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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999

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Old Wed, Dec-30-2009, 12:07:40 AM   #11
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Wow, those numbers are high. When was the last time you cleaned the MAF? Not sure how the dinan intake is set up, but the oil from my ECIS gets it filthly. Could be a reason for the high HCs.
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Old Wed, Dec-30-2009, 12:09:02 AM   #12
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OK so when I checked the coils, I simple ran the car idle and would check if there was a difference in idle. Each coil was unplugged and a noticeable change in the sound of the motor was observed through each coil. I assume that they are functioning correctly.

Next I ran the r5 scantool. It reads:

FF18 Ignition coil #6
FF19 Ignition coil #5
FF32 Ignition coil #1
FF33 Ignition coil #3

Is there something else I can check for with this coils to see what is exactly failing? Would this be the cause of the numbers I am getting for smog?
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Old Wed, Dec-30-2009, 12:20:21 AM   #13
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i'd check your actual values of teh O2 sensors and make sure they iz working correctly. also check for airleaks as your HC's & NO are really high! this would fool teh MAF sensor and dump in more fuel as it thinks its running weak. another basic test would be to hook up a vacuum gauge and see what manifold vacuum is doing. other than that a shop would be your best bet as they have teh equipment to diag your problems correctly
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Old Thu, Jan-14-2010, 11:52:57 PM   #14
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With NO(NOx) that high it's going to be the cats especially with your mileage. I have a 1995 M3 and that cat had to be replaced at 100,000 miles because of high NOx levels just like yours.
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Old Sat, Jan-16-2010, 02:47:23 AM   #15
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Op, once you get the errors cleared up and no cels, drive up to mission viejo and let USA Smog test it.

The tech there is knowledgeable and understands these cars.
If it can pass, it will.
Or you'll have good numbers to determine the best course of action.
Plus the retest cost is minimal.

No I'm not affiliated with them just another e36 M3 owner living in an enhanced area in California.

USA Smog
25721 Obrero Dr. Unit D
Mission Viejo
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failing, smog

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Discussing M3 failing Smog in CA Help!! in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)