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» Engine Problems Due to Distributor Cap and Rotor, Bad Ignition Wires, or Valve Cover Gasket Leaks
Mercedes-Benz 420SEL
Report: Engine Problems Due to Distributor Cap and Rotor, Bad Ignition Wires, or Valve Cover Gasket Leaks
Mercedes-Benz 420SEL Problem
Model Years Affected: 1990, 1991
Verified
A rough running motor or lack of power can be caused by a failed distributor cap or rotor, ignition wires (or their resistors), or valve cover gasket leaks. If the valve cover gasket leaks, oil can pool where the ignition wire resistor connects to the spark plug. The resistor can fail and the spark plug may not fire because of a short circuit through the oil.
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...ing like a race horse. After several trial and errors, I found out it was probably the relay (ABS light was on) and replaced it. Afterward, I starting hearing a slight "ticking" like a lifter or va...
Q&A > Mercedes-Benz > 1990 Mercedes-Benz 420SEL
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I have 1986 Mercedes-Benz.The rear brakes need to be replaced.I have already removed brake cali...
Q&A > Mercedes-Benz > 1990 Mercedes-Benz 420SEL
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My 1991 420 sel will only start when i shift to neutral...mechanics here cant figure it out..??...
Q&A > Mercedes-Benz > 1991 Mercedes-Benz 420SEL
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I recently sold my 420SEL to my sister who had a mechanic replace the brakes. Now the ABS ligh...
Q&A > Mercedes-Benz > 1990 Mercedes-Benz 420SEL
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Car has no water in engine, no puddles, but can see stream from under air breather. Doesn't go...
Q&A > Mercedes-Benz > 1991 Mercedes-Benz 420SEL