Mark,
Sounds like you might have a flooding problem. I had the same symptoms:
light popping on deceleration, uneven running at lower speeds but it would
run fine at higher speeds. It may be that at the higher speeds you're
pulling more air into your mixture and it's helping even things out but at
lower speeds your idle suffers from too much gas. If you have some
contaminated fuel (varnish, rust, etc.) that could cause the fuel chamber
needles to foul and cause some flooding. Feel the bottoms of the float
chambers...any gas? If it's wet from the gasket down...you may have
flooding. If it's ONLY wet at the bottom plug and NOT between the gaskets
and the plug then it could just be the o-rings on the plug. If you think
you have flooding pull the bottom of the fuel chambers (6 screws on each)
off with the carbs still on the car and dump the contents into a white
bowl...see any black specs? That could foul the needles. I fought this
problem for a long long time. You can try fuel filters between the fuel
pump and carbs but my ultimate solution was pulling/cleaning/lining the gas
tank. No flooding problems since.
Be careful putting the fuel chambers back together. Make sure the gasket
and float are in the proper position.
Good Luck
Bud Rolofson
71TR6 CC57365 (Good 6)
66TR4A CTC57806 (The Wreck-Almost Parts)
66TR4A CTC57529 (The Project)
----- Original Message -----
From: "Mark Hooper" <mhooper@pixelsystems.com>
To: <triumphs@autox.team.net>
Sent: Monday, June 17, 2002 10:01 AM
Subject: Uneven running on TR6
> Hello list:
>
> Last week I polled the list about my smelly, guzzling TR6. The concensus
was
> that she was running way too rich. So I equalized the needles and backed
up
> to more lean. Specifically, the needles were set level with the piston
> bottoms and then richened 3/4 turn. Most of the fuel smell is gone.
> Consumption also seems to be considerably improved. What smell remains is
> probably oil leaking onto my exhaust pipes. Another seal job to be done
> unfortunately...
>
> However what makes me write is that the job is not completely done. Now I
> hear a little light popping when deccelerating. Not much, but it's there.
> More importantly, it seems that the car is quite uneven when running with
> very light throttle at lower speed. It sounds like she's missing, but as
> soon as a little more gas is applied she evens out and pulls very
> strongly.It's actually quite difficult to drive evenly and slowly in
> traffic. No ignition problems that for sure. Idle is not super/super, but
I
> have her idling at 1000 right now with a little rumbling, but no great
> variation in speed at all.
>
> So what have I got? unsynched carbs (haven't done that yet although I do
> have a unisyn hidden somewhere)? Leaking bypass, compensators? Never
touched
> either of those; they're probably original. Any ideas anybody?
>
> Mark Hooper
> 72 TR6
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