14-06-2020, 04:15 PM
(14-06-2020, 03:35 PM)Mighty306 Wrote: Just had another thought. The XU10J4R came with 2 different sets of injectors. Earlier versions had 186cc injectors and later versions had 200cc injectors. If the ECU didn't come from the same car as the engine then they might not be a match. An ECU that thinks it has 186cc injectors but in reality has 200cc injectors wouldn't (from my understanding) be able to adjust the mixture to stoich. (The MP5.2 ECU apparently only has a very limited range of adaptation).
Hmm.. it could be the injectors then. The ECU I bought is this one (MP 5.2). The engine comes from a 1996 Xantia that had a Bosch MP 5.1.1 ECU. A bit of googling shows that the injectors changed 11/1997, so I guess it could be that my engine has the earlier injectors but my ECU thinks it has the newer ones. Would this have the same effect?