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  #1  
Old 07-26-2003, 05:12 PM
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Join Date: Oct 2002
Posts: 463
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  
Old 07-26-2003, 05:32 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 19,745
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  
Old 07-26-2003, 06:18 PM
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Certified diesel nut
 
Join Date: Mar 2002
Location: Pacifica (SF Bay Area), CA
Posts: 2,946
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  
Old 07-26-2003, 06:34 PM
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Join Date: Oct 2002
Posts: 463
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  
Old 07-26-2003, 08:35 PM
sixto's Avatar
smoke gets in your eyes
 
Join Date: Jun 2000
Location: SF Bay Area
Posts: 19,745
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  
Old 07-31-2003, 03:39 PM
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Join Date: Oct 2002
Posts: 463
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  
Old 10-16-2003, 05:54 PM
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Join Date: Oct 2002
Posts: 463
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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