[Healeys] Backfiring thru the carbs

[Al Fuller]

Humm, lots of possibilities there (e.g. fuel gone bad, rodent damage to
wires, something amiss in the engine build, etc).

It sounds like it starts and runs, so that's good.

You might walk through the workshop steps for engine timing and carb setup,
just to ensure the basics are correct. It's tedious but likely to reveal
something.

________________
Sent from my phone
Best Regards,
Al Fuller

On Sun, Sep 28, 2025, 12:26 AM warthodson at aol.com <warthodson at aol.com>
wrote:

> The car has sat dormant for many years. It has not been driven for many
> years & is in rough condition. It has had the engine rebuilt, but I do not
> have any info about what was done.
> Gary
>
> On Thursday, September 25, 2025 at 06:22:07 PM CDT, Al Fuller <
> alfuller194 at gmail.com> wrote:
>
>
> Gary, I'd echo what Harold asked:  What was changed before the car started
> acting up? Or, did it appear to start backfiring spontaneously?
>
> Often the issue is "maintenance induced".
>
> ________________
> Sent from my phone
> Best Regards,
> Al Fuller
>
> On Fri, Sep 26, 2025, 6:57 AM Harold Manifold <manifold at telus.net> wrote:
>
> At what throttle position does the backfiring occur? One possible cause is
> the timing is too far advanced. Are you able to check the timing at the
> point of backfire? Has any work to the valve train been done prior to the
> backfiring? I would suggest resetting all of the valve clearances.
> Harold
>
> On Thu, Sep 25, 2025 at 2:21 PM warthodson--- via Healeys <
> healeys at autox.team.net> wrote:
>
> A club member's BJ8 is backfiring thru the carbs, HD8's. We have adjusted
> the timing & enrichened the carbs. I plan to revisit both of those
> settings. What else might be causing this?
> Thanks,
> Gary H.
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