Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Vintage Mercedes

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-12-2000, 06:42 AM
kevinjh
Guest
 
Posts: n/a
Hi Folks,

I've got a 5 spd 280sl in great shape. Only problem is the occasional stumble when under acceleration. It feels as though there's a sudden loss of power after I step on the gas. When this occurs I would ease off the gas and then step on it again and then it takes off fine. This normally happens on the lower gears. Any suggestions on what I can do?

BTW. This happened even after I changed the Spark Plugs, Oil, Belts, Gear Oil and all the rest.

Thanks,

Kevin
Reply With Quote
  #2  
Old 05-12-2000, 09:57 AM
Jim Villers's Avatar
Registered User
 
Join Date: Jan 2000
Location: Virginia Beach, VA
Posts: 490
A question and a thought .. does it only happen at low RPM's? Thoughts .. the fuel injection system should rule out a fuel problem and that leaves ignition. My 230SL had a faulty vacuum advance that caused a feeling that it just "wasn't running right". When setting the timming with a timming light, the advance moved around with increasing RMP's vice a smooth advance. With the cost of the vacuum unit at $75, I bought a rebuilt distributer for $125. It did wonders. I found the source in Hemmings and will pass it on if you desire.

The 5-speed is perfect for this car. I drive mine every day.

Jim Villers
190SL, 230SL 5-speed
Reply With Quote
  #3  
Old 05-14-2000, 11:18 PM
kevinjh
Guest
 
Posts: n/a
Hi Jim,

It occurs at the low to slightly below the mid-range level. I had initially thought it was due to the fuel so I used higher fuel with a higher octane rating but that did not seem to help. What other components of the ignition do you think could cause this? Can you pass me any info you have on this?

How's the Air Conditioner you installed?

Thanks,

Kevin
Reply With Quote
  #4  
Old 05-15-2000, 02:01 PM
Jim Villers's Avatar
Registered User
 
Join Date: Jan 2000
Location: Virginia Beach, VA
Posts: 490
Kevin ... I am still mulling the A/C system. I have heard only "cons" on it. The issue seems to be the power and torque of the engine and whether I want to put up with the power transfered to the A/C unit.

On your problem. I again doubt that it is fuel. You can easily test this hypothis by richening your fuel mixture by taking about two twists to lengthen the control rod to your injector pump. If this changes the sympthoms, then go the the manual and reset your linkages, a four or five step process.

My thoughts still revolve around an incorrect spark advance. To test this hypothis, advance your timming about 5/10 degrees and take it for a test drive. If this "fixes" the midrange problem, then set the timmng at 3000 RPM whith the vacuum advance disconnected and pluged, it should be 30 degrees BDC (I think, check the manual). Then check the advance curve with the one in the manual. Finally, reconnect the vacuum advance and adjust the idle.

Setting the timming at 3000 RPM removes centrifugal advance at low RPM problems. Also many people forget to remove and plug the vacuum advance which effects idle speed and advance.

When it is correct, it should run like a dream.

jim Villers
Reply With Quote
  #5  
Old 05-15-2000, 11:52 PM
kevinjh
Guest
 
Posts: n/a
Thanks Jim,

I'll try this out over the weekend.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
M-100 Group's Lode Star Fest, Paul Bracq, W113 Pagoda SL Group rmasteller Events & Gatherings 3 05-03-2004 08:57 PM
WTB R107 280SL parts mike690003 Mercedes Used Parts For Sale & Wanted 2 04-26-2004 01:10 PM
W113 Tech Session rmasteller Events & Gatherings 0 06-03-2003 03:44 PM
Sold the 280SL and the 300D Aaron Vintage Mercedes 4 09-28-2002 06:42 PM
FS: 30 mm Anti-Sway Bar & Frankfurt Radio (W113) M5Yates SL Forum 0 02-14-2002 11:31 AM



All times are GMT -4. The time now is 03:48 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2011 Pelican Parts - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page