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#1
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High NoX emission
My 1989 300SE has been doing swell at 124,000 miles...still uses almost a quart of oil in 3,000 miles!
In Atlanta we must have emissions tested every year. I noticed last year, the Benz passed by ONE point on the NOx scale. In the past on another car, someone told me that when the NOx is high, the EGR is bad/failing. I put a can of 44K (made by BG Products) in 10 gallons of premium gas as recommended by a friend--I have no connection to the company. He said this would help to clean out the carbon in the head, along with a 100 mile run on the interstate. Question: If after this "treatment," the Benz fails on NOx, what do I try? Thanks for your help while keeping this "good one" running for a long time. |
#2
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IF you fail, you need to look at:
1. EGR Valve 2. Fuel mixture ( too lean ) 3. Catalytic converter.
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2007 C 230 Sport. |
#3
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1989 did not have EGR on the M103 from my memory... that was the 1990 model year and after.
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I'm not a doctor, but I'll have a look. '85 300SD 245k '87 300SDL 251k '90 300SEL 326k Six others from BMW, GM, and Ford. Liberty will not descend to a people; a people must raise themselves to liberty.[/IMG] |
#4
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one easy trick for passing a car with marginal nox[assuming you have corrected a lean fuel condition] is to pump up the rear tires to about 40psi.when a car sits on the dyno because of two rollers it has two bags on the tires and it takes power[extra push on accel]to make those bags move around the wheel.40psi should get you through.
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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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Thanks
Thanks to Manny, Hit Man X, and David. After replacing air cleaner, running a can of 44x in 10 gallons of premium, replacing the spark plugs,
putting 40 lbs of air in the rear tires, and driving 125 miles on the expressway, it passed by 6 points--much better than last year's pass by one point. The plugs were Champion...dunno who put those in! The deposits were built up, and the gaps wide. The local Benz dealer had the right Bosch number H 9 DC non-resistor. I spent two hours looking on line to no success. Another hour calling local parts suppliers also brought no success...but when I called RBM of North Atlanta, they said, "Of course we have those!" The service manager drives a 90 300E and said, "That's the only plug to use." They cost $2.19 each. Again, thanks! |
#6
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That BG stuff is pretty good. That's impressive, moving 5 points on the NoX scale by doing those particular things. I'm going to remember that!
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" We have nothing to fear but the main stream media itself . . . ."- Adapted from Franklin D Roosevelt for the 21st century OBK #55 1998 Lincoln Continental - Sold Max 1984 300TD 285,000 miles - Sold The Dee8gonator 1987 560SEC 196,000 miles - Sold Orgasmatron - 2006 CLS500 90,000 miles 2002 C320 Wagon 122,000 miles 2016 AMG GTS 12,000 miles |
#7
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Thankfully I live in the Boonies.. no emissions testing here... yet..
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