John:
If you have a ruptured diaphram in the vacumm retard unit on the
distributor it will cause the hesitation that you are describing, but I
think you would see it in a cold condition as well. If you find it is
ruptured replace it and readjust ignition timing.
Brooks
Atlanta
----- Original Message -----
From: "JPHaeg" <haeg1@mninter.net>
To: "6pack List" <6pack@autox.team.net>
Sent: Sunday, October 14, 2001 8:47 PM
Subject: Problems with setting the dwell
> First a little background info:
> I've owned my car (75 TR6) for about one year now. The engine has always
run
> well during that time, so this has given me the opportunity to do a lot of
> sorely needed mechanical improvements to the rest of the car. Lately the
car
> started to hesitate and physically buck when trying to accelerate. This
> condition was more prevalent in the lower 2 gears, and when the engine was
> warmed up.
> My first assumption was the carburetors, but I replaced the old fuel
lines,
> drained the gas tank of old fuel, rebuilt the fuel pump, replaced the fuel
> filter, added oil to the carburetor reservoirs, and did an ignition tune
up
> first. The car seems to run better, but I'm still chasing the hesitation
from
> the engine.
>
> My questions:
> 1) While setting the points, my dwell meter measured 42 degrees. I widened
the
> gap on the points, and it fell to 40 degrees. My book and the sticker
inside
> the engine compartment say 34-36 degrees. I then open the points much
wider
> than the specified .016" (I could bounce the feeler gauge between the
> contacts), and the lowest I could make the dwell read was 38 degrees.
> Does anyone have some thoughts on this?
>
> 2) I'm going to try new rubber diaphragms in the carbs before I go to a
full
> rebuild. I was told on this list that a hesitation can be caused by low
oil in
> the top reservoir, so I topped off the oil to the proper level (resistance
> observed 1/2" from seating the cap). I have noticed that every time I
check
> this oil level it is down. Is this common, or is it a sign of some
problem.
>
> 3) Any other thoughts on the low rpm hesitation when I try accelerating in
low
> gears with a warm engine?
>
> Thanks in advance for your replies.
>
> John H. in Minneapolis.
> PS: Not too many more top down driving days here in Minnesota. The weather
> guys are already talking about the first snow fall of the season. I figure
a
> month at best.
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