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  1. MKIII (1986.5-1992)
    Okay so I'm new to this and before I get flamed for "not using the search button" I haven't found any topics regarding my specific question. I have an EMU black with a prewired harness connector for the stock harness. I have added a walbro 255 fuel pump and 550cc injectors i am also upgrading...
  2. MKIV (1993-1998)
    Below is a picture of my ECU. I just got my JDM Mark IV Supra about a week ago and I’m still trying to figure out what all it’s got done to it. Short story. What ECU is this? I couldn’t find anything in the competizione brand and I need a wire diagram. Long story: I have a gen 4 HKS EVC that...
  3. MKIII (1986.5-1992)
    This is for people who can make p&p harnesses. I have an auto 1jz vvti in putting in my 90’ mk3. I haven’t found any companies who offer auto harnesses capable of hooking up to a standalone. Is there anyone on here that may be able to do that?
  4. New Members Forum!
    So I have an automatic 1jz vvti going into my 90 mk3, I’m keeping the transmission but I’m having difficulties finding a company that makes a harness or p&p harness that will hook up to a standalone. I know some websites like Supra Store allow you to make a custom harness but I’m not looking to...
  5. MKIV Technical
    Hi, here is my problem, after upgrading my fuel system (dual pump on a the radium hanger), I could not power up the fuel pumps. Finally I was able to find that my EMS pin A24 (output 12v for the main relay) gives me nothing. The pin A1 does get the 12v input. So I figured my EMS is not working...
  6. MKIV (1993-1998)
    My problem is simple I can't bother with the immobilizer from a gs300 ECU so I thought id just buy a gte vvti ecu (without immobilizer) for my car. Will it work? Thanks
  7. MKIV Technical
    Hi does anyone have the wiring diagrams/ecu plug pinout for a 2JZGTE non vvti apexi power fc? I’ve honestly looked everywhere and can’t find them online
  8. MKIV Technical
    2jzgte non vvti Just needing some answers around running coil on plug, with a microtech lt16c ecu and external X6 igniter. Is it possible to run coil on plug with my aftermarket microtech and igniter? I understand people use coil on plug to delete the factory igniter, but I have these genuine...
  9. MKIII (1986.5-1992)
    Can anybody explain what the Stock ECU does when you have the AFM unplugged? Like what is it doing with fueling and timing and such. Car runs terrible with AFM plugged in and vacuum around -15. unplug it, Idles great, Vacuum and AFRs are good/on the rich side. Plug AFM in it dies/ will not stay...
  10. MKIII Technical
    How’s it going everyone? I’m upgrading my fuel system on my 1.5jzgte mk3 that’s currently on 440cc grey injectors around 400hp (haven’t dyno’d recently) on the stock 1jz ecu with an apexi neo but need help with choosing the right injector and stand-alone ecu set up. It’s a 2jzge non vvti bottom...
  11. MKIII (1986.5-1992)
    Hello everybody I'm new to the Forum I I am a technician by trade but haven't really worked on much old stuff I have a 1988 Toyota Supra that I recently acquired ran and drove really really good for a while I let sit for a couple days and now I can't get it to start I've pulled the check engine...
  12. MKIII (1986.5-1992)
    I was wondering if anybody here has personal experience swapping their 7mgte for a 1uz. For a little bit of background I have a 87 MK3 with a 7mgte auto trans. I have a r154 and plan to use that so it can be manual. And an LSD 3.73 rear. I was wondering if anybody can give me a heads up of what...
  13. MKIII Technical
    Cranking not starting. Determined it was fuel system related. Not getting switching voltage to my EFI Main Relay, jumped pins 4 and 2 and the car started. Guessing it’s my ECU because the switching voltage comes from the ECU directly. It’s a 1987 mk3 with a 7mge.
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