NefMoto

hi im newbie in here so little help needed.

What are all the things ive have to change?
Immo off from L-box eeprom?

Im going to change my s4 preface 551C ecu to facelift 551L ecu.What are all the things ive have to change? Immo off from L-box eeprom?
Can i use m-box .xdf and files in L-box?

sorry bad english..

S4 C is 6sp and 512k. L is tip and 1024k

You cannot flash an L (or M) image onto a C-box unless you replace the flash with a 1M chip.

The L box image will not run in your car if it is manual.

You'll have to use M-box.

Also, your C-box car has a bosch MAF, so you will have to modify the Mbox accordingly.

Also, your C-box car has an older cluster, so you may have to make a few modifications in the CAN bits on the M-box file to prevent various DTCs.

Finally, there will probably be various coding issues involved (cluster and engine).

and if, as an example, take the c-box and replace the eprom to 800bb,can I put in my g-box file and use it as a spare?

any downside from this?

Then how i can get 1mb chip in my cbox car?
Box i have, 551l allready has manual tuning inside. Jfonz has done it.

The physical 551L box can be loaded with any 1M image if your choice, including any manual image.

I have a c-box without immo, i desoldered the 29f400bb and put the 29f800bb with 1Mb m-box file but don´t start the car.
Do I have to buy a ecu with 1MB or is there any solution? Thank you

You may need to load an mbox eeprom as well. I have no experience with converting 512k ecus to 1M ecus... I bet dd knows though :)

I'll try and I'll post the results. ;)

Ecu 8d0907551c + 29f800BB with 8d0907551M image + 95040 8d0907551M dump = Don´t work. Any solution?

Find a 1M ECU :(

Is it indifference ME7.5 or ME7.1 ?

Yes, different. Also, you can't use ME7.1.1

Also, daz posted a 551k definition recently, that would likely be a closer match to your c. You could try that in your hacked 1m ecu.