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Hi everyone!! I have some great news for all L20ET owners & HR30 owners with L20ET engines...I know this is a very very very very rare engine! For the last year or so I have been looking for an L20ET wiring diagram, all I could of ever find close to it was the L28ET wiring diagram which didn't help me. After searching and searching and searching everywhere on the internet including all these kinds of forums, no one could of helped me. I have found the original L20ET wiring diagram!!! It's the same 3 jack ECU, its for the L20E & L20ET...Don't mind I forgot what I searched for in google, but I found it in google images and I cleared my history already, anyways I have the diagram THANK YOU JESUS! The only problem is that is in Jap/Chinese and I need it to be translated ASAP! I will post the diagram below and can someone please take it and translate it to english. I'm sure this will be very helpful to all the L20ET owners such as myself. W-12_HR30_L20E_L20ET_ECCS_1983.pdf I also have the complete diagram for the interior of the car also, that needs translating as well. Let me know if you need it. Please translate this 1 to english. Thanks!

This is a original L20E/L20ET ECU wiring diagram...I know some people have been looking for this and could not find it, I found it after a very longtime searching all over the web. I the good part is that it is in ENGLISH! So yeah, here it is, hopefully it will get popular around the internet so it can be easily found. People used to say the 280zx ECU is the same as this one...only some things on it is the same not everything. Nevertheless, this is the proper one. Enjoy!

Hi...i have a problem with my L20et engine...i got the engine from a buddy but the fuel pump relay and EFI relays are missing and don't know where on the ECU the wires for those relays are located...i wanted to know if you can send me a picture or a wiring diagram for this engine please or if you can tell me what pins on the ECU is the wires. Its the original 3 jack type ECU, its also an uncut harness, all the other wires are connected in place straight from the factory from years ago...I could be wrong in asking for this because I don't really know if the ECU controls the fuel pump relay & the E.F.I relay, but i've been looking at L28et diagrams and I saw these relays and thought that since the L20et & L28et are so similar they both should have the same components...but didn't know they had 2 different ECU setups Another thing I wanted to know is if the L20et works with a high pressure fuel pump because the engine isn't in an R30 Skyline, its in a C32 Laurel which originally came with an L24 Carb engine with a low pressure fuel pump which i swapped out with a RB25DET fuel pump. So I was just wondering if anybody can help me with this tiring situation. Thanks!