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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > ****possible Ecu Upgrade. Xede Issues****.



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      08-26-2008, 07:38 AM   #1
YARDMAN
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****possible Ecu Upgrade. Xede Issues****.

So i took my car in for my first annual service. I'm not sure if they did anything with my ECU but I don't feel the same power coming from the car as before. I am runnig AA Xede with the AFE dual cone intake. Before the car went in I truned off the Xede with the valet switch. When I got back in after the oil change I turned back on the Xede. Now I'm not sure if it's all in my mind but the car does not feel the same. Is there anyway to tell if the dealer did something to limit the power of my tune? I read somewhere that sometimes they do ECU upgrades that limit the tuning of piggybacks. Can anyone chime in on what I can do to check. I know i can dyno but I am hoping that there is another way or simplier way to check. The service order says oil change and wiper blades changed. Would it say ECU upgrade? If anyone from Active is on board please chime in as well.......
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      08-26-2008, 08:43 AM   #2
hotrod2448
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Go to the drag strip or dyno.

Most likely they didn't change your software or anything else performance related and it's all in your head though.
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      08-26-2008, 01:59 PM   #3
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well after you put it in valet once you turned it back on your edu has to relearn and adapt. It will slowly come back
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      08-26-2008, 03:03 PM   #4
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Word of warning especially if you are tuning...ALWAYS tell your SA to inform you BEFORE they upgrade your ECU! If they ask why, tell them the truth! You dont want the dreaded turbo lag with 29.2+. Also, if you have AA Xede you will need to install it differently by leaving off (if i remember correctly) 1 of the intercepted wires. Go to their website and download the .pdf and look on page 13 (or maybe page 16...my memory is going bad due to the high speeds I now drive).

Also, if I were you, I wouldnt just 'turn off our tune' with the valet switch. The minute they open your hood (even for an oil change) and see the black ground wire coming from your ECU you can pretty much assume that your car will be flagged for a voided warranty. Better be safe than sorry and take the 20 mins to remove it from your ECU!
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      08-26-2008, 03:06 PM   #5
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Side note: It sure would have been nice if AA sold a wire harness with their products since if youre like me you hate dealing with the pinout crap. I dont like dealing with it so much that Ive now hooked my Xede up to my laptop so it will go faster and will not be putting it back in my car. I figure I use my laptop WAY more than my car so it should run faster...plus I dont care about that warranty anyway
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      08-26-2008, 05:08 PM   #6
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Dont you guys get copies of the repair order's when you pick up your car? How about taking a few mins to read through it and you will find out exactly what they did and if the car was programmed or not..
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      08-27-2008, 09:09 AM   #7
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Quote:
Originally Posted by 1clean335i View Post
Dont you guys get copies of the repair order's when you pick up your car? How about taking a few mins to read through it and you will find out exactly what they did and if the car was programmed or not..
Thanks for the input. Like I said in the original post the work order did not say ECU programming. But do we really know if they would indicate such service on the work order since it's not a customer requested work order issue. It may be standard proceedure and they may not have to indicate that on the work order. I could be wrong. but what if I'm not.....
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