Parts Catalog Accessories Catalog Tech Info Tech Forums
  Search our site:    
 Cart  | Project List | Order Status | Help    

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 12-03-2000, 05:29 PM
Registered User
Join Date: Sep 1999
Location: montreal,quebec,canada
Posts: 53
i realise that this is for mercedes only but a friend of mine has a volvo 1986 760GLE and the engine has become very rough and the exhaust gets red hot just after the exhaust manifold.
there is no turbo.
could it be a fuel problem?
or the catylictic converter??
there is no black smoke or evidence of an over rich fuel mixture....unless the catalyctic converter is working very efficiently??????
Reply With Quote
Old 12-03-2000, 08:12 PM
Registered User
Join Date: Jan 2000
Location: New Bedford, MA USA
Posts: 1,583
Whoa, the exhaust is obstructed. I think the Volvo might have a cat or precat in the downpipe. If so that's the problem. I can't imagine any other situation producing a visible glow in the exhaust system..
Jeff Lawrence
1989 300e
2000 Dodge Grand Caravan SE
No matter what you fix, there will always be something else to fix..
"Warranty" is just another way of postponing the inevitable.
Reply With Quote
Old 12-03-2000, 11:51 PM
MikeTangas's Avatar
Senior Member
Join Date: Apr 2000
Location: So. Cal
Posts: 4,430
That does sound like a plugged Cat. If the pipes are glowing that bright, I'd be worried about spontaneous combustion in the surrounding areas, to include combustibles in the passenger compartment.
Mike Tangas
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72

'02 CLK320 Cabriolet - wifey's mid-life crisis

2012 VW Jetta Sportwagon least its a diesel

Non illegitemae carborundum.
Reply With Quote
Old 12-04-2000, 11:50 PM
Registered User
Join Date: Jun 1999
Location: Los Angeles, Calif, USA
Posts: 521
In my opinion, the raw fuel was burning inside the manifold. The air pump is injecting fresh air into that part of the exhaust pipe to burn the raw fuel in order to clean the smog. The car may be running a little too rich or too lean.


[Edited by be459 on 12-04-2000 at 11:57 PM]
Reply With Quote
Old 12-05-2000, 09:53 AM
Q Q is offline
Registered User
Join Date: Aug 2000
Posts: 839
That is a lean condition.
Reply With Quote
Old 12-05-2000, 12:35 PM
Registered User
Join Date: May 1999
Location: Berkeley, CA
Posts: 199
I once experienced exactly the same condition on my 16V. The engine started running very rough. I lost power. I thought the engine was gone. I lifted to hood only to see a my pre-cats glowing red hot. The problem? One cylinder was not firing due to a fouled spark plug. I suppose this approximates the lean condition with extra fuel being burned near/in the pre-cats. Replacement sparkplug cured all symptoms.

'87 2.3-16v
'92 500E
Reply With Quote
Old 12-05-2000, 06:15 PM
Posts: n/a
Get it fixed asap. This *exact* problem occurred with a friend's Volvo and two hours after we were looking at it and scratching our heads the car caught fire and burned completely on the way home. He got out ok but had a pretty wild story to tell about flames erupting from under the hood (and all the way out the back) at 60mph. As nothing but a block and some twisted metal was left we never did figure out what was wrong but the posts above appear to make sense.
By the way - it was a 760GLe and was somewhere between 84-88...
Reply With Quote
Old 12-05-2000, 10:22 PM
Registered User
Join Date: Sep 1999
Location: montreal,quebec,canada
Posts: 53
thanks to all for your input.
i guess we will start with the spark plugs
Reply With Quote


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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Exhaust Manifold Help (450 SEL) rix116 Vintage Mercedes 1 03-27-2004 12:20 AM
Exhaust Manifold Studs and Bolts Maddog Performance Paddock 12 01-20-2003 11:21 PM
WTB left exhaust manifold for 72 280 SE 4.5 W108 psfred Mercedes Used Parts For Sale & Wanted 1 09-27-2002 10:43 PM
Exhaust manifold leak Ben300SD Tech Help 3 02-14-2002 02:32 PM
190 Exhaust Manifold mwfameli Tech Help 1 05-06-2000 03:41 PM

All times are GMT -4. The time now is 05:22 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2016, 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