This might be because the carb butterflies are not seating properly,
and kicking the throttle is enough to make them seat. Or perhaps
the advance is sticking in the distributor... Just a thought.
steve
Bill Wood wrote:
>
> Date: Sat, 24 Jan 1998 08:33:39 -0800
> From: Pete & Aprille Chadwell <dynamic@transport.com>
> Subject: TR6 Ignition timing, more questions
>
> Hi folks.
>
> For some reason I stopped recieving the list mail last Friday. I
> finally
> just re-subscribed, and it looks like I may have missed out on some good
> timing stuff.
>
> I currently have my vaccuum retard line connected. I have one line from
> the distributor to the thermo-vaccuum switch, and one line from there to
> the rear carb...it's a '73, so this is correct. Sounds like I should
> disconnect all this. The problem I have with this motor is that the
> only
> way I can get it to idle at the proper rpms is to retard the timing.
> That is, set the timing at 4 ATDC like the book says. Needless to say,
> the power at this setting is quite poor. So, I choose to ignore the
> book and advance the timing (with hoses connected) to *I THINK* around 8
> BTDC, or as far as I can while keeping the idle below, say, 1100 rpms.
> The carbs are bottomed out. I can't reduce the idle speed any further.
> Why is this? Has anyone learned a way around this? I'd like to advance
> the timing more, because I'm sure there's more power to be enjoyed up
> there, but I can't stand sitting at a light with the engine buzzing away
> at 1500 rpms!!
>
> Pete Chadwell
> 1973 TR6
> CF10732
>
> Pete,
>
> My 73 is exactly as yours. Carbs rebuilt 9 years ago, but with probably
> 3500 or so miles on them. I run even a further advanced ignition, about
> 12-14 degrees, depending on whether it's summer or winter when I time
> the car. My idle too wants to race to about the 1500 rpm range _if_ I
> don't
> consciously kick the pedal really hard to bring the idle down. I may
> have to do this once or twice, and I SHARPLY floor it. This usually
> brings the idle down nicely to about 800-850 rpm. Might be worth a try
> for you.
>
> The one thing I have not been able to determine is if there is anything
> mechanical internallly that is hanging up that makes me have to do this
> to get my car to return to a decent idle.
>
> Bill Wood
> 1973 TR6
> 1979 TR8 Coupe
> 1980 TR8 Coupe
> 1981 TR8 F.I.
> Greensboro, N.C.
|