Hi Scott,
Had this on my GT before and still sometimes.
Get those carbs a bit richer and it should be o.k.
This provided the other setups are fine like valves and ignition.
How the know it backfires in the carb - I feel this at the throttle pedal.
Also the sound defintively comes from the engine bay.
When I started the engine 1st time after restoring the car it had be still
for 10 years.
So all carb settings were basic.
Engine was running and all family members came to see where this noise came
from.
That at a sudden a big backfire came from the open carb - family members
were gone instantly - flame of several inches and the bang made them
scared.
Cheers,
Hans '71 BGT
----- Original Message -----
From: "Scott Regel" <Scott.Regel@dpra.com>
To: <mgs@autox.team.net>
Sent: Friday, July 09, 2004 3:48 PM
Subject: Backfiring question
> I have a 76 B with a weber (which I hope to convert to SU's in August).
> When the car is cold it backfires until it gets up to running
> temperature. Two questions....the first is a stupid one...how do I tell
> if it is coming thru the intake manifold or thru the exhaust manifold?
> It makes a spitting noise not a loud bang, so I am assuming it is coming
> thru the carb right? The second question I'm sure you see coming...what
> is causing this? Timing looks good (Lumination), haven't checked for
> any vacuum leaks, possible valve or head problems? It's just annoying
> as I pull out of my driveway (being the second to last house in the
> neighborhood) and have to climb a small hill. It makes the dog bark
> like crazy and the neighbors turn their heads! I got my neighbor across
> the street interested in LBC's, but I think the sputtering scared him
> into buying a TR6 instead of an MG! Ahhhhh! Help!
>
>
>
> TIA
>
>
>
> Scott and Spot
>
> 76B
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