Dennis -
Popping usually suggests you have a lot of unburned fuel getting into
your exhaust. I'd pull all of your spark plugs and see if any of them
look black or wet. If so you probably have a bad plug.
By the way, have you gapped your rockers? If your rockers are way off
you can get popping too. Torque head and do rockers before doing your
tune up.
Finally, are you using your old coil or a new one?
Alan
On 5/24/10, Dennis Gavin <djg@gavinassociates.com> wrote:
> I'm hoping the list doesn't feel this question trivial or unworthy but let
> me try. I'm still sorting my 63 BJ7 after a two year, frame off, resto and I
> still seem to have bugs. When I back off throttle I get loud popping
> bordering on backfire in intensity. New plugs & points and my attempt at
> tuning the carbs to proper mixture have all been done. Can anyone give me a
> direction or is this not an obvious problem? As always, I treasure this list
> and appreciate your efforts to help. Thank you.
>
>
>
> Dennis Gavin
>
> 63 BJ7
>
> 63 E Type Roadster
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--
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Alan
'52 A90
'53 BN1
'59 Jag Mk IX
'64 BJ8
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