CO951

I know I have an "after" of it passing with a gutted cat from 2012 with only a different chip and 20-25% E85. I will have to look to see if I still have the before, during and after tests from 2010 when we did the experiment.

88Silver924S

Here in Washington state my car aged-out of smog testing a few years ago, whew! While replacing the expensive stuff, cat, O2 sensor, etc. make sure the simple, cheap stuff is good: clean air filter, clean & gapped plugs, new-enough rotor and distributor cap and non-leaky ignition wires.

How does she run? Smooth and powerful or rough and chuggy? Leaky injectors? Cracked J-boot? Leaky brake booster hose? Good luck with your testing.

kyle a. w.

Update: getting my cat installed right now. Tech just showed me the cat he took off my car...hollowed out. 100% empty. Big thanks to my cars previous owner.

kyle a. w.

Update part II: I am going to replace the plugs. cap, rotor, and plug wires were both replaced a few years ago. Found a crack in the breather tube from the aos and i will be replacing that Sunday or Monday. And while I'm in there I'll be cleaning all the grounds.

V2Rocket

Was the old cat original? If so could you keep it? I have a use for it.

kyle a. w.

Ah crap. Shop took it. I'm guessing it's in a dumpster somewhere. It was original. I can call and see if they still have it on Monday if you'd like though.

kyle a. w.

Passed today! New walker cat, O2 sensor, replaced my cracked aos hose, cleaned all my grounds while I was down there and now my car is legal to drive in CA! Thanks for the help guys!

PaulD_944S2

Smog check looks good.

Your HC & CO are nominal, but the NOX is really low, probably typical of a new cat.

Which Walker cat was installed?

kyle a. w.

I used the walker cal cat part #80801 I believe.

V2Rocket

That's the cat I have...been good for 4 years now.
The only CARB legal Walker cat for a 944...cheap, durable, easy to install.

You look like you might be running a little rich with those numbers but still great otherwise!