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  #1  
Old 08-15-2014, 02:58 PM
oldan
 
Join Date: Nov 2013
Posts: 20
sluggish 280 engine follow up

I posted this problem on 6/21 and got a suggestion of bad vacuum advance or vacuum leaks or bad cat converter.

Here is how i am circumventing the problem.

When the car hits 55mph (which is about all it can muster) I set the cruise control
and then lift up on the cruise control lever. The car responds and smartly speeds up to whatever speed I choose without downshifting . As long as the cruise is on the car has plenty of power.

Any thoughts on how this can be?

Thanks

Dan
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  #2  
Old 08-17-2014, 12:09 AM
Walrus's Avatar
Registered User
 
Join Date: Sep 2004
Location: NE Alabama
Posts: 551
Quote:
Originally Posted by oldan View Post
I posted this problem on 6/21 and got a suggestion of bad vacuum advance or vacuum leaks or bad cat converter.

Here is how i am circumventing the problem.

When the car hits 55mph (which is about all it can muster) I set the cruise control
and then lift up on the cruise control lever. The car responds and smartly speeds up to whatever speed I choose without downshifting . As long as the cruise is on the car has plenty of power.

Any thoughts on how this can be?

Thanks

Dan
Sounds strangely like a problem with your foot pedal throttle linkage...
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1988 560SL

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  #3  
Old 08-17-2014, 08:23 PM
oldan
 
Join Date: Nov 2013
Posts: 20
Yup it was the linkage

Thanks for your advise walrus

Found spring that fits into bracket on fire wall was flopping around due to lack of tension.

Did a temp fix with a washer which gets tension back into the linkage

Car is back to good performance

Will order parts from pelican tomorrow to correctly fix the problem

Cost $2

Thanks again

Dan
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