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rough idle 1985 190D
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Posted 5/11/2012 9:59 AM
rockjunkie
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Date registered: Nov 2006
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rough idle 1985 190D

I've got an '85 190D with just over 200k. Recently, when driving at highway speeds for extended periods (1+ hour at 65mph), it would start to idle very roughly (as though it was running on 3 out of the 4 cylinders) as soon as I got off the highway and pulled up to a stop sign. As I've been putting about 230 miles week on it I'd really like to get this sorted out. It's not burning oil, is still getting about 34mpg and otherwise runs ok. It's also got an issue with the oil gauge, which pegs at 3 as soon as the vehicle is started and doesn't move; oil sender? Would really appreciate any suggestions as I'm driving this from Phoenix to Tucson without a/c and I really don't want to be sitting by the side of the road when it's 115 degrees waiting two hours for a tow truck. Thanks.
#203583
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Posted 6/16/2012 10:57 AM
Ed Mclass
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Date registered: Apr 2006
Location: Nashville, Tennessee
Vehicle(s): 1958 180a, 2010 GLK, 2000 G 500, 2005 SLK 350
Posts: 1215
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Re: rough idle 1985 190D

Your injection pump is about to fail. Fuel is not reaching your injectors. This is a problem with diesel engines with your mileage.
#204604 - in reply to #203583
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