ecu loom 93

[Rangie]

Hi, I have a 1993 1800 import engine fitted to an early MGB. Japanese market engine had ecu loom cut at firewall. The Ecu was from a manual vehicle and is an 8 bit unit with two yellow input plugs. ECU code is BPF-3.Does anyone have such a loom, would a US aftermarket loom do the job or should I start from scratch and install aftermarket ecu etc. Any advice gladly accepted

[93_Clubman]

Welcome! Might be useful to add your general location to your profile in case there's someone nearby that can assist with a loom or access to a loom.
-To clarify, are you saying you've got the engine bay loom, but are after the loom from the firewall to the ECU including the plugs that plug into the ECU?
-Can confirm the BPF-3 ECU were JDM MX5 NA8 ECUs, while the ADM MX5 NA8 ECU was a BPF-6.
-There should be secondhand JDM OEM NA looms available locally for a very reasonable price.
-Alternatively, a number of other early to mid 1990s Japanese vehicles used the same 26 pin & 22 pin plugs used on the NA6 & NA8 ECU, so a trip to a wrecker to obtain the two plugs including their pigtails of wiring could be useful.
-IRCC, a US aftermarket loom may need repinning of a few pins.
-An aftermarket ECU & loom would be a more complex & expensive solution than using the OEM ECU. For example a Toyota 4AGE 20 Valve Silvertop or Blacktop ECU only requies a relatively small numbers of wires to run a Toyota 4AGE 20 Valve Silvertop or Blacktop motor, but not sure if this applies equally to the Mazda BP (1.8 ) ECU & Mazda BP (1.8 ) motor.
-If you opt for an aftermarket ECU, then the Speeduino would be a good option:
https://speeduino.com/shop/index.php?id ... er=product
You can read about the Speeduino here as the developer is on this forum & lives in Victoria:
viewtopic.php?f=57&t=68123

[bruce]

I would try to get another factory loom and ecu as it would be more difficult and expensive to go aftermarket.
Now the hard part is finding the matching factory bits.