March 31, 2025, 07:58:20 PM

Author Topic: FC LS swap+PA emissions  (Read 2091 times)

Offline red dragon

FC LS swap+PA emissions
« on: July 29, 2023, 09:43:15 PM »
Hello all, I live in a county of Pennsylvania that requires annual emissions testing.
I plan to swap an LS in my s4 fc and while I'm sorting out brakes, suspension, interior, etc. (the car has been sitting for 14 years) I'm looking for advice as to what I need/don't need as far as emissions equipment to make this swap legal once I get to prepping the LS for install.

PA offers registration under classic car tags, with that the car would be exempt from emissions testing. The downside of that type of registration is an annual mileage cap, I believe it's 5,000 miles.
From my understanding the inspection process is "visual", meaning that since there is no OBD port the technician will just visually confirm that all the emission related equipment is present.

Now the main question I have, and perhaps those of you that have been through a similar situation can help answer, does the emission equipment like EGR, EVAP, cats, charcoal canister, need to function or does it just need to be installed and appear as though to function?

I would like to register the car with a normal tag so I'm not restricted to annual mileage, also I plan to send the GM ecu out to remove VATS and if necessary remove all emission related functions as well.



Offline red dragon

Re: FC LS swap+PA emissions
« Reply #1 on: August 05, 2023, 10:36:30 AM »
So I guess I’m the first PA resident to take on this kind of swap?  :confused:

After nearly 100 post views I’m truly baffled that no one has any info on emissions legal LS swaps in my state.




Offline T34418L31

Re: FC LS swap+PA emissions
« Reply #2 on: August 06, 2023, 07:57:32 PM »
PA resident in an emissions-required county here.

Given the age of the thing, I would expect most places to give it a visual once-over, and as long as it checks the common boxes (read: does it have a cat on it), it'll pass. That being said, I'm not a licensed mechanic, and I can't confirm this. My car sees less than 5000 mi/yr and is emissions exempt with a regular plate, and I still haven't received real confirmation on what the actual requirements are. You could always ask around locally to wherever you are to get a feel on what shops may expect.