Re: [T3] vacuum advance + squareback's full story(rather long)

["Barry Viss" <bviss@thekeyboard.com>]

> >     But if it is broken how on earth did I get 33 mpg a while
> > back?  However city driving I don't get as good of milage as I
> > should ~18 mpg, do these symptoms match?   If y'all think I need
> > one, does anyone have a good one of these they could sell me?
>
> 33 is awfully high. I doubt if that was a good number. More likely it
> was the result of a tailwind or not filling the tank completely.

I trust the 33 mpg figure.  I have gotten 27 and 28 before, and this was on
a two way trip/two hour each way/freeway driving with no cargo except me and
a friend.  I am quite sure I filled the tank all the way since the next time
I filled up the tank the milage was right where it usually is, not low, like
if I hadn't filled it all the way the last time.

> 18 mpg sounds awfully bad, so you should check other things as well,
> but replace the vac adv can anyway.
>
 I agree this is low, what other things should I check.  I put in and
adjusted new points, statically timed the timing, adjusted the valves, I use
the highest octane gas, voltage is around 13 1/2, I have NOT checked the
compression yet...   um...maybe some other stuff which I can't think of
right now.

Also, when it's cold in the mornings it sounds like one cylinder is not
firing, or at least not working right, and after a minute or two there is a
definite point where the last cylinder kicks in and it smoothes out, it's
not a gradual thing.  Again,
this is all just what it sounds like to my inexperienced ear, but my
brothers notchback is nice and smooth even when it's cold, so I have
something to base it on.  I also put in new spark plugs and expected to see
some inconsistency on the old ones because of this problem, but they were
all identical. Some time when it's doing it real bad, and I have time, I'll
take off the
plug wires one at a time so I'll at least know which cylinder it is.  What's
left to check?, fuel injection?  :(

And another thing, it seems to hesitate a little, especially when it's hot:
if you punch it, it will slow down, make a low "whump" noise, and then
quickly speed up to normal. This could be normal for an old four cylinder
car, I don't know, I'm  new at this :)  It also seems to have less power
than my brother's '65 notch even though his has a smaller engine, but this
too could be normal for dual carbs(his) versus F.I.(mine) as I have heard.

I'm running out of ideas. I'd appreciate any from you guys.
Thanks

Barry Viss
'68 Square.





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