In a few days I will be taking my car to a very reputable shop for the Osiris tune. But before that I have a few questions that I was unable to answer on my own through searching.

Is there a way to confirm my car is supported? How do I know which ECU I have? My car was built in Jan of 2003.

Also, I've had the base timing advanced 2 degrees. On UpRev's site they mention this could be an issue, so I guess I'll have to undo the advance?

If someone could answer those questions or has had their 03.5 sedan flashed and could chime in, it would be appreciated.

 

Nobody?

 

If you don't have the doggy door, I'm 90% sure you are supported. The funky eccus were only installed in the very early 2003 sedans. Most (if not all) had the doggy door on the trunk.

You can always email your vin to UpRev and they should be able clarify. Or take out your lower side panel and see if the ecu you have has a black connector (good to go) or the light gray one (not good to go)

 

Well I found a black connector on my ecu, so I'm hoping that means all is good on my end.

All I need to know now is whether I need to undo the 2 degree base timing advance, but maybe the shop can take of that for me if need be.

 

Just look under your steering wheel where the OBDII port is. If that is gray you are hosed.

 

I would think the Osiris reflash would override the base timing reflash?

 

I hope so.

Tomorrow is the big day, so I shall find out.

 

Well it worked, and I'm extremely pleased with the results.

 

What're you number?

Can you post a before/after dyno sheet? Also, how has the powerband/delivery changed?

 

I need to swing by the shop again with my usb drive to pick up my files before I can post any sheets.

I can tell you I did make 250whp and 246wtq, I picked up about 15 peak whp from the tune. The torque curve is much flatter throughout the powerband and the car definately drives a bit differently now.

Relevant mods: Stillen intake, MD 5/16", UR ceramic HFCs(planning on dumping these), Stillen gen2 CB.

I think I'm gonna save up for ART pipes to get rid of my POS HFCs.