Misfire on 5, tried parts. Sticky valve?
Super Moderator
Joined: Jan 2011
Posts: 16,322
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From: Savannah Georgia
re: Most of those golden oldies don't ever come to dealers
Yep, a water pump on a W124 will make you think that way.
For those interested, here is the misfire monitor method from the Bosch manual. Keep in mind that the ECU is juggling a lot of things at one time...
Yep, a water pump on a W124 will make you think that way.
For those interested, here is the misfire monitor method from the Bosch manual. Keep in mind that the ECU is juggling a lot of things at one time...
Last edited by Savannah Buzz; Jan 9, 2012 at 04:34 PM.
You very well could have a sticky valve caused by engine sludge then.
5w-30 is the wrong oil for these engines.
5w-40 or 15w-40 diesel oil only, anything else other than a true full synthetic and you will have problems.
Start with the oil change, the diesel oil will help clean up and engine sludge and free up a sticky valve.
5w-30 is the wrong oil for these engines.
5w-40 or 15w-40 diesel oil only, anything else other than a true full synthetic and you will have problems.
Start with the oil change, the diesel oil will help clean up and engine sludge and free up a sticky valve.
TReK
Joined: Dec 2009
Posts: 2,243
Likes: 10
From: Albany, NY
if it is intermittent, then do two things, add coolant dye and check for coolant in the oil or the spark plug and or cylinder. secondly, use some bg 44k and use it regularly. that might help cleaning the exhaust valves. the injection service can kinda work but it does mostly the intake valves. the exhaust valves are the problem child on those motors.
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73, 99, discovery, fluctuates, intermittent, intermittently, misfire, powerstroke, rover, rpm, sticking, sticky, trooper, valve, valves
