Now I am experiencing LESS black smoke and Less MPG. No other changes or adjustments have been made. That was 2 weeks ago. I have owned my 83 300TD for over a year now and love it. And without the help of this forum and the people who contribute to it I wouldn't know 1/10th the info as I do on old merc's, so mucho thanks to all. I haven't had anything to contribute really until now...
I always fill the tank and reset the odometer when I fuel up. The last 2 tanks after cleaning the banjo bolt on the back of the intake manifold, which was 95%clogged, (just a pinprick of light visible through it) I have averaged just over 23mpg. Up until then, I got at least 25, sometimes 27mpg. I have noticed maybe a small increase in power. Also noticed is a lack of black smoke when I floor it. Is this because the ALDA is allowing more fuel into the engine and that fuel is burning more efficiently? The first tank after cleaning the bolt I probably did floor it more than normal, just to see the results, so I wasn't surprised to see the mpg drop, but it hasn't returned to what I have been used to. Any ideas from the Peachpits experts? Thanks for the time...

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83 300TD 219K HOMER

Black smoke is unburned fuel (less efficient)
Cleaning the bolt essentially "unlocks" extra fuel (only when the turbo is boosting).
More fuel used=less mileage.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

However, Valve Adjustment,Timing Chain "Stretch" (It wears),IP timing ALL
effect Fuel Economy.

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'84 300SD sold
124.128

Stop flooring it

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42

are you talking to yourself again?

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1985 300D cali 190K

http://mercedes.thatchermathias.com/mw300d.jpg