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ECU Replacement for 2004 rx8

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Old 06-12-2018, 08:34 PM
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ECU Replacement for 2004 rx8

So I'am fixing up an rx-8 that has given me trouble since i got it without an engine. The first engine we installed tryed to start up and the everything was fine except the engine with its low compression. Now we took it out and managed to get another engine which was in a crashed rx8 2004 however, i connected the battery terminald wrong and the clutch lost its pressure so now the car wont even try to turn on...we suspect the computer got blown (i also got a new starter for the car) but I replaced the computer N3H6 18 881E with N3H6 18 881K
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Old 06-12-2018, 08:36 PM
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Its not even trying to start up so might it be the computer isnt compatible? I'am ordering one N3H6 18 881E so that i can rule that out but before that ill fix the clutch pressure
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Old 06-12-2018, 08:41 PM
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i have an 881j sitting in my garage. its from an 04 m/t. i think swapping any ecu will need reprograming by a dealer but not 100% sure
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Old 06-12-2018, 10:39 PM
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Ouch so actually ima just leave in the original and fix the clut h since we opened up the ecu and it didnt look fried at alll
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Old 06-12-2018, 10:48 PM
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what do you mean theres no clutch pressure? it has nothing to do with the battery or ecu. first start by checking that the pedal bracket isnt broken, its a very common issue. i think mazda has a tsb on it. a few vendors sell a re enforcement bracket for the pedal but its easier and cheaper to take it out and weld it. if the pedal is good check the slave, its a pita to bleed
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Old 06-13-2018, 04:32 PM
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So before we changed clutch slave cylinder the pedal would go back up when we pressed it like normal now it just switches all the way down or all the way up we preety much couldnt bleed it
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