If you have not done dealer recall, save your tune and adjust for oem injectors. Then go to dealer to do recall retune.
To avoid tuning back and forth, buy a spare ecu.

 

you could just save the dealer rom and flash it back over yourself instead of rolling 2 ECUs. I think you might be able to get the rom yourself from https://mitsubi****echinfo.com/ and save yourself the trip to the dealer. I'm not 100% sure on that one yet, at some point ill drop the 20 bucks to poke around and see what they have available.

This Excerpt here from the site makes it sound like this is definitely possible:

"Legacy PCMs Refer to (Reprogramming System Identification Chart) for details (ISO9141) protocol for re-flash communication. A software application, Update Manager, is required to re-flash this type of PCM. Update Manager consists of 2 parts, Update Manager A & Update Manager B. Use Update Manager A to determine the current PCM instruction level (current flash level), known as ROM-ID. Then use Update Manager B to re-flash the PCM with re-flash files and other support files downloaded from this website. If installed for the first time, some K-Line PCM's require additional initialization procedures - for example, Immobilizer Key Code Transfer. To perform these initialization procedures, a MUT-III Special tool must be used. Please refer to the "Special Tool" section of this webpage for details."

 

Ref wanted a copy of my dealer receipt showing my ecu was reflashed. Not sure how you prove you have the oem tune without dealer receipt.

 

good point, I guess it would come down to how reasonable they are willing to be. If it was me I would try and see if I could send them a receipt for the tech site, a copy of the rom if they want it, video of me flashing it to the ecu etc. I know it's not illegal for you to repair your own car so there should be a way. Again though it might just come down to how reasonable the individual you are working with is willing to be.

I'll dig through the vehicle code when i have some free time to see what it says about repairs.

 

There is a recall for ecu? To be honest, i haven't been keeping up with any of this for awhile, car just sits in the garage so i didn't even know

 

So from the California BAR Smog Check Reference Guide, Page 34 2.1.7 Owner Repairs

"Owners of vehicles that fail a Smog Check inspection may repair their vehicles themselves."

That Seems pretty definitive to me.

https://www.bar.ca.gov/pdf/Smog_Chec...ence_Guide.pdf

 

Wouldn't this change the CVN and fail the inspection?

I'm currently struggling to get my car in compliance. It's bone stock, but the IMMO code was lost so I'm running a bypass (bit 3 in FAA periphery section) and I don't think it will pass.

 

I've got one of these on the way. When I get it ill trying changing my immobilizer code and check to see if it effects the CVN. I have a feeling it wont, because that would require them to record and provide a different CVN for every calibration for each individual car. Just on the general laziness principle I would expect it to be one cvn per calibration for all vehicles using that calibration. TBD I guess.

 

I read in another thread that it doesn't affect CVN.

 

FYI, PCMScan (https://www.palmerperformance.com/pr...scan/index.php) reads CVN and many other things. Also works with Tactrix OP 2.0

I've used it to read mine and see when it changed on my Evo 10 while doing things

 

Thank You!!! I was trying to find something that would work with my openport 2.0 but my google fu failed me. This seems pretty fancy compared to sending commands from a terminal and decoding hex responses. I'll give it a shot if I can't make progress with the sparkfun board.

 

Your assumption is correct. I tested Changing immobilzer code , it DOES NOT effect CVN number at all. I posted this and a lot of other good information in the other emissions forumn.




I'm going to post threads here I found useful and pertains to this topic. If you have any other ones please let me know so I can add it here. Enjoy , your welcome, and lets keep working together on all this good info!
https://www.evolutionm.net/forums/ec...mrfred-39.html

https://www.evolutionm.net/forums/ge...se-help-8.html

 

You can check the CVN with a cheap bluetooth OBD2 scanner and the free CarSys app.

I didn't mean the immo code would change the CVN, but rather the immo bypass. I suppose I can just remove the immo bypass temporarily and see if the CVN changes..

 

Yeah I know, I am trying to gain a better low level understanding of whats going over the wire though. That's a good point about disabling the immobilizer. I have a feeling that will effect the CVN.

 

Anything I changed in my Evo 10 rom would make the CVN randomize itself. It also doesn't do it right away after flashing. I noticed if I changed something, reflashed, then read the CVN right away, it would remain the same as before. If I checked again after some time, it would then be randomized.

The 10 doesn't have the immob in the ECU so I don't have to worry about that.