Hey y'all,
I've got a 1977 Toyota Chinook that needs to pass emissions and am curious to hear y'alls .02 cents. I live in Denver, Colorado. It failed the emissions test today. The results are as follows..
HC PPM ... 1135.8 with a limit of 400
CO % ... 11.31 with a limit of 1.50
Sooooo not great. Fortunately, the vehicle just needs to pass at idle.
Since Denver exists at altitude (5280 ft), I am going to check on the carburetor. It is likely running rich, especially if it has not been re-jetted.
Past that, I will take a look at timing and the cat converter (which it may or may not have I plan on looking tomorrow) ... I am hoping it is the carbs!
Do you all have any thoughts, reactions, etc?