My engine tuning specialist wants to adjust the idle speed on my Vauxhall Cavalier SRi "130" 90/91, motor = 8 valve 2 litre "20 SEH". The tickover is a bit rough. The ECU is hard coded but he has some software that can access the ECU and make the changes. But to do this he needs to know where to find / the address of the Damos file on the chip. The chip number is 1267 356 421. The ECU number is 0261 200 378. All attempts to get this info from other forums, Vauxhall and even Bosch service centres have failed. Can anyone tell me the address on the chip or if not, who and where to get this from at Bosch??

[Engine serial no : 1425 7210. GM 0670 A 9569 43. VIN WOL 0000 89 MV 164 618]

Is this the correct sub forum to ask for this assistance? There are several alternatives where I could have posted.

Thanks

He needs to desolder eprom and show the .bin file here so we can take a look... should be easy enough to identify though.