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[T3] Engine/backfire


This is where Keith set his timing with his dual carb notch, so I did the
same.
Let me ask you, when I'm driving on the highway, I can hear a low ticking
coming off the guard rails. Not pinging (I've had that - bad gas). I can't
tell with the engine cover off what it is because its so noisy in general
and my ear is untrained and unfamiliar with a properly tuned engine.. And
when I'm at idle, all I hear is the exhaust steadily puttering. I can't
make the sound out. Maybe I'm getting too paranoid? Checking my valve
clearance this weekend.

Also, every now and then, especially when warming up, I get little
backfires. Tiny and occassional, but sort of like a miss. Before I put in
the new distributors and sparks, when I was up at Keith's he noted the car
was too rich because it was so sluggish starting up and then noticed only
two cylinders were firing. I figured this had to do with fouled up plugs
and once the car had a few minutes to warm up, all four cylinders were
running again. I have the new distrib and the carbs synced but every now
and then....pop pop.

I'm using Castrol SAE 30 oil, which is pretty heavy, but that was a four
hour drive nonstop. I guess I'm wondering if backfire is a sign of
over-richness or what.
I have new plugs in now, and a new used centrif/vac distributor timed at 3
ATDC.  God only knows how long it'll be before the sparks are munged up
since I cant get any idea what the proper mixture on my carbs is. Long
process of trial and error.

Any comments would be useful.

Mike
72 SQBK
man trans/1600/dual Weber 34 ICTS (SOMEONE GUIDE ME TO THE JETS ON THESE
THINGS! I CANT FIND THEM!)


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