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Old 05-31-2005, 10:31 PM   #1 (permalink)
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Date registered: Apr 2005
Vehicle: 1995 S320
Location: Houston, Texas USA
Posts: 40
rough idling

95 s320, cleaned my engine with engine degreaser and water hose, now it's idling not smooth as before (miss firing) I washed it. I used a leaf blower to dry most of everything before starting engine. Also have an engine oil leak somewhere @ lower/front of engine but don't think it's the oil pan gasket, oil seems very fresh. Please help thanks ya'll.
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Old 06-02-2005, 05:53 PM   #2 (permalink)
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RE: rough idling

How many miles? I'd wager your harness or throttle slide got some moisture in it..

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Old 06-08-2005, 09:50 PM   #3 (permalink)
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Date registered: Apr 2005
Vehicle: 1995 S320
Location: Houston, Texas USA
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RE: rough idling

sorry took so long got tired jacking with the car, been working so can make money to fix mercedes, sad so sad.

It has 145k miles, all engine idled just fine prior to wash. Which wiring harness r u refering to?? Thanks.
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Old 06-09-2005, 07:56 AM   #4 (permalink)
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Date registered: Dec 2002
Vehicle: 1995 S420
Location: Florida
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RE: rough idling

Never, never, never, EVER wash your engine!!!!! [xx(][B)]
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Old 06-11-2005, 12:40 AM   #5 (permalink)
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Date registered: Apr 2005
Vehicle: 1995 S320
Location: Houston, Texas USA
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RE: rough idling

True, True, True, as least with an MB, guess I'll just clean the entire engine with a toothbrush..lol. I appreciate your advice, there should be a section on this site titled "Things you don't want to do with an MB", then we will all learn from others experience, which is truly valuable.
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Old 06-11-2005, 07:15 AM   #6 (permalink)
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Date registered: Dec 2002
Vehicle: 1995 S420
Location: Florida
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RE: rough idling

Here MAY BE a probable solution:
spray the engine electricals with ethanol to dissolve the water. If water has entered distributor caps and spark plug housings then you may have to open them out and dry them. I have also seen paint thinner being used for wiping electricals. Keep everyting open in sunlight and air it out in sunlight. Do NOT start engine for a day or two, the misfiring can damage engine cylinder heads and pistons due to random firing and excessive pressures at the wrong time, as the cylinders may be firing at the incorrect timing.
Above all, do so at your own risk. In a normal car this procedure would not be a problem, but I don't know how it would affect the weak wiring of a W140.
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Old 06-11-2005, 12:28 PM   #7 (permalink)
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RE: rough idling

Quote:
nccong - 6/11/2005 7:40 AM

True, True, True, as least with an MB, guess I'll just clean the entire engine with a toothbrush..lol. I appreciate your advice, there should be a section on this site titled "Things you don't want to do with an MB", then we will all learn from others experience, which is truly valuable.
Look in the knowlege base.. you will find lots of stuff ...you can use the search button at the top of the forum page..
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Old 06-19-2005, 11:09 PM   #8 (permalink)
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Date registered: Apr 2005
Vehicle: 1995 S320
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RE: rough idling

Thanks ya'll, yeah turns out water got by the spark plug cover and foaled everthing, I repaced the plugs and extensions and good now. Later.
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