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380Sl 18 1983 Power issue

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Old 06-19-2009, 02:45 PM
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380 SL 1983
380Sl 18 1983 Power issue

My 83' 380 SL has lost mucho power. Once it shift through the gear to high gear it is a total dog, hardly makes it up hills. I have changed fuel pump and filter last year.

Not sure where to start on this one.

Any help is greatly appreciated.
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Old 06-21-2009, 04:55 PM
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91 300sel,97 S500, 95 525i
Check the alternator output. make sure its charging. make sure battery connections are clean and tight, also make sure overvoltage protection relay is ok. (above fuse box, pink anodized relay). Could also have mechanical issues. ie timing chain and rails.
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Old 06-21-2009, 08:50 PM
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380 SL 1983
Thanks for the reply. I am not sure how the battery and alternator would be tied to loss of power. Can you explain?

New double timing chain already installed.

I am also leaning toward my transmission also as it does not want to shift down when I step on it.
Any help is appreciated,

Thanks,
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Old 06-22-2009, 12:57 PM
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1991 560SEC Teal 1989 420SEL Ice Blue 1984 500SEC White
See if the carpet is jammed under the pedal.You should be able to floor it and get the kick down switch to engage.
Bruce
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Old 06-22-2009, 03:10 PM
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380 SL 1983
Thanks,
It does kick down if I step all the way on it so the switch does kick it. The problem is occuring before step all the way down. If I give it gas , say most of the way down it does not gain any power. It is very sluggish.
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Old 06-22-2009, 05:37 PM
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1991 560SEC Teal 1989 420SEL Ice Blue 1984 500SEC White
Originally Posted by jkoch View Post
Thanks,
It does kick down if I step all the way on it so the switch does kick it. The problem is occuring before step all the way down. If I give it gas , say most of the way down it does not gain any power. It is very sluggish.
It is a 380 and really not the fastest car. R u sure u r not expecting too much from the car?
Have you experienced other 380's?
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Old 06-28-2009, 08:46 PM
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91 300sel,97 S500, 95 525i
totaly agree with the last guy!! when was the last time this vehcile had maint? May have one of the fuel pumps going down. But simple check is the voltage output of the alternator. has alot to do with the power output and to check it does not require trial fitting any parts. to check the fuel pressure is a little more difficult.
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