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  #1  
Old 04-12-2001, 03:20 AM
Snow bum
 
Join Date: Jan 2001
Location: Here and there . . .
Posts: 238
I may have a problem with my 300D. It is likely insignificant, but nevertheless I like my cars to be as close to perfect as possible.

My car experiences a loss of power while accelerating somewhere between 90 and 100 mph. I have not had the safe opportunity to do enough high speed driving to determine if it always happens at the same speed, but it seems like the speed at which this occurs varies.

Is it possible that I have a speed/rpm limiter that is acting up? Or could there be some other problem? I have not had this problem at any speed under 80 mph. If my memory serves me right, it may have happened once at 83 mph. Tonight it happened around 98 mph.

Any ideas? Or do I just need to drive slower?
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Ben

The MBs:
1976 300D (W115) - 330K and still going (sort of)
1991 300D 2.5 Turbo - Sold at 221K
1983 280SEL - Sold at 206K
1981 300SD - Sold at 232K
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  #2  
Old 04-12-2001, 08:14 AM
ymsin's Avatar
Driver, Mercedes-Benz
 
Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
I'm inclined to check the tuning. I had a similar problem when at certain high speed, i.e. 160 km/p, it refuses to go any further despite stepping all I could on the pedal.

A tuning job, and now it won't stop until its way past 200 km/h!

I *hope* thats your problem solved.

ps. I think I'm gonna be booked in the mail for doing 150 km/h (despite braking) when Swanee and I was away celebrating her birthday weekend. The copper just looked at me and nodded his head "You're on camera ... "

Idiots.
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... Kerry

126 tailed by a 203, 129 leading the pack.
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  #3  
Old 04-12-2001, 03:48 PM
MBenzNL's Avatar
MBenzNL
 
Join Date: Jan 2001
Location: the Netherlands
Posts: 1,417
ymsin,

I have told you before that you have to pay for your lack of intelligence , but it sounds like you are almost as stupid as I am... (I am anxiously waiting for one speeding ticket I collected last week after turning my head to see what all those (approx. 12) people were doing along the highway bending over the guide rail...after the flash I realized they had an excursion to see a radar trap at work...)

BTW: Ben drives a 250 Turbo diesel, so I think improper tuning does not cause his problem. Is it a high speed or a high rev problem?

greetingz,
__________________
1990 300SL-24
1993 C250D
with a minor 600+k kilometer
www.MBenzNL.com
(the Netherlands)
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  #4  
Old 04-12-2001, 09:26 PM
ymsin's Avatar
Driver, Mercedes-Benz
 
Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
*slap on my head*

Diesel don't tune, I don't learn.

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... Kerry

126 tailed by a 203, 129 leading the pack.
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  #5  
Old 04-13-2001, 01:16 AM
Snow bum
 
Join Date: Jan 2001
Location: Here and there . . .
Posts: 238
I think it is high speed, but it could be high rev. I have not experienced the behavior below 80 mph, although I have had the engine revved relatively high once or twice below that speed.
__________________
Ben

The MBs:
1976 300D (W115) - 330K and still going (sort of)
1991 300D 2.5 Turbo - Sold at 221K
1983 280SEL - Sold at 206K
1981 300SD - Sold at 232K
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  #6  
Old 04-13-2001, 01:31 AM
ymsin's Avatar
Driver, Mercedes-Benz
 
Join Date: Feb 2001
Location: Malaysia
Posts: 1,645
I recall having serviced our company diesel SUV last year. The problem with that SUV was the rev being unable to cross 3,500, and thus cruising at the maximum was limited to 90 km/h!

They changed the fuel regulator and a few other components and it was all fine after that.

Don't know if it works the same for a Benz.
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... Kerry

126 tailed by a 203, 129 leading the pack.
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  #7  
Old 04-15-2001, 12:31 PM
MBenzNL's Avatar
MBenzNL
 
Join Date: Jan 2001
Location: the Netherlands
Posts: 1,417
That was exactly what I was thinking. If the lack of power is rev-related, it can be caused by the fuel-filters...
If the lack of power is speed related, it will become more difficult to find a cause.

Ben, I don't know if you got anything about the history of the car, but I think that I would start with renewing the fuel filters. The lack of power could be caused by a turbo problem as well, but then again: it has to be rev-related.

greetingz,
__________________
1990 300SL-24
1993 C250D
with a minor 600+k kilometer
www.MBenzNL.com
(the Netherlands)
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