"Hutmacher, Greg" wrote:
>
> Okay, I've learned my lesson...if it ain't broke, don't fix it. I made the
> mistake of trying to fine tune my Strombergs last night on my 76 TR6 even
> though they were running pretty well. I suspected my fuel/air mixture being
> a little off. Anyway, I tried out my new Colortune for the first time and
> now have totally screwed up the carb adjustment. I used the special
> adjusting tool with the hex key and the barrel that fits into the top of the
> dashpot. I got frustrated because no matter which way or how much I turned
> the adjustment tool, the Colortune never showed any changes (medium blue
> with occasional bright orange flashes). I made the mistake of continuing to
> turn the adjustment tool trying to get a deeper blue color on both carbs. I
> screwed something up because the color never changed but now the car runs
> much worse. The car idles rough where it was smooth before, when I
> accelerate hard, it seems to not have as much power and sounds "deeper". I
> also did the test where you lift the carb piston up and the idle dropped
> drastically (tried to stall). One thing I wondered is if I may have torn the
> rubber diaphram on my rear carb in trying to turn the needle because it was
> really hard to turn (as opposed to the front carb which turned fairly
> easily). This weekend, I'll take the dash pot covers off and check the
> diaphram and whatever else I can see. Any ideas? Also, what weight of oil is
> best for the dashpots? By the way, the guy at TSI told me that the
> Strombergs have almost no adjustment in the fuel air mixture. He said no
> matter how much you turn the adjustment, there is almost no change in the
> fuel air mixture on Strombergs since they are "tamper proof". This seems to
> be supported by what I saw on my Colortune. Thoughts?
> Thanks, Greg Hutmacher (bummed out because my formerly smooth running six is
> now running like crap)
Greg, while a torn diaphragm is possible, you may more likely have
undone the needle from the holder. Take the lid off and pull the tube
out. The needle should be hanging from it. I never had any faith in
Colortune on the smogged TR6 because the needle adjustment possible is
very small. I always found checking the color of the plugs more useful,
and balancing the "suck" with the old rubber hose in the ear routine!
Stu
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