provide? Or does it make more sense that the carb
> is
> not tuned properly? It is a singe weber side draft
> carb and a standard fuel pump. The engine is a '69
> 1.3 Spitfire MKIII. Any help or advice is greatly
> appreciated.
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