isn't pulling the leads from the plugs meant to fry an electronic ignition?
___________________________
Dr. Joseph Garner
University of California
Department of Animal Science
One Shields Avenue
Davis
CA 95616
USA
Phone: (530) 752 1253
> -----Original Message-----
> From: paul.hunt1@virgin.net [mailto:paul.hunt1@virgin.net]
> Sent: Wednesday, February 28, 2001 6:55 AM
> To: wtsnyder@juno.com; mgs@autox.team.net
> Subject: Re: Engine Running Rough
>
>
> No 1 plug may not be firing. Clip your timing light onto
> each plug in turn
> and check that it flashes. Alternatively remove the lead
> from each plug in
> turn and connect it to a spare plug which you lay on the
> block - check that
> all spark. Could still be a bad plug, though, 'cept you have replaced
> yours. Another way is to remove each plug lead in turn (if
> you do this with
> the engine running watch out for shocks) and listen to how the engine
> responds. If the rough running gets even worse on three of
> the cylinders
> but remains the same on the fourth, than that cylinder is not
> firing for
> whatever reason. Then you have to determine why.
>
> PaulH.
>
> ----- Original Message -----
> From: <wtsnyder@juno.com>
> To: <mgs@autox.team.net>
> Sent: Wednesday, February 28, 2001 1:52 PM
> Subject: Engine Running Rough
>
>
> > Hello list. I'm back to a problem I've been ignoring to
> work on other
> > things for the past month. I purchased a '72 BGT with a
> later 1979 18GV
> > engine. It was running very well at the time of purchase
> except for a
> > very loud aftermarket fuel pump (the little box type). After a short
> > jaunt to town and back, I was climbing the last hill in my
> driveway when
> > the engine began acutely running very rough. Plug #1 one
> seemed to be gas
> > fouled. This engine is fitted with aftermarket sidedraft
> Mikuni carbs and
> > has the 1975-1980 45DM distributor with electronic ignition
> (amplifier
> > box mounted on passenger fender well under coil).
> >
> > Since the initial episode, I have:
> > 1) Replaced the dizzy cap (it appeared to have a hairline crack near
> > where the #1 plug wire attached).
> > 2) Replaced the plug wires.
> > 3) Gapped and fitted new plugs.
> > 4) Replaced a leaking fuel tank.
> > 5) Replaced the fuel pump. (Special thanks to Barney Gaylord for his
> > advice and tech article on aftermarket low cost fuel pumps and their
> > fitting!)
> > 6) Rebuilt rear brake cylinders.
> >
> > Yesterday, I put petrol in the tank and cranked the engine.
> It still runs
> > just like it did before the work.
> > Any advice on where to go from here? I have a timing
> strobe, but I am a
> > neophyte in its use. Could the timing chain have slipped a link and
> > thrown the timing way off?
> > Everyone's input and advice is appreciated as always.
> > Bill Snyder
> > '66 MGB
> > '72 BGT
> > PS I was able to purchase the '72 BGT parts car with LH
> type OD tranny
> > for $200. I plan to eventually fit that tranny on this
> problem GT if I
> > can get her running well.
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