Hi to everybody and sorry for my poor english,

I have a problem of polution on my Suburban (09/1994) : the CO it's to high and I can't manipulate the electronic system of injection because here in France I don't have the instrument who plug on the electronic system ... and, for the instant, I don't find a garage mechanic who have it. So, the question is if it exists another solution to regulate the fuel injection in order to decrese the polution.
Thank you!
Regards, Catalin

Hello from Minnesota

You might try changing your oxygen sensors. I changed the forward 2 oxygen sensors on my 1999 suburban and
my exhaust was much cleaner and my fuel economy improved. Good luck.

the catalytic muffeler can also be broken