Notices
Tech Talk Anything technically related to your vehicle should be posted here. If you're looking to have work done, try one of the Regional Forums.

1984 Benz 380SL won't start...

Thread Tools
 
Old 08-02-2009, 06:13 AM
  #11  
corona connessuer
 
CHAHONDA's Avatar
 
Join Date: Nov 2002
Location: GUAM
Posts: 3,425
Likes: 0
Received 0 Likes on 0 Posts
CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA
Default Re: 1984 Benz 380SL won't start...

how long has the car been sitting? sounds like you have a bad fuel pump/pumps. seen it plenty of times on benzs that i have bought/worked on
CHAHONDA is offline  
Old 08-02-2009, 06:15 AM
  #12  
corona connessuer
 
CHAHONDA's Avatar
 
Join Date: Nov 2002
Location: GUAM
Posts: 3,425
Likes: 0
Received 0 Likes on 0 Posts
CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA
Default Re: 1984 Benz 380SL won't start...

where in chesapeake are you located?
CHAHONDA is offline  
Old 08-02-2009, 06:15 AM
  #13  
ATGATT
 
marlinspike's Avatar
 
Join Date: Nov 2008
Location: Wangan
Posts: 10,477
Likes: 0
Received 0 Likes on 0 Posts
marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike
Default Re: 1984 Benz 380SL won't start...

Originally Posted by CHAHONDA
how long has the car been sitting? sounds like you have a bad fuel pump/pumps. seen it plenty of times on benzs that i have bought/worked on
Eh, the 380 is a 1-pump car. I've only heard of a pre-1986 107/126 having the fuel pump go bad once. The fuel pump relay is much more common, easier to diagnose, and cheaper to fix, so fingers crossed....
marlinspike is offline  
Old 08-02-2009, 06:23 AM
  #14  
Headlights/Floormats
Thread Starter
 
Thestearninator's Avatar
 
Join Date: Jan 2006
Location: Chesapeake, Virginia
Posts: 101
Likes: 0
Received 0 Likes on 0 Posts
Thestearninator has disabled reputation
Default Re: 1984 Benz 380SL won't start...

Okay... I pulled the liner of the glove compartment out. I see what I believe is the relay, but it has no text printed on the unit. I guess I'll pull it out to see if it's the relay...
Thestearninator is offline  
Old 08-02-2009, 06:24 AM
  #15  
Headlights/Floormats
Thread Starter
 
Thestearninator's Avatar
 
Join Date: Jan 2006
Location: Chesapeake, Virginia
Posts: 101
Likes: 0
Received 0 Likes on 0 Posts
Thestearninator has disabled reputation
Default Re: 1984 Benz 380SL won't start...

I'm located in Western Branch, by the way...

The car has been sitting for over a year...
Thestearninator is offline  
Old 08-02-2009, 06:25 AM
  #16  
ATGATT
 
marlinspike's Avatar
 
Join Date: Nov 2008
Location: Wangan
Posts: 10,477
Likes: 0
Received 0 Likes on 0 Posts
marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike
Default Re: 1984 Benz 380SL won't start...

Originally Posted by Thestearninator
Okay... I pulled the liner of the glove compartment out. I see what I believe is the relay, but it has no text printed on the unit. I guess I'll pull it out to see if it's the relay...
Might be an aftermarket one that's already in there. There must be something written on it, right? Any identifying marks you see, tell me. Or, just take a picture and I'll run out to my car and compare.
marlinspike is offline  
Old 08-02-2009, 06:28 AM
  #17  
ATGATT
 
marlinspike's Avatar
 
Join Date: Nov 2008
Location: Wangan
Posts: 10,477
Likes: 0
Received 0 Likes on 0 Posts
marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike
Default Re: 1984 Benz 380SL won't start...

Originally Posted by Thestearninator
I'm located in Western Branch, by the way...

The car has been sitting for over a year...
Oh, you're in the close part of Chesapeake...if we can't get it fixed over the internet, I'll just throw my tools in my trunk and come on down. If it's a problem a 380 can have, I've fixed it (my dad had bought my car new in 1985 and it only got this engine a little over a year ago, I took over the maintenance and repairs when I was 12).

Last edited by marlinspike; 08-02-2009 at 06:30 AM.
marlinspike is offline  
Old 08-02-2009, 06:40 AM
  #18  
Headlights/Floormats
Thread Starter
 
Thestearninator's Avatar
 
Join Date: Jan 2006
Location: Chesapeake, Virginia
Posts: 101
Likes: 0
Received 0 Likes on 0 Posts
Thestearninator has disabled reputation
Default Re: 1984 Benz 380SL won't start...

So, I jumped the relay and it did not start. The relay clicks when you turn the key the accessory mode.

Check the fuel pump w/ a jump?

The relay appears to be an OEM one, as it has the Benz insignia along w/ the other pre-described text (5500, etc.).

Last edited by Thestearninator; 08-02-2009 at 06:42 AM.
Thestearninator is offline  
Old 08-02-2009, 06:46 AM
  #19  
ATGATT
 
marlinspike's Avatar
 
Join Date: Nov 2008
Location: Wangan
Posts: 10,477
Likes: 0
Received 0 Likes on 0 Posts
marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike marlinspike
Default Re: 1984 Benz 380SL won't start...

Originally Posted by Thestearninator
So, I jumped the relay and it did not start. The relay clicks when you turn the key the accessory mode.

Check the fuel pump w/ a jump?
If even after jumping the fuel pump relay you don't hear the fuel pump pressurizing when you have the key in the start position. Check the voltage at the fuel pump, it should be a minimum of 11.5V with the relay jumped and the key at start. If it's not, you've got some other problem. If it is 11.5V but still not doing anything, it's a bad pump.

You can also try hitting the fuel pump with a hammer while someone cranks the car (on the post-1986 126/107s that I've seen with failed pumps this will get them going).
marlinspike is offline  
Old 08-02-2009, 06:48 AM
  #20  
corona connessuer
 
CHAHONDA's Avatar
 
Join Date: Nov 2002
Location: GUAM
Posts: 3,425
Likes: 0
Received 0 Likes on 0 Posts
CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA CHAHONDA
Default Re: 1984 Benz 380SL won't start...

i live in churchland. i can come take a look at it if you like.
CHAHONDA is offline  


Quick Reply: 1984 Benz 380SL won't start...



All times are GMT -8. The time now is 12:15 AM.