300e Oil pressure/Fuel Economy help
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Junior Member
Joined: Aug 2013
Posts: 1
300e Oil pressure/Fuel Economy help
1987 300e (3.0l)
Oil Pressure reads 3 (max) as soon as the revs reach about 1000.
A lot of oil making it through breather on valve cover and into airbox.
Fuel economy is... rough.
Some spark plugs have a lot of carbon build up, basically fouled.
Idle is very low, doesn't stall, but close. And rough.
Not smokey out the pipes or off engine. No leaks anywhere. Temperature stable in the middle. However the engine always seems hot (that might just be a 300e thing though)
trade karma for advice
Oil Pressure reads 3 (max) as soon as the revs reach about 1000.
A lot of oil making it through breather on valve cover and into airbox.
Fuel economy is... rough.
Some spark plugs have a lot of carbon build up, basically fouled.
Idle is very low, doesn't stall, but close. And rough.
Not smokey out the pipes or off engine. No leaks anywhere. Temperature stable in the middle. However the engine always seems hot (that might just be a 300e thing though)
trade karma for advice
Former Sponsor
Joined: Feb 2013
Posts: 52
Spark Plug Analysis
When was the last time a complete tuneup was performed?
Have you tried performing a compression test?
When was the last time a complete tuneup was performed?
Have you tried performing a compression test?
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