Hey guys,
On Thursday I installed a catless exhaust. My intention was to order a set of O2 spacers to correct the error codes.
I've driven the car a good bit since the install and no CEL.

Yesterday I pulled out my Durametric to check readiness and all was fine.
Could this mean I already have a tune on my car?
Is there any way to tell if it does have one?



Thanks

check what boost your car is running. stock is 0.8 bar anything more and you have a tune.

My boost is often at 15 psi. I'll double check today.
Thanks

Just having a "tune" will not necessarily keep a CEL from occurring when you go catless. The catless part specifically has to be "tuned out" from the program and if you had a catted system whoever did the tune probably would not have done that, imo. It just one of the things tuners can modify when practicing their craft.

Not sure about the "anything above .80 bar means you have a tune" comment either. 15 psi (which is 1.03 bar) seems rather stockish to me especially in sport (overboost) mode. Fifteen psi on a tuned car would be awfully weak. Also, the Porsche psi gauges are rather inaccurate to begin with and there are literally dozens of variables which influence boost so what you are seeing on your computer screen is at best a close approximation at a particular point in time.

Now that you are catless, one of three things might happen. You might be one of the few and the lucky that never throws a CEL. Or you might successfully install O2 extenders and eliminate the problem. Or, like most of us, you will need to have someone remove the problem via the ECU tune. You'll probably need to put a few hundred miles on the car before you can guess at the outcome. Personally I would just do the tune rather than spend money and aggravation on the spacers and then find out you need to tune it out to get a complete fix. Good luck!

Thanks for the info.
When I bought the car it had the stock exhaust on it.
While installing my new exhaust I noticed that the O2s had tool marks on them (one was slightly rounded) which indicates to me someone had removed all the 02s at one time.

I understand that the O2s have to be tuned out by a tuner.
In the near future I plan on getting a tune for the car however, I was going to use the O2 spacers until then. I just picked up the car three weeks ago and have spent quit a bit since I brought it home.

All my recent findings made me question whether or not the car had a tune on it. I would hate to purchase a tune and later find out it already had one.

A couple of thoughts:
1. Unless a tuner can "open" your ECU and see if anything has been modified, about the only way to know if you have a tune for sure is to put it on a dyno and see if out performs stock. Even then you won't know how the various parameters have been modified.
2. If you purchase a new tune you will at the very least know what you've got and it will be consistent with where you want to go modification wise with your car. If you keep what you have, well, you probably will never be quite sure what you've got and it may in the end just be stock anyway. There are quite a few very good tuners out there and some that aren't so good. You may gain quite a bit of peace of mind in the years ahead if you start with a solid platform instead of always wondering who did it and what did they specifically do.
3. As far as the $$$ go, Welcome to the Slippery Slope!

Wouldn't the previous owner know? Ask them.

If I knew who they were I would.

Maybe someone on this forum knows the car. Based on your response I assume this wasn't a private party transaction. Maybe ask selling dealer to have prior owner contact you.

The readiness codes may still be set from before you swapped the exhaust. If you really want to know, clear codes (even if you don't have any faults, this will reset the readiness monitors), and if the catalyst efficiency readiness monitors show "ready" or "not present", then they have been tuned out.

Ive done this and they still show ready.


Yesterday I received GREAT news from Protomitve....
My car has their tune on it already!

I spoke with Todd and he filled me in on all the details.

I would just do the tune rather than spend money and aggravation on the spacers and then find out you need to tune it out to get a complete fix. Good luck!