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-Benz Forum > Mercedes-Benz Tech Information and Support > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-06-2011, 10:21 PM
Registered User
 
Join Date: Jul 2011
Posts: 23
1991 500SL, converter almost caught on FIRE!!!!

My fathers W129 500SL recently had some ASR issues. I am somewhat handy and replaced the Electronic Gas Actuator at the front of the engine, this took care of the ASR light on the dash but it still doesn't run as good as I feel it should, still feels like we are having an ASR issue. My question is the last time my father drove the car when he came back it was running pretty bad, but I noticed that the car seemed very hot, I looked under the car and the cat. converter was cherry red, had to be very close to catching fire. Is there a specific part that this clues anyone to what my problem may be on the particular car? My conclusion is some part has failed and is dumping way to much fuel into the system? Thanks

Reply With Quote
  #2  
Old 07-07-2011, 08:19 AM
Moderator
 
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
If fuel is not burned completely in the combustion process, raw fuel can cause the catalytic converter to get RED hot. And that will ruin the converter.

Miss fires are the most common issues: spark plugs, dist caps, rotors, & SP wires are the most common causes.
__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator
Reply With Quote
  #3  
Old 07-07-2011, 08:29 AM
compu_85's Avatar
Waiting for his Model 3..
 
Join Date: May 2008
Location: Springfield VA
Posts: 5,174
I'd be worried the converter melted down and is now plugged. That will cause a big loss of power.

-J
__________________
1991 350SDL. 230,000 miles (new motor @ 150,000).

2013 Fiat 500E. 20,000 miles, 80 miles at a time.
2012 Passat TDI. 95,000 miles. More space, power, and fuel economy than the Benz
2004 Touareg V10 TDI. 150,000 miles. One of 450.
1999 Jetta TDI. 310,000 miles.
1992 Jetta ECOdiesel. 156,000 miles. 1 of 48. Sold.
1991 Jetta ECOdiesel. 430,000 miles. 1 of 700. Sold to VeeDubTDI, totaled in front of our house
Reply With Quote
  #4  
Old 07-18-2011, 10:43 PM
Registered User
 
Join Date: Jul 2011
Posts: 23
Thanks for the advise, I will check the plugs and wires, I replaced the distributor caps and rotors not long ago. I may also try dropping the exhaust and seeing if that helps the problem since the converters could now be bad.
Reply With Quote
  #5  
Old 07-19-2011, 12:39 PM
Senior Member
 
Join Date: Nov 2002
Posts: 736
don't drop the exhaust, just pull the o2 sensors. might be easier. good luck, chuck.

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




All times are GMT -4. The time now is 11:37 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page