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#1
07-26-2003, 04:12 PM
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maintain engine power?
over the last few years, it seems like my car has been getting slower and slower.
when i first, started driving it, 6 years ago, it would do 0-60 in 13 sec., and im sure when it was new it was even faster. (not that ive ever seen a road test from back then, if you have, id like to know). now its 0-60 in 15 or 16 seconds. it just hit 170,000 miles, and of course ive always had regular maintinance done by my mechanic, but is there something hes missing? is there some other maintainence i should be doing? should i have something cleaned out or some part rebuilt? Or is this just the nature of old cars and theres nothing i can do about it? 170,000 miles is alot, but not that many, especially for an MB diesel. I like to keep everything on my car absolutely perfect and thats getting harder and harder to do. Whats the deal?
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1991 300 D 2.5 Turbo, 220k also in the family: 1981 240 D 185k 1991 350 SD 185k 2006 S 500 2005 SLK 350 
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#2
07-26-2003, 04:32 PM
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Hondas are getting faster
 The quick thing to check is the line from the intake manifold through the overboost protection solenoid to the ALDA. Soot builds in the line over time and reduces the boost signal to the ALDA. Sixto 95 S420 91 300SE 87 300SDL 83 300SD Any relation to Teri Hatcher's character is Spy Kids?
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#3
07-26-2003, 05:18 PM
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Another thing to check is your throttle travel. My car was anemic, but it had been that way since i had gotten it...until I found out that, with the pedal pushed all the way down, I still had 1/8" of throttle travel to get to the stop. I adjusted the linkage at the injector pump and it's like I have a whole new car...and it'll definitely run with, and maybe even outrun my mom's Civic
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2001 VW Jetta TDI, 5 speed, daily driver 1991 Ford F-350, work in progress 1984 Ford F-250 4x4, 6.9l turbo diesel, 5 speed manual Previous oilburners: 1980 IH Scout, 1984 E-350, 1985 M-B 300D, 1979 M-B 300SD, 1983 M-B 300D Spark-free since 1999
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#4
07-26-2003, 05:34 PM
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thanks for the advice, ill try those, but i dont know what an alda is, are you talking about the line that runs from the turbo to the intake manifold?
id appreciate all the advice anyonne can offer
__________________
1991 300 D 2.5 Turbo, 220k also in the family: 1981 240 D 185k 1991 350 SD 185k 2006 S 500 2005 SLK 350
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#5
07-26-2003, 07:35 PM
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There should be a line running from the intake manifolt to a device on the firewall then continuing to a square-ish device set on the injection pump.
I've never looked under the hood of a 2.5 so these are generalizations. Sixto 95 S420 91 300SE 87 300SDL 83 300SD
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#6
07-31-2003, 02:39 PM
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ALDA
ive heard alot about adjusting the ALDA to make your engine run more smoothly and with more power. how is this done and can i do it on my '91?
__________________
1991 300 D 2.5 Turbo, 220k also in the family: 1981 240 D 185k 1991 350 SD 185k 2006 S 500 2005 SLK 350
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#7
10-16-2003, 04:54 PM
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i looked for the ALDA on my 602 but i couldnt find it and im not totally sure what it looks like. do i even have one? do all turbo diesels have one?
__________________
1991 300 D 2.5 Turbo, 220k also in the family: 1981 240 D 185k 1991 350 SD 185k 2006 S 500 2005 SLK 350
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