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#1
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My Mercedes Benz 2003 C-240 with 103K runs good but when engine gets hot it start to have a rough idle. It behave similar to a misfiring engine.
It is very noticeable when stooping at traffic light. Please give any idea in where in the engine the problem can be. Thanks
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Nyck - TX - USA |
#2
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Ignition, fuel, or air/vacuum. Start by narrowing the problem down by ruling out components in those 3 categories.
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![]() 1990 190E 3.0L |
#3
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Maybe your Crank Position Sensor
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1986 300E (3/2002) Rear ended and totaled (10/2009) 2000 Xterra (5/2000) 1992 400E (11/2009) -Sold 1986 300E (12/2009) - Sold 2004 E500 Wagon (6/2013) - Sold ![]() |
#4
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Assuming all maintenance items are up-to-date and your engine mounts are good, ignition wires are a very common cause of rough idle/misfire.
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#5
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Quote:
If your engine mounts haven't been replaced and you only notice this at idle in gear (it's fine in park or neutral), then you need to first replace the engine mounts. Good luck. |
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