S-Class (W126) 1979-1991: 300 SE, 300 SEL, 380 SE, 380 SEL, 420 SEL, 500 SEL, 560 SEL, 360 SEC, 500 SEC, 580 SEC, 300 SD TURBODIESEL, 300 SDL TURBO, 350 SD TURBO, 350 SDL TURBO

Acceleration problem with the 420 SEL...

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 11-05-2004, 11:45 PM
  #1  
Newbie
Thread Starter
 
MikeWash's Avatar
 
Join Date: Nov 2004
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Acceleration problem with the 420 SEL...

In the last two weeks there has been a problem with accelrating above 50mph. Today I had a hard time starting the vehicle. After starting, the car wanted to die after acceleration at any speed. Any ideas as to what might be wrong ?
Old 11-05-2004, 11:57 PM
  #2  
Newbie
Thread Starter
 
MikeWash's Avatar
 
Join Date: Nov 2004
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Almost forgot...

It's an '87 420 SEL.
Old 11-06-2004, 04:22 AM
  #3  
MBWorld Fanatic!
 
dtkw's Avatar
 
Join Date: Jun 2003
Location: Indiana
Posts: 2,081
Received 0 Likes on 0 Posts
1986 560SEL, 97 BMW 740iL
Fuel filter dirty? Fuel line? Injector issue? spark plugs? check them if I were you.
Old 11-06-2004, 12:58 PM
  #4  
Newbie
Thread Starter
 
MikeWash's Avatar
 
Join Date: Nov 2004
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Another thing

It has to sit for at least 15min after running to start up again.
Old 11-07-2004, 11:15 AM
  #5  
Member
 
m117968's Avatar
 
Join Date: Oct 2004
Location: Atlanta, GA
Posts: 90
Likes: 0
Received 0 Likes on 0 Posts
96 S600 Euro, 91 560 SEC, 88 300TE, 87 560SEL, 86 560SL, 80 280SE, 64 Austin Healey 3000MIII
Sounds as though you are having a major fuel delivery issue. I would start w/ the fuel filter. If possible, take your car to a shop that can check your fuel pressure at the fuel distributor. I had a 420 in my shop w/ a similar problem (although not as bad..) and it turned out to be two fold, a bad fuel pressure accumulator and a tired fuel distributor.

How many miles on your 420?

Jonathan
Old 11-10-2004, 11:29 PM
  #6  
Senior Member
 
lars's Avatar
 
Join Date: Aug 2002
Location: Canada
Posts: 490
Likes: 0
Received 1 Like on 1 Post
05 CLK 500 cab
Fuel pump relay?
Old 11-12-2004, 06:24 PM
  #7  
Member
 
m117968's Avatar
 
Join Date: Oct 2004
Location: Atlanta, GA
Posts: 90
Likes: 0
Received 0 Likes on 0 Posts
96 S600 Euro, 91 560 SEC, 88 300TE, 87 560SEL, 86 560SL, 80 280SE, 64 Austin Healey 3000MIII
the FPR generally is a hit or miss deal..either it works or it doesn't..

Jonathan

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Acceleration problem with the 420 SEL...



All times are GMT -4. The time now is 10:11 PM.