Working on an ECU related problem for my '98 S70 Non Turbo.
Original ECU was J6.2 P/N 0261204743
Ordered used replacement ECU, which is from another '98 S70 Non Turbo Auto that came J9.2 ending in 299.
I was a little reluctant when I realized but I figured I'd try it, drove for a while and no problems. I was just wondering if anyone knew what the difference was and if this could end up damaging anything running a different P/N ECU?
I'm hoping this maybe is just a newer rev that was given a different or superceeded P/N.
I am in California and the ECU came from back east, don't know if that might make a difference.
If anyone can fill me in on the difference or let me know if it should be ok not causing any other issues that'd be great.
'98 S70 NA ECU J6.2 (743) vs J9.2 (299) (poss. J6.2 issues?)
'98 S70 NA ECU J6.2 (743) vs J9.2 (299) (poss. J6.2 issues?)
Last edited by S70Man on 08 Jun 2009, 11:20, edited 1 time in total.
Think I answered my own question.
J6.2's (743's) was I think just superceeded by J9.2 (299's). I've known another person with a J6.2 ECU having the same problem I had so I'm thinking there might be an issue with the older rev ECU's. So far replacing it with a J9.2 seemed to have fixed it and it has been fine although it has a different Bosch Part Number (for anyone that might later have a similar question that this might help).
The problem is that intermittently after coming to a stop or when idling slowly, say backing out of a driveway, "sometimes" after running perfectly normal, will sputter, engine kind of goes "blah blah blah", shakes like it was about to stall, then picks back up and runs fine. It has never done it when driving in my case.
I've already done OEM plugs, wires, cap, rotor properly installed, new battery, cleaned IAC, replaced all brittle, leaking vacuum lines, tried a new AMM, Cam and Crank Sensor. I tried cleaning the ECU contacts. I talked to a dealer tech that had the same exact issue, he said he was never able to fix it after also replacing every part he could think of except the ECU and also narrowed it down to the ECU.
The good news is that there are a ton of good used, pulled J9.2 ECU's, they seem to be the most popular as the J6.2's were probably a transitional thing then improved.
J6.2's (743's) was I think just superceeded by J9.2 (299's). I've known another person with a J6.2 ECU having the same problem I had so I'm thinking there might be an issue with the older rev ECU's. So far replacing it with a J9.2 seemed to have fixed it and it has been fine although it has a different Bosch Part Number (for anyone that might later have a similar question that this might help).
The problem is that intermittently after coming to a stop or when idling slowly, say backing out of a driveway, "sometimes" after running perfectly normal, will sputter, engine kind of goes "blah blah blah", shakes like it was about to stall, then picks back up and runs fine. It has never done it when driving in my case.
I've already done OEM plugs, wires, cap, rotor properly installed, new battery, cleaned IAC, replaced all brittle, leaking vacuum lines, tried a new AMM, Cam and Crank Sensor. I tried cleaning the ECU contacts. I talked to a dealer tech that had the same exact issue, he said he was never able to fix it after also replacing every part he could think of except the ECU and also narrowed it down to the ECU.
The good news is that there are a ton of good used, pulled J9.2 ECU's, they seem to be the most popular as the J6.2's were probably a transitional thing then improved.
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