Need help IDing Year of my ECU.
Hey guys! New to rx7 club I'm not new to rotaries. I imported a JDM engine to swap into my 94 rx7. I've been running it pretty solid after rebuild for a year and a lot of replacement parts, I'm looking to buy a power fc right now and I know they run In series. I believe I need the 96-98 , series "5" or "1" depending on who your talking to, I'm not 100% sure on the year of my engine that's why I'm here asking if there's a way to ID the year from ecu, for starters it dosent have the plastic crossover crap, Efini Y pipe that's why I'm shooting at 96-98, any info on this would be great.

 

Did you use the JDM engine harness and ECU when you swapped it into your 94?

 

I did, jdm harness , used rx7 club on wiring Auto dash harness to jdm manual ecu ext. this site is very helpful,, I've been using rx7 club just for info I just never made an account, I was doing research and I tried running numbers on ecu to find a year but I'm completely unsure, I just want to know what power fc I should buy that will be compatible with my engine, it didn't come with a black cross over plastic tube came with black compression tube and Efini y pipe, metal crossover tube, from my understanding the usdm had black crossover tube, so I was thinking it needs the series 1 "year" (96) they started making power fc or "5" 96-98 power fc, the engine came from Japan 40000km from a wrecked FD had 95- compression on all faces, we replaced seals anyway. I'm just looking to buy A Pfc and the one I need, I just removed air pump because I don't have cats, idle pulley ext ext I know I need the standalone before i run it and for injectors, so this is where I'm at.

 

Are your ecu plugs yellow or white? Thats literally the only peice of information that matters. All the engine parts are interchangeable so thats not really a definitive factor when trying to figure out what year an engine is.

 

Yella

 

When shopping for a power fc, buy any one that will work in a usdm fd. If you can see the plug side then the ports are rectangular. The newer version power fc has more squarish plugs and will not work with your car.

Regardless if your engine came out of a 2002 spirit r or a 1992 base model has no bearing, what matters is the harness. Yellow plugs and white plugs. Yellow is the older and white is the newer.

 

Arigotou I really appreciate that information maybe it just had the later year parts put on it, I see what your saying with the size plugs ext, 96- has way more boxier harness connectors, I just remember wiring the JDM harness x14 to auto usdm dash harness, thinking that it's a Japanese motor the plugs might be different because of year, I wasn't entirely sure so I came here for great info! I'm curious tho since I swapped the Japanese engine harness in with connectors would I need a Japanese earlyer model power fc or it dosent matter and I can use a usdm power fc?

 

u need zenki power FC

 

Without cracking open the Japanese catalogs, I can tell it's an early 1992 build with a manual transmission, Revision C. N3A8 is the automatic version. It would be a Zenki FD, Version 1. Version 2 is late 1992/early 93, Version 3 is late 93 through 1995. Then it goes into Series 7 with 16-bit ECUs for 96-98

 

To answer your question, no. Since you managed to figure out a way to repin the jdm white plug harness to work on yellow plug harness then it works just the same as if it were a native yellow plug harness. If I am understanding you correctly. Or did you have a jdm white plug and swap the harness for a jdm yellow plug? Either way, Proceed as if you never modified anything. As far as the car is concerned it thinks its a 5sp from 1994.

Since you understand the visual difference in the ecu plugs, all you need to get going with your power fc decision is the visual conformation that the plug shape is correct and if buying used that it actually works. Apparently people knowingly sell bad power fcs.

 

I just labeled everything on x 14 and made my own adapter. you've been really great on info battousai really apprciate the knowledge, I may have some more questions for you in the near future, I would not ever buy an ecu used, I'm looking for a new one no worries on that. So pretty much any 93-95 power fc will work fine in theory?

 

lolollolol only a few people get the avatar but yes. i know i answered you in pm but for others that may come across the thread... not even in theory, in practice. any 93-95 power fc will work in your car if you have yellow plugs at your ecu