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So I'm pretty sure I bricked my ecu this weekend. My MVI2 no longer can read or write into the ecu and it does not recognize the ecu information like vin number or operating system when I plug it in. I'm assuming I will need to license the new ecu? What, if any issues will I need to address with the VIN number or vats on a different/used ecu? Any last tips on trying to save this ECU are also appreciated. Thanks!
You'll need to use credits to license the ECU. You can then write entire your original file, or just make the necessary changes to the replacement PCM and turn off the VATS. Changing just the VIN can sometimes cause a VIN/OS mismatch leading to issues or needing more credits again.
If you're worried about the VIN matching, you could also have a shop or dealership do a factory flash for you VIN so everything is back like stock. You will still need credits to license the replacement PCM going this route too.
Thanks for the response. I just ordered the ecu and plan to write entire my last file. If I write entire the file will I still need to deal with vats? Thanks again, I appreciate the info. This may be my last shot on this budget project.Quote:
Originally Posted by charcoal03silvy
I would turn the VATS off, yes.
If you ordered a reman PCM from a parts store or dealer, it will need a factory flash first since they come blank.
Houseeee
In the future try and give less details about what you are working with/on. :slap:
Great point. This is an e78 from a 2014 chevy spark. I added a turbo from a 2016 chevy cruze and a flex fuel sensor/injectors and walbro pump. I'm struggling to learn this gen 5 torque based tuning. In future posts I'll include logs and tunes. I was just curious about vats in general but to your point, details are crucial.Quote:
Originally Posted by 2xLS1
So the ecu I received was the same hardware but different OS. The ecu was from a sonic not a spark but same year. I licensed the new ecu and was surprised to see it was only 2 credits instead of 4. I then did a write entire of a file from my previous ecu that was licensed and turned vats off. Car starts and is exactly like it was before.
I have not changed the vin and when I read the file it says sonic. All the tables in both files are the same just different I puts. Everything seems fine, is there any need for me to change the VIN? Thanks for all your help.
Change the VIN only if the emissions testing people require VIN matching in your state. Otherwise, I'd drive on. Nothing to see here and these are not the droids you were looking for.
Rick
Thanks Rick!
How did you manage to brick it?Quote:
Originally Posted by LittleBlue
By factory fresh, do you mean to first write full, the entire tune captured before any changes made OR is this something only a stealership can do?Quote:
Originally Posted by charcoal03silvy
I became really complacent and was doing a lot of flashes to get the car to idle. It sat for a while and the battery was getting low in the car. Once the car died during a flash but I was able to rewrite it. It was acting different during the flash process after that and finally, it just would not finish the writing process and I could no longer read the ecu. Long story short I was lazy. Now, I have the battery fully charged or plugged in when I write a new tune.Quote:
Originally Posted by Hoagie