[ROVERNET - UK] Mixture problems
iudkuy wcygiohs
iudkuy at yahoo.com
Mon Oct 15 09:37:01 BST 2007
Steve
I fitted a pertronics system to my 105S and had
misfire problems. It came down to the flamethrower
coil. Fitted a different coil and problem vanished.
Flamethrower maybe should be called "bintosser."
Peter B
--- Steven Dibdin <sdibdin at hotmail.com> wrote:
> Hi Rover Gurus,
>
> I've recently fitted a petronix ignition system to
> my '68 2000 TC along with
> their 'flamethrower' coil (god awful name by the
> way). Timing is spot on, I
> had to replace the old worn out advance weight
> springs as they were weak
> with age. I have checked the advance curve with a
> strobe light and tacho
> against the specs for my engine (10:1 compression)
> and that is as it should.
>
> My problem is that the fuel mixture seems to be off
> now. If I set the carbs'
> at idle using the workshop manual method of lifting
> the pins and getting the
> idle to rise then fall it runs a little rough at
> idle, after a few minutes
> of running the plugs get sooted up. Suggesting it's
> too rich at idle. On the
> road however, it runs far better than before, better
> acceleration, more
> responsive and a smoother delivery of power.
>
> If I adjust the mixture at idle using my colourtune
> the idle pretty smooth
> but it is running too lean on the road, power's
> lacking until I pull out the
> choke to enrich the mixture.
>
> So my questions are: Has anyone else found a similar
> problem after changing
> over to Petronix? Did they go for different needle
> profiles to accommodate
> the new system? Do I need to find a rolling road to
> tune with new needles
> now?
>
> Anybody out there have any suggestions?
>
> Many thanks,
>
> Steven Dibdin
>
>
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