Allen,
I'm getting exhaust explosions! Mixture isn't that rich because the sparkplugs
have the correct beige colour. Sorry, I don't know where to keep a *.sig file so
that it adds itself to the bottom of every email I send out but in any case my B
is a 1973 GT with the earliest HIF carbs (434's), which means that unless
someone
has tampered with them before I got this car, they must still have the
non-overrun-valve throttle discs
Evangelos
73 GT
66 Sprite
78 Mini
60 A40
Ajhsys@aol.com wrote:
>
> Are you getting a backfire through the carbs, or an exhaust explosion out the
> tailpipe? Terminology differs!
>
> Backfire thru the carbs can be an exhaust valve not closing. Exhaust
> explosion can be a too rich mixture or incomplete combustion. Raw gas is
> exploding when it hits the exhaust manifold.
>
> Sorry I don't remember what year and model car you have, but later cars with
> emission controls can have all of these symptoms if the hardware isn't
> working correctly. BTW, if you add your car info to your .sig file, you
> won't forget to put it in your posts.
>
> Allen Hefner
> SCCA Philly Region Rally Steward
> '77 Midget
> '92 Mitsubishi Expo LRV Sport
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