Tagged: V8 VVTi wiring
April 3, 2018 at 9:06 pm #392
Hi Andrew, just picked up my chassis on Easter Sunday so it’s now in my garage on the rotisserie ready to start. Problem is I’m going to Italy this weekend so nothing will happen for a couple of weeks. Good luck with the engine.November 5, 2018 at 5:07 pm #403
Hi Andrew, any progress made? Can you send me your details and I will give you a call, I have some information that may be relevant. Cheers.November 11, 2018 at 6:57 pm #404
Hi Peter, sadly I’ve made no progress over the summer (had another project to do).
how are you getting on? You can call me on 07785 331182 if you like.
AndrewNovember 24, 2018 at 4:42 pm #407
Sad to say other priorities have meant that I haven’t done anything over the summer.
However, after chatting to Peter the other day, thought I would share a couple of pictures of my MX5 fuse box solution – basically a weather proof box fixed to the chassis.November 26, 2018 at 10:07 am #408
Thanks Andrew, that has just saved me the cost of a bespoke radiator, well done for thinking outside the box!
Peter.February 15, 2020 at 6:10 pm #478
After many months of no progress, I have at last made a start on getting the wiring completed. Ended up buying another Lexus ECU with matched key as this seemed the easiest way to overcome the immobiliser problem and have got the V8 to turn over on the MX5 key. Now trying to work out how to energise the fuel pump relay – the wiring doesn’t seem to match the diagrams I have.
Hopefully more updates soon.February 16, 2020 at 5:53 pm #479
A little bit of progress today, gave up with the MX5 fuel pump wiring and connected the fuel pump relay directly to the pump, so have fuel to the motor now.
then trial and error with the minimum connections to the ECU, sadly battery went flat before a successful start, however having read my documentation again, think I’ve identified the missing connection.February 20, 2020 at 3:40 pm #480
Hi Andrew, progress indeed. I contacted a man in New Zealand who is an expert in these engines, (Cartune NZ on youtube) lots of very informative videos, and he sent me wiring diagrams to make up my own relay box and identified all wires. You will have a FP wire and a FPR wire which run the Lexus pump. FP works the pump and FPR is a resisted feed to give a 2 speed pump depending on requirements of the engine. When running the Mazda pump both these wires are connected due to being a single speed pump. Also the Lexus doesn’t prime the system but just works when cranking and running. The standard Mazda wiring primes first but won’t run without the Mazda engine telling it to so I wired direct from the Lexus to the Mazda pump and it all works fine. I will be down at the NEC at the classic and Restoration show at the end of March with my part finished car along with Martin and Mick with two complete cars. It would be nice to catch up there.February 21, 2020 at 5:49 pm #482
Great idea to meet up at the NEC – will you be there on both Saturday and Sunday?February 22, 2020 at 4:50 pm #483
Major milestone reached, the engine now starts, sounds fabulous especially with no exhaust. Just need to make the wiring permanent now.February 24, 2020 at 3:40 pm #484
Excellent news Andrew, there’s nothing quite like a V8 without exhausts!!! I will be there Friday, Saturday and Sunday. See you then.April 14, 2020 at 6:20 am #489
Engine now wired up and most of the trouble codes cleared. I’ve been writing up a wiring guide which I’m happy to share.
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