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Old 01-14-2003, 02:14 PM
Registered User
Join Date: Oct 2002
Location: Vanersborg, Sweden
Posts: 99
W126, lean right bank and rich left - Help me!!

Hello Mercedes frinds,

I changed the spark plugs this weekend and noted that all the plugs on the right cylinder bank were white and all the plugs on the left were black.

I did get a reply on another post that I did that it might be the idle air circuit on one sid that was blocked.

Well, I´m clueless on how the find it and check it out.

Can You help me a bit??

Many thanks in advance,

Mikael Westerberg
1984 500 SEL
Vanersborg, Sweden
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Old 01-15-2003, 03:00 PM
Registered User
Join Date: Oct 2002
Location: Vanersborg, Sweden
Posts: 99
Anyone out there that can help?

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Old 01-17-2003, 10:52 AM
Registered User
Join Date: Oct 2002
Location: Vanersborg, Sweden
Posts: 99
OK, I need to give it another try.

Hello again,

This was obviously adiffucult questions since there´s no reply. Help me out.

Best regards,

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Old 01-18-2003, 12:04 AM
Registered User
Join Date: Oct 2002
Location: Colorado Springs
Posts: 481

I will give it a try but no garantees. The fuel comes in via the injector from the distributor. I would imagine if this is caused by the fuel system all or one rather than one side. However, the air side of the system souds like the culprit. You have a rubber hose that has 4 tubes that go directly to each injector this rubber can get very hard and crack. That is the first place I would check. It is a cheap fix (@$20 a side) if the rubber is hard I would replace it anyway.
hope this helps
Martin Ingram
Colorado Springs
2005 320 CDI
2006.5 VW Jetta TDI
1991 560SEL (179000 Sold)
1972 280SEL 4.5 ('The Lead Sled' 320000 miles when sold.)
1972 220D (225000 when sold)
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