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

LinkBack Thread Tools Display Modes
Old 12-10-2007, 08:00 PM
1991 420 SEL
Join Date: Dec 2007
Location: Everett, WA
Posts: 4
420 SEL 1991 207K miles

I just had my spark plugs changed to NGK Iridiums. The old BOSCH ones were wet and black- running too rich? Where is the adjustment for this?

Reply With Quote
Old 12-10-2007, 09:00 PM
1991 420 SEL
Join Date: Dec 2007
Location: Everett, WA
Posts: 4
420 Sel Running Too Rich

I just had the spark plugs changed yesterday- 4 on the left bank were black and one was even wet and obviously not firing resulting in the rough idle and missing upn hard acceleration- right bank was better but still had black deposits and were not clean after less then 6K miles on the plugs-

How can I adjust this to a leaner mixture????

Thank you,
Reply With Quote
Old 12-11-2007, 08:59 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Next to the fuel distributor. a 2" tower that MAY be plugged.

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


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 12:29 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, 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