1990 LT5 emissions fail - ZR-1 Net Registry Forums

Racinfan83 · 05-10-2013

Not trying to be a smartarse - but are you sure you even have to pass emissions with a 1990 model car?? We have emissions in the Metro area here - but in Mo the car has to be a 95 and up. The test here is also an OBD test that plugs into the ECM to see if there are any codes, they don't do the "run test" anymore. You might want to check and see if you are exempt???
And I have also seen cars with ZERO emissions equipment on them that are well tuned pass a run test with lower emissions then a car with a ECM and full emissions. I proved it to one of my professors in College. SO - I guess what I'm saying is that it may not be running "great"....

05-10-2013	#2
Racinfan83 Join Date: Apr 2013 Location: Eastern Missouri Posts: 773	Re: 1990 LT5 emissions fail Not trying to be a smartarse - but are you sure you even have to pass emissions with a 1990 model car?? We have emissions in the Metro area here - but in Mo the car has to be a 95 and up. The test here is also an OBD test that plugs into the ECM to see if there are any codes, they don't do the "run test" anymore. You might want to check and see if you are exempt??? And I have also seen cars with ZERO emissions equipment on them that are well tuned pass a run test with lower emissions then a car with a ECM and full emissions. I proved it to one of my professors in College. SO - I guess what I'm saying is that it may not be running "great"....