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Advice to pass emissions test MA? 200 1989

posted by  TonyIII on  Sun Jan 2 10:49 CST 2005
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My 84 would pass the no load test with no problem, year after year. Failed the first NJ load test for high NOx. All my vacuum hoses were fine as I had a failed AMM a year prior. Anyhow, I opted to change the cat as it was original. What was amazing was there was no catalyst left inside! I installed a cheap aftermarket cat & the car just barely passed by 2 point of the max limit. But a pass is a pass which is good for two years. I took it through early this year & it passed with several hundred points below the max. I did two things. I had been using premium fuel for the last year after reading about it in Popular Mechanics for lowering NOx. I also took it in on a rainy day.

Good luck.






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