aperalta

Time to get the Pcar smogged for registration and I have a question regarding the sniffer part of the test. To my recollection when the shop measures the emissions from the tail pipe they place the car on rollers to engage the transmission and run the car to a certain rpm for a designated time. Since we have AWD do we need a shop with rollers for the front and back? I would hate to cause wear and tear on that viscous coupler. Anyone have a reputable shop in the O.C. to use? Thanks guys--Aaron

ca993twin

The AWD 993 models should get a pass from the rollers. They simply can't do it properly, and when they look it up, the book will also confirm that. Do not let them put your TT on rollers... it will wreck the VC.

JJayB

Don't allow a shop to put the car on the dyno. The test can be performed without the dyno load. They wil run it at idle and 2500 rpm with the sniffer.

Before they do that they plug into the OBD port and check to see if it throws any flags. The system is linked to Sacramento so once its hooked up they know who you are. If your battery has been disconected drive your car at least 50 miles in traffic so the ecu will store enough codes to show ready on the shops computer.
Call several smog stations to verify if they've done porsches, AND if their computer is on line. Good luck and let us know if you had any problems.

MarkD

What Steve and Jimmy already said, no rollers, they do an idle test and rev engine to around 2500rpms, check for codes... even if your car is a soon to be wrecked 2WD conversion, you still get a pass on the rollers

a drive of 50 mile or 500 miles will not (unless you let an elderly relative drive) set all of the readiness codes.

It requires a painfully low RPM "drive cycle"... search the 993 forum for "readiness drive cycle" if you need that info.
Other than that I have never had a problem and I had to go to a "test only" station for the test this past week. No sweat and I'm not even sure if the guy could spell Porsche.

JJayB

[QUOTE=MarkD;6213211]. even if your car is a soon to be wrecked 2WD conversion, you still get a pass on the rollers

MarkD

[QUOTE=JJayB;6213474]yeah... I joke and it's funny now but honestly, even with stock HP, I wonder what fast sweepers will be like...

chris walrod

You not only have to set the readiness flags, but you have to complete two drive cycles of the same <3K rpm granny driving -- its not particularly easy to do, some get lucky, some dont.
I drove my car over a thousand miles, not one flag (of 6 needed) were set.

JJayB

[QUOTE=MarkD;6213517]I think ViperBob managed to get some 335's on the back. That'll help.

aperalta

Thanks for the info. gents.