TFI and Emissions

[jay79cj7]

RE: AMC 20 axles?

I live in an area of IL where we have emissions testing every 2 yrs. All they do on a model as old as mine (79) is a sniffer in the tail pipe at idle. I thought my results may interest some of you out there...

In July of 2003 my results were the following:
Hydrocarbons: 298 PPM
Carbon Monoxide: 0.8%
Carbon Dioxide: 12.4%

Today my readings were:
Hydrocarbons: 19 PPM
Carbon Monoxide: 0.1%
Carbon Dioxide: 13.4%

All I have done since 2003 that would affect emissions (besides change the fluids and air filter, of course) is the TFI upgrade. I have not adjusted any carb mixtures, timing, etc. I am amazed that my HC (unburned fuel) dropped over 90%, and carbon monoxide went down quite a bit too. The guy told me that it would pass limits for modern vehicles in the state. Not too shabby.

*Results may vary.

 

[GaryMB]

Nice results! I think that the oem smog stuff just never worked that well...I ditched it all and the jeep diesels less with the motorcraft carb and hei than it did when it passed emissions. Too bad my jeep has to pass a visual smog test every two years, though.