Hi all,
This past weekend I finally pulled my '96 Camaro out for summer use. I decided to finally replace the low-tone horn which requires the removal of the splash guards. While down there, I was horrified to see how dirty and full of junk the two filters were on the cold air intake. It was so dirty, I could barely see the pleats.
I did the best I could to clean them without removing them (long story) by tapping the excess debris out and vacuuming the surface. I couldn't get replacement filters until this weekend so the quick job had to do.
My question is how the clogged filters would have thrown off emissions testing. I know my last emission test, my HCs were 24ppm out of an allowable 52ppm and the NO was 394ppm out of allowable 424ppm. Would a very clogged air filter thrown off the NO reading?
EDIT: I'm hoping it would since I was disappointed my emissions #s didn't improve despite fresh o2s & a new cat (150k on the OEM cat).
This past weekend I finally pulled my '96 Camaro out for summer use. I decided to finally replace the low-tone horn which requires the removal of the splash guards. While down there, I was horrified to see how dirty and full of junk the two filters were on the cold air intake. It was so dirty, I could barely see the pleats.
I did the best I could to clean them without removing them (long story) by tapping the excess debris out and vacuuming the surface. I couldn't get replacement filters until this weekend so the quick job had to do.
My question is how the clogged filters would have thrown off emissions testing. I know my last emission test, my HCs were 24ppm out of an allowable 52ppm and the NO was 394ppm out of allowable 424ppm. Would a very clogged air filter thrown off the NO reading?
EDIT: I'm hoping it would since I was disappointed my emissions #s didn't improve despite fresh o2s & a new cat (150k on the OEM cat).
Last edited: