Rough idle
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RE: Rough idle - 12/1/2006 5:14:11 AM
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snanceki
Posts: 2388
Joined: 12/11/2004
Status: offline
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Exhaust leak could be linked to rough idle.
Correct this before spending time on the long list of other possibilites.
Stuart
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RE: Rough idle - 12/1/2006 3:01:34 PM
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mbz300sdl
Posts: 2467
Joined: 10/26/2004
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How about plugs? Wires? Adjust the idle also it might make a difference.
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RE: Rough idle - 12/1/2006 3:50:38 PM
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aermotor
Posts: 14
Joined: 9/18/2006
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There is a vaccuum connector that goes to a small vaccuum capsule that comes off the intake, below the air cleaner, more toward the back on the passenger side. On my 560 engine that sometimes slips off - needs a new rubber hose connector between engine vaccuum port and capsule, I guess. Anyway, that always leads to just the rough idle you describe, with no stall. Just make sure all vaccuum hoses and connectors are intact.
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RE: Rough idle - 12/1/2006 4:17:34 PM
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BlackWolf
Posts: 1059
Joined: 9/6/2005
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Plugs and wires have been replaced around the same time the water pump was replaced, April 2006. Just as a measure and prep for shipping to the German autobahn and since I never knew the last time they was replaced. The mechanic saw nothing unusual about the old plugs/wires. Thanks for the info. I will check this stuff tomorrow and it help me pin point things and probably saved me alot of time.
I'm sure I have an exhaust leak so I will definately check that out and pinpoint it so it can be fixed ASAP, because the noise is a little annoying too. Then check then intake and vacuum hoses and connectors and go from there. I'm not worry about too much about the extent of repairs. Hey this is Germany and parts from the dealership is usually way cheaper than even buying them online wholesale price, then I found a couple of good mechanics that see BMWs, Mercedes, Audis all the time and been working on them for years but don't charge too much of an arm and a leg for the work like in the states.
The goal is that by the time me and this Mercedes return to the states, it would be in total perfect or as close to perfect condition as possible with a couple of upgrades.
Even being in Germany where I thought I would blend in, this car still stands out. I get compliments from Americans and Germans alike. One German told me that it's rare to see a W126 V8, let alone a 5.6. Then even rarer is the long wheel base.
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1989 Mercedes 560SEL grey
1987 BMW 735i grey
1997 Mercury Cougar 30th Anniversary drk t.red
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RE: Rough idle - 12/18/2006 12:13:38 AM
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garymand
Posts: 10
Joined: 12/16/2006
Status: offline
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They have to pay a very high tax on motors that big. And as you have found by now, the petrol is sold by the liter at a higher price than our gallons. I'm sure you found a local to fix it by now, but is the idle rpm and what hapens to it when you pull the vacuum?
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