The USDM intake manifold is also a great upgrade for its flow and efficiency as well as availability of aftermarket parts. The most important reason for these parts to match is because the electronic components change between the models so the USDM ECU would not know what to do with the JDM components like idle air control or the throttle position sensor. The rule of thumb here is ECU must match engine and this applies to the manifold and harness as well. However, in 1999-2000 the protocols for communication were different in Japan than in the North America so our scan tools and tuning software can't read the information because they were not designed to do so. Yes, the V5/6 models do have an OBD2 port that does communicate with the ECU. As byproduct of a communication difference it essentially renders the ECUs that come in these JDM models non OBD2 in our geographic region. They have an OBD2 Port right?Īlright, you caught us over simplifying. Wait, I thought the JDM V5/6 ECUs were OBD2. When it comes time to do repairs, finding parts can become difficult because in most cases the unique parts on the Version 5/6 engine have been discontinued and are difficult to come by in good usable condition here in the US. If you have any problems with the engine you can’t simply scan the code because of the non OBD2 platform.ĭue to lack of tuning capabilities of the OEM V5/6 ECU you will not be able to make the needed adjustments to new parts which only creates issues, not more horsepower. The version 5/6 ECU was non-tunable and non OBD2, so getting it to pass any kind of emissions or BAR is would likely be impossible. It's fairly straight forward to utilize the longblock with the mechanical changes described in this blog In it's stock form it would not plug in or run with in a USDM 2.0 WRX or with a USDM 2.0 WRX ECU in a non turbo to turbo engine swap situation All good but still the engine should not have been beat to shit on the outside and be all rusted to hell with the hole punched in the cover.Why would I want to modify my V5/6 engine? They don't warranty it tho it's considered a gift. If I swap the intake fuel rain and dizzy over and make adaptors for the injectors when vtec engages I'll run lean af with out a tune causing more issues so they need to send it with the required parts. I wish I could just swap over the parts and run it but my intake, tb, injectors, dizzy, valve cover, iacv are all different. In the past 12 month they have 18 bbb reports of the same issue I'm haveing right now. This company had been in business 18 years. I was so mad I didn't want to explain all of this over again. On top of all this the engine I received pics of is not the engine I received. 4 month watenty as long as I change timing an water pump. But the valve cover on the f23a isn't the same as a f22b2. They also busted off sensors and some other things witch won't be covered I could care less some parts on my engine will work. That day I called then they said they will replace it and oay for shipping now I hear nothing back. The shipping company won't take responsibility for dmg for some reason even tho they dropped it in the concrete and broke a quite thick pallet. The engine is claimed to be low mile and everything from pan to valve cover in good working condition. The engine should nit have damage and the oil pan doesn't just have a small dent it's several big dens to where it will leak. I'm going obd2a to obd2b I have a new harness and ecu.
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