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  #1  
Old 05-21-2004, 10:39 AM
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Join Date: May 2004
Location: YARDLEY PA
Posts: 12
HELP turbo diesel hesitation

hello, I would like to thank everyone for the help have recieved reading the previous posts. I am 24 and have had 2 benz diesels and I think I will drive them forever. My current car has 145k and is an 86 sdl. I have changed fuel filters, replaced all of the vacuum lines and connectors I can see, installed a new mann air filter, and ran a couple of tanks of power servive cetane booster through it. The car has been running better as it used to sit the longer I drive it. But there is still one problem and I was wondering if you could help. The turbo is boosting but at around 3000-3500 rpm the car has a quick and short loss of boost. This only happens as I am accelerating to about 60mph and no other time. Since the filter changes and new fluids it seems to be getting better, less offensive, but I would like to make irt go away myself. Thanks in advance.
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86 300sdl 145k
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  #2  
Old 05-21-2004, 10:58 AM
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Join Date: Apr 2000
Location: Oakville, Ontario, Canada
Posts: 421
Sounds like the car was sitting for a while.. these cars need to be driven!

Before you try anything else, give it an italian tuneup and see if the problem goes away.. many problems on my '86 300SDL disappeared after a few good runs.

Search the forum for "italian tuneup" if you don't know what I mean.. there are many threads on what it is and how to do one.

Neal
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  #3  
Old 05-21-2004, 12:55 PM
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Join Date: Jun 2003
Location: SF Bay Area
Posts: 599
Follow the semi-clear vacuum line from the intake manifold to an electric valve. Once there, remove the two vacuum lines from the valve then connect them together.

Test dirve to determine performance improvement, (NO) or (YES)
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  #4  
Old 05-23-2004, 12:23 AM
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Join Date: May 2004
Location: YARDLEY PA
Posts: 12
I have been running the car for an hour a day at 80mph for about 5 months to and from work, she runs strong but the italian tuneup has been fully expressed, MrCjames, what is the electric switch I would be bypassing, the boost protection? If it fixes the problem should I leave the hoses together or purchase a new switch. Thanks I will check it out first thing tomorrow.
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86 300sdl 145k
85 300sd 270k
86 saab 9000t
85 saab 900t RIP
85 jetta gli 16v RIP
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