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#1
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Can not pass emissions
Its a 1987 420 SEL and the only thing that it did not pass emission on
HC (PPM) Cruise Limit 150 Cruise Emissions 209 What do I need to do to fix this. I did change spark plugs. Any help can be helpfull. Rob C Seattle |
#2
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87 420sel
what kind of test do you have to pass in seattle?how is the mpg on your car? when was the oil last changed?when were the plugs last replaced?how old is the o2 sensor?
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
#3
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Only 1000 Miles on the Oil change. O2 Sensor is 1 year old. Spark plugs are brand new.
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#4
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emmissions
do i see that this is just a two speed idle test without the rear wheels being on a dyno?
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
#5
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#6
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emmissions
ok,at idle we have very low co and at 2500 the co jumps to .41.this would normally mean that the o2 sensor was not controlling the mixture.you said new o2 sensor so perhaps over voltage protection relay not working properly.i asked you about mpg and this is important to see whether car running well or using lots of fuel.
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
#7
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Sorry about that 16 miles per gallon
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#8
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I did check the Overload Relay and the Fuse is in good shape and I did check the Connections by looking at it.
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#9
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emmissions
ok so have to assume that car is just running too rich when you step on gas[beyond range of o2 sensor to control] or........catalytic converter is weak.
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David S Poole European Performance Dallas, TX 4696880422 "Fortune favors the prepared mind" 1987 Mercedes Benz 420SEL 1988 Mercedes Benz 300TE (With new evaporator) 2000 Mercedes Benz C280 http://www.w108.org/gallery/albums/A...1159.thumb.jpg |
#10
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Ok how do I fix the O2 sensor to start with. I do blow alot of grey/blueish smoke when when the car is under alittle load or going up hill.
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#11
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What do you think I should Do. I may have the tools to work in the car but i love to see what you think I should Try.
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