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Old 01-17-2013, 04:24 PM   #2980
Scooby Guru
Member#: 314216
Join Date: Mar 2012
Location: ND
2012 2.0i Sport 5MT


Originally Posted by Guzzi 1 View Post
Interesting. Perhaps they should have kept the old wording. That is different than the sticker I have off mine, as you pointed out.

Dumb question: Were there '12's that carried the PZEV designation and some that did not? (Of the standard Impreza's) And if so, were there really fundamental differences or was it just prior to getting the rating? Seriously, for me it is a curiosity thing.

different cat, tighter closing injectors are the 2 big ones.
It is required on 2012 Imprezas sold in CA, CT, MA, MD, ME, NH, NJ, NY, OR, PA, VT, WA. It costs $300
1. A charcoal canister catches unburned gas left in the engine when it's turned off so it doesn't just evaporate.
2. Fuel injectors that close tighter when they're not in use.
3. A finer mesh in the catalytic converter, as well as optimized placement of its precious metal.
4. The engine's electronic brain is tuned to run the hot at start up to help the catalytic converter heat up so it can start doing its job faster.
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