Hi, all. I had been worried about my car ('84 240DL, 193K miles) passing inspection. It had been suffering a miserably rough idle until last month when I replaced the AMM (I had suspected everything else, but it finally died and revealed that it was the problem after all, as it wouldn't even idle after that unless I unplugged it) -- after putting in a new one, it idled beautifully. And I didn't even adjust the AMM -- just plugged it in, just as it came from the factory. But I was facing NJ's state inspection, including the dreaded "road speed" emissions test on a dynomometer.

Well, for those of you who worry that your car can't do it, look at these numbers from my report:
NOx reading=33, limit=1227
HC reading=27, limit=162
CO reading=0.02, limit=0.91
I didn't do anything special to prepare (e.g., no tune-up, no adjustments, nothing!), and it just passed this easily, despite its mileage and age. So don't give up hope on your own cars -- these volvo engines are incredible.

Wish all of you the same luck I had today!

I am having a similar NOx problem with my 1990 240. What is the AMM which
you refer to in your thread ? Please advise. Thanks, Joe Walsh

Hello,

We have similar testing up here in Ontario. The last time my wagon went through it generated cleaner emission numbers than my wife's 2000 Hyundai.

Enough said???

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Happy Bricking!!! - Richard - '87 245 DL , '82 242 GLT - Half a million km between them!!!

Would I be right in guessing that your wife's car is serviced by a Hyundai shop while your brick recieves TLC from you? A savvy driver who is behind the wheel every day should be able to keep a car in better tune than a bloke in a service centre who has never seen your car before and has to do 12 more before lunch

Fortunately we don't have tailpipe testing here, although I have an excelant emmisions system. What it does is to take a percentage of my polluting exhuast gas, passes it through my compression rings and filters it through my oil sump. It took me a while to work out why the car smoked out the oil cap.
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Drive it like you hate it