Here is the latest FAQ on the Eurotek ECU upgrade. Thanks to Kevin at NAPerformance and Phil at Eurotek. Feel free to suggest more questions and/or answers.
I will try to keep this up to date with answers and new questions, and keep it posted as the initial post in this thread.
- ECU programming
Q1. Can a dealer overwrite the Eurotek ECU program?
A1. Yes. Always instruct the dealer not to reprogram the ECU unless there is a catastrophic problem they need to address, or some sort of mandatory safety related ECU upgrade from the factory
Q2. Does reprogramming the transmission settings affect the Eurotek ECU upgrade in any way?
A2.. Yes the ECU and Marelli Cambio control unit communicate. If the dealer programs the Cambio it may make the car drive softer and shift terrible. Unless you have clutch chatter or serious problems don’t be alarmed and don't allow the dealer to do a Cambio upgrade.
Q3. Is our ECU upgrade visible to the dealer in any way?
Q4. If I am concerned that my dealer possibly reprogrammed the ECU back to factory settings, is there any way to detect the change other than observing the performance behavior of the car?
A4. It will appear on the RO of the service order. You can easily tell if the higher RPM limiter does not work, you can test in SPORT MANUAL MODE ONLY.
Q5. If my ECU upgrade has been optimized for 91 octance fuel (for example), and I decide to switch to a different octane, will the upgrade continue to be effective? Will it require relearning? Will it require reoptimizing back at Eurotek?
A5. You must send it back to Eurotek for a reprogram. Small fee will apply for labor time. Adaptation of the Cambio and throttle via the breakin instructions will have to be carried out again as instructed.
Q6. How do we optimize the ECU learning
A6. Read the breakin instructions that came with your upgraded ECU concerning aggressive driving for the first 100 miles in Sport mode. Drive it like you stole it!
Q7. If I am unable to follow the breakin instructions relative to 100 miles of aggressive driving, what is the impact? Do I lose potential power or torque or ???
A7. NO you just may get some hiccups because the throttle is confused from slow driving to aggressive driving. The harder you drive the better the Cambio will react.
Q8. If I disconnect the battery, or turn off the battery switch in the trunk, does the ECU forget the current learning parameters?
A8. Yes and you may have to input the immobilzer codes via the gas pedal, see owners manual. In some models (e.g. 2003 Spyder Cambio with factory alarm), you only need to reactivate the alarm by pressing the key button and wait ~30 seconds after turning ignition on, but before starting the engine, to let the ECU syncronize.
Q9. If I wish to reoptimize the ECU learning (for example, I wasn't able to follow the breakin instructions relative to aggressive driving), can I just disconnect the battery and go through the breakin instructions again?
A9. Yes but it must be done within 100 miles not a few hundred or a thousand then it becomes harder, the ECU software is fresh, best time to do it is now
Q10. Does the ECU remain in a continuous learning mode, even after the first 100 miles? If so, will performance be affected by long term conservative driving after the 100 mile breakin?
A10. No if you drive 50/50 you're fine; if you drive 80/20 (conservative/aggressive) the car may feel sluggish until you aggressively get on it for 50+ miles
Q11. If I add some additional performance upgrade to my car, such as a tuned exhaust or a high flow airfilter, should I put the ECU through a relearning process? Is this as simple as disconnecting the battery and then going through the breakin instructions again?
A11. If you add anything we must recalibrate the software again, learning wont help. Small fee applies. Each customer has software for the way there cars are set up now.
Q12. Will my engine run warmer than usual after the ECU upgrade? If so, what should I expect?
A12. Not unless you are killing the car but a tad hotter is nothing to be alarmed about, most gauges are not 100%, check coolant or switch to better anti freeze or add Redline Water wetter this helps a lot. Your car has a high reving small displacement motor, Heat is detrimental regardless of OEM or Eurotek tuned. Reducing heat helps longevity for the entire engine internals.
Q13. Is the automatic downshift from 2nd to 1st affected by the upgrade? If so, is there a way to avoid this?
A13. No its your driving style. Give it time you an the car will adjust, you may notice the car will REV in between shifts to optimize power transfer. In OEM settings, the cars RPM will drop in between shifts, = lurch effect.
Q14. At what RPM does the rev limiter activate with the ECU upgrade?