The HC ppm limit was 58 prior to 2005 in the province of Ontario, for the ASM 2525 test. In 2005 it was lowered 50. Last time the car was tested the result was 53.

So I am hearing that I should go for a retest as soon as possible and make sure to rev. the engine for at least 10 min. at 1500 to 2000 rpm until the technician arrives to take the beast into the test. The re-test is only $20.

The last time I checked, Mercedes list for the cat was C$2,200. I hope the timevalve cat. lives up to spec.

Where is the R16/1 resister located? How do I disable the vacuum advance?

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1989 420 SEL