KlausC Posted May 12, 2013 Report Share Posted May 12, 2013 I am interested in getting a new ECU for my 96 850 NA and 5 speed. There aren't too many in the USA and I was wondering if I could plug-and-play with a European version. Of course, I don't know what the model number would be and would have to trust the seller to send me the right one. Sending it back is a bit costly. Link to comment Share on other sites More sharing options...
Keaton85 Posted May 12, 2013 Report Share Posted May 12, 2013 For what reason? Just for fun or is there an issue with yours? Link to comment Share on other sites More sharing options...
KlausC Posted May 13, 2013 Author Report Share Posted May 13, 2013 Mine has been replaced by a former owner, someone wrote 'good' on the side of it. There is a Brickboarder who has a 'fried' unit, and I would like to try a Euro version just for fun and to see if they get better mileage. Link to comment Share on other sites More sharing options...
mercuric Posted May 13, 2013 Report Share Posted May 13, 2013 Check this: You might have a chat with Lucky... Sounds like you two have a common interest in tweaking the N/A cars Link to comment Share on other sites More sharing options...
burnout8488 Posted May 14, 2013 Report Share Posted May 14, 2013 Oddly enough I think there's a 94 855 NA 5MT in my local yard if you're keen on another ECU... EDIT: Woops, thought the OPs car was a 94, read it wrong. Link to comment Share on other sites More sharing options...
Kevin. Posted May 14, 2013 Report Share Posted May 14, 2013 94 ecu will not work since it uses the LH3.2 management system not M4.3 Link to comment Share on other sites More sharing options...
mercuric Posted May 14, 2013 Report Share Posted May 14, 2013 Hmm, I was under the impression 96+ NA 850s were M4.4, but indeed VIDA shows both M4.3 and M4.4, depending on market. I guess (most?) north american cars were M4.3? If that's the case, tuning the fuel/ignition maps becomes much easier -- Motronic Suite and a K-line serial cable would do the deed. M4.4 isn't really much more difficult to work with, but you can't read the entire flash chip over the serial interface -- meaning you'd need to desolder it and read it the old fashioned way (with a hardware chip reader) since I've yet to see anyone share any NA motronic binaries on the various tuner forums.. Plenty of options for T5 binaries, nothing for NA. Link to comment Share on other sites More sharing options...
KlausC Posted May 14, 2013 Author Report Share Posted May 14, 2013 It's M4.3 so the 96 and 97 are pretty close. My problem is that I don't have any OEM numbers on my ECU. Some dodo brain removed the stickers, so who knows what I have. It appears to work just fine... If I look at the UK Ebay, I get lost with their numbers and lack of description. The Swede site is even worse. If I had valid numbers, It might makes things easier. Time to go back and look at Motronic 4.3 for a 2.5L. Link to comment Share on other sites More sharing options...
mercuric Posted May 14, 2013 Report Share Posted May 14, 2013 Well that's just great! It gets even more fun: There are (at least) 5 variables to ECU software revisions: transmission type, EGR, SAS, immobilizer and target market. Also, there are multiple versions of the same Bosch part number -- For example, the Bosch #0261203072 ECU for a T5 US automatic has at least 4 software versions (that I've got my hands on so far) -- These will all correspond with different OEM (volvo) numbers. Best bet is to find a forum member with a european car with the same combination of EGR, SAS, immobilizer and transmission you have, and get the OEM number -- P0XXXXXXX, not the bosch (026120xxxxx) number and try to track down one of those ECUs. I've long hoped to find a definitive list of these numbers, but I've never had such luck. Also, The P0XXXXXXX numbers on the ECU label do not match up with volvo part numbers as you'd find in VIDA, etc. Link to comment Share on other sites More sharing options...
Kevin. Posted May 14, 2013 Report Share Posted May 14, 2013 93-early 95 used LH 3.2 95-97 used 4.3 98 used 4.4 99-2000 used ME7 I remember hearing that some 97 850s had 4.4 but Im not 100% on that Link to comment Share on other sites More sharing options...
KlausC Posted May 15, 2013 Author Report Share Posted May 15, 2013 Well that's just great! It gets even more fun: There are (at least) 5 variables to ECU software revisions: transmission type, EGR, SAS, immobilizer and target market. Also, there are multiple versions of the same Bosch part number -- For example, the Bosch #0261203072 ECU for a T5 US automatic has at least 4 software versions (that I've got my hands on so far) -- These will all correspond with different OEM (volvo) numbers. Best bet is to find a forum member with a european car with the same combination of EGR, SAS, immobilizer and transmission you have, and get the OEM number -- P0XXXXXXX, not the bosch (026120xxxxx) number and try to track down one of those ECUs. But the Europeans do not have the same emissions we have, even the Canadians have a Lambda light along with a CEL. I don't have EGR and I am deleting the SAS. I just want a 'basic' ECU for a manual tranny and no turbo. One would think that wouldn't be too hard to do. And, yes, the car does have immobilizer... So, I can't just get any old Euro version for my 96 GLT. Darn. Link to comment Share on other sites More sharing options...
optimus prime Posted May 15, 2013 Report Share Posted May 15, 2013 97 850 lpt used 4.4 not the NA cars. Link to comment Share on other sites More sharing options...
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