john Venables-kyrke Posted August 6, 2011 Report Share Posted August 6, 2011 I've got two 44S ECU's for a 01 WRX at home, just want to know what the firmware versions are for the two. First one has: subwrx2k 150402, slave2kc 150402, and s01wrxf code 775 written on the chips. Second one has: subwrx2k 031202, slave2kc 031202, and s01lagwx 775 written on it. Are there any firmware updates available for these two? Another query, the second one of the two listed has an intermittent misfire issue, I've traced it to number 4 cylinder injector not getting a full signal from the ecu, I oscilloscoped the signal and it only showed around 7v from memory. It seems likely to be an earth problem, but the other 44S in the same car is fine, no issues so I'm not sure. Quote Link to comment Share on other sites More sharing options...
Simon Posted August 15, 2011 Report Share Posted August 15, 2011 The only difference between the two is that one is geared as a motorsport ECU and has anti-lag. As far as controlling the injectors both should function the same. Chances are it will be a hardware problem on the board. Quote Link to comment Share on other sites More sharing options...
john Venables-kyrke Posted August 16, 2011 Author Report Share Posted August 16, 2011 How hard is it to swap the processors over to the good board? And the faulty board was looked at by Link early this year and no fault was found. Also, firmware? any updates available for these two? Quote Link to comment Share on other sites More sharing options...
Cameron Moore Posted August 16, 2011 Report Share Posted August 16, 2011 Hi John, You can just swap the micro's over, just be careful not to damage the socket, there are special tools available that make it easier. If there's no fault with the board it could be a bad connection in the loom, maybe some contact cleaner for the injector plug and ECU plug? There are no later updates than the ones you have i'm afraid. -Cameron Quote Link to comment Share on other sites More sharing options...
john Venables-kyrke Posted August 17, 2011 Author Report Share Posted August 17, 2011 Ok, cheers, probably just swap the antilag chip over to the known good one then Thanks Quote Link to comment Share on other sites More sharing options...
john Venables-kyrke Posted August 17, 2011 Author Report Share Posted August 17, 2011 One last question, can the 44S be run with a temp sensor in the inlet manifold? or is that a no go? Quote Link to comment Share on other sites More sharing options...
Simon Posted August 17, 2011 Report Share Posted August 17, 2011 In all reality the correction available one these old ECU's for IAT is average at best. You could move the sensor but its not going to offer any gains. Quote Link to comment Share on other sites More sharing options...
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