PCV has nothing to do with catalytic converters, it vents crank case pressure back into the TB.
No smog, means a dirtier running engine. Higher carbon build up on parts, contaminated oil, prompting the necessity for shorter change intervals, etc. Your PCV works that much less effectivly and needs to be changed out that much sooner. So while a missing smog system may not have a direct effect on the PCV valve, it certainly has an indirect one.
Cats only clean up the exhaust fumes from the cats back to the exhaust tips and that's all. The "cleaner" air from the cats do not recirculate back into our engine. The EGR gets it's air from the heads (not the h-pipe) and pumps it back into the engine via EGR spacer, not the throttle body which is where the IAC is located. I've never have had a problem with my O2's crapping out but maybe I didn't keep my car long enough for them to fail as a direct result of no cats.
Smog diverter valves circulate air both to the engine and into the converters. They pump fresh air into the converters during cruise, for cleaner external emmisons. During cold start and idle however, they're pumping fresh air into the combustion chambers, improving efficiency and keeping carbon deposits low.....So yes, the EGR, IAC and O2's are most certainly directly affected by the system. And while the ECU may provide enough adjustability to allow the engine to run without them in place, it most certainly isn't running optimum with the factory parameters plugged into it. The OBD I computer just isn't that advanced. Over time, parts will stick, parts will plug up, parts will wear, parts will fail and codes will be tripped. While it may run without it, it will run longer, cleaner and better with it....this is an undeniable fact.
Thank you for all your doom and gloom over removing a smog pump and cats but I'm not buying it. Yes I agree the air is a little dirtier but BFD. If that's the argument then why should I even own a Mustang as a toy? Shouldn't I sell it and hug a tree and in my spare time slash diesel truck tires and key "gas guzzler" on the side of hummers and excursions?
Why is the response from the guys with cars that run dirty always to tell the other guy to go hug a tree? I don't know about you, but I'm all about efficiency....and there's no reason one can't have the best of both. The new Coyoted puts out a fraction of the emmisions that the 5.0L OHV's does, while retaining better mileage and making double the horsepower. This isn't 1987 anymore....there's really no excuse to be running around with an open exhaust and no smog pump. These cars will make just as much power with them, than without. More smog equimpent is removed due to ignorance than for any other reason as far as I'm concerned...the horsepower/engine bay clean-up is just a bunk excuse from about 99% of the owners that do it, IMO.
@Boosted92LX
Your MS and my PiMP don't look for smog equipment so smog related CEL's and codes don't apply to us as you just stated
Awesome...and all it took was $1,000 in hardware/software and dozens of hours worth of tuning to do it. Makes removing $100 worth of smog equipment soooo worth it.
fwiw,. i've removed the smog equipment on every fox body I've owned. Wonder how we all survived growing up before all this smog stuff was thrown on cars..lol
Carbuerators, points ignitions, no tech and gasoline prices in the $.40/gallon range would be my guess.
I agree and I'll never do UD pullies. Not with a stereo, AC, electric fans etc. Slowing down the charging system and the WP while at stop is a bad idea.
March pulleys, Big stereo, Taurus electric fan, A/C, full power group, Silverstar headlights....
3G alternator with a pulley swap......13.8V at idle, all day long and car has never gotten over 210F with a 100% stock cooling system.