>
> I finally decided to see how far off the timing mark was by pulling
> the #1 plug and finding TDC. Guess what, the timing mark was right on.
> This means I've been running probably 35-40 deg. BTDC (can't really
> tell because it's so far off the scale.) Spec says it should be 10
> deg. static timing or 14-20 deg. (depending on which book I look at) dynamic
> timing. Well, I tried it at 10, 14, and 20 deg. BTDC and while it
> does idle somewhat better, under load it bucks and sputters and
> backfires (gee maybe it wasn't the Weber that was my problem.) I
> haven't reset it back to where it runs well yet, I wanted to get some
> opinions on why it would require so much advance to run well. The car
> currently has HIF4 SU's, with all of the pollution control stuff of.
> BTW, the centrifugal advance does work.
>
> Any thoughts?
>
> Thanks,
>
> Bob
>
>
Bob, of what you have told of the running now, I would look at the
valve timing and run a comprestion test. Also conect a vac. guage
to the intake man this will give you a go indicator or the valve
timing and comb.
Let us know what you find.
|