1984 Mercedes Benz 500sel Engine Miss at low RPM

Tiny
ROBERTCG
  • MEMBER
  • 1984 MERCEDES BENZ 500SEL
  • V8
  • 2WD
  • AUTOMATIC
  • 251,000 MILES
After engine warms up engine misses badly at low (under 750-850) RPM. At speed car runs beautifully with good power and acceleration.

Mechanic tells me coil is putting very high voltage(?) Because plug wires and distributer cap/rotor causing too much resistance. I have had this car from 138,000 miles to now 251000 miles and have never changed plug wires.

Does this sound like an accurate diagnosis?
Friday, February 12th, 2010 AT 9:39 PM

1 Reply

Tiny
BUDDYCRAIGG
  • MECHANIC
  • 2,262 POSTS
It is possible, electrical items normally develop more resistance as they heat up.

And if you haven't changed the plug wire for that long, then you're due.

You might also want to replace any other tune up parts that haven't been changed in the last 50,000 miles.
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Saturday, February 13th, 2010 AT 2:20 AM

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