Emissions Test Success

[gbmidyear66]

I've seen a few recent posts of other ZR's enduring the pain of emmissions testing.

Where I live - older cars have to run the emmisssions gauntlet yearly. I was a little concerned how this would go - given that my 67 usually gets through by the skin of its teeth. I have a one year grace period with the ZR-1 since I recently purchased the car.

I have recently replaced the injectors (Multec look alike disc types from FIC) replaced the plugs (NGK Iridium) and loaded the stock GM PROM. Thought I better give it a try while I still have plenty of time to fix any problems. Made it through with flying clours - my readings were as follows:

Driving Test:
Hydrocarbon ppm - 7.0 (88 allowed)
Carbon Monoxide % - .02 (.66 allowed)
NOx ppm - 5.00 (979 alowed)

Idle:
Hydrocarbon ppm - 8 (75 allowed)
Carbon Monoxide % - 0 (.42 allowed)


Well tuned - these cars can actually run pretty clean.