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Mobius Build 3.0: we begin with the garage

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Old 06-07-2019, 10:38 PM
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In this thread:

Richard learns how a relay works

Richard receives advice from several sources, including youtube, most of which is correct in the right situation but maybe not exactly correct for right now

Richard learns his understanding of what the wires in his wiring harness do at key on is incorrect

Richard learns about ground-switched devices

Also in this thread:

Richard is working about 65 hours Mon-Fri, so car progress has to wait.

I get how things are supposed to work now. I will revert the wiring at the new fuel pump relay and jumper blue/red and red/white as described in the instructions. I've had those instructions from the beginning, but my incorrect understanding of what red/white does is the fundamental cause of all of my wasted time.

Also also in this thread (shameless teaser)

Planning to have tow vehicle news to report soon.
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Old 06-09-2019, 05:55 PM
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Wiring has been reverted to as it came. Instructions have been followed. When I manually ground the blue/red wire, the pump spins up. So far however jumpering red/white and blue/red does not spin the pump up at key on.
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Old 06-09-2019, 07:15 PM
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You don't have your priming pulse width set to zero do you?
Have not looked at your tune, just a guess. The pump will not come until cranking if prime is set to zero.
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Old 06-10-2019, 06:18 AM
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Originally Posted by Mobius
Wiring has been reverted to as it came. Instructions have been followed. When I manually ground the blue/red wire, the pump spins up. So far however jumpering red/white and blue/red does not spin the pump up at key on.
At this point you need to determine if the ECU is actually triggering the fuel pump. Easiest way to do this without un-doing lots of wiring is to unplug the new relay, un-jumper the OEM wires, plug in the old relay, and turn the fuel pump on in test mode. Once it's "on", you check for 12v at the blue wire on the rewire harness. If there's no 12v in that config, then the ECU is not doing its job. If there's 12v, fuckery is occurring and you should email me
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Old 06-10-2019, 11:33 AM
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Ok, will do.

For clarification purposes, nothing else on the car has been touched at all yet, this is the first thing I've done to the car and it's still the stock ECU.
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Old 06-10-2019, 12:34 PM
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Did you, at some point, have the red/white and red/blue at the OEM relay jumped AND have the OEM relay plugged in?
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Old 06-11-2019, 01:11 AM
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I can't see how. I didn't jump them until this past Sunday. At which point I jumped them inside the harness to OEM relay connector, which belies the possibility of it being plugged in.

I have been trying to go through the various things I did to see if I crosswired something at some point maybe, and sent voltage places it shouldn't go. I don't think that happened. Maybe. When I'm not just finishing up bullshit paperwork at 10pm I'll go run the test you propose. If that fails I'll swap ECU's, since I have the (ahem) good fortune of having both a pair of extra stock ecus and my MS3.
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Old 06-11-2019, 02:29 AM
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It's worth plugging the MS3 in at this point just for the diagnostic capabilities.
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Old 07-07-2019, 07:14 PM
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Ok. 80 hour weeks have impeded my progress, but I finally had time to visit the garage again today. Got the ECU swapped out for the MS3. New relay spun up the fuel pump first try. So I must have killed the stock ECU.

Once again with my car, once I did everything exactly as Andrew said to do it, everything worked fine.

Moving on, I'll get the DW300 in, then get the roll bar in, then get the gauges, LC2, and associated vac lines all put in, get the top back on and I'll be in a position to change the injector sizes in my current MS3 tune and start it.

This was good though, learned some things here. But I'm glad to be back into forward progress mode and not wtf is happening debug mode.

Also, I thought this was interesting: My car is most definitely an '01, but the ecu has a 2005 sticker on it:


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Old 07-08-2019, 01:27 AM
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Old 07-08-2019, 05:21 AM
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Originally Posted by Mobius
Also, I thought this was interesting: My car is most definitely an '01, but the ecu has a 2005 sticker on it:
Ok, what are the odds that that 2005 ECU is not the original, but somebody has blown an ECU and plugged that one in? That is, is there a wiring fault in your harness, and it is sitting there waiting for the next ECU to be plugged in?

Has the car been inundated? Especially salt water? Vandalised, or otherwise molested? How did the floor look when you took the ECU out? And how did it ever start without the ECU/immobiliser handshake (AFAIK this cannot be re-programmed?)?

I realise this is a new car to you, and the above questions may be unanswerable, but that date mismatch would worry me ...
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Old 07-09-2019, 11:40 PM
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NB ECU isn't on the floor, so he wouldn't know. It's most likely an early VVT recall which involved replacing the ECU at the dealer, who can reprogram the immobilizer, just not anymore AFAIK. Or it's stupid expensive, one of the two. Rumor is the ECU fix did nothing, we have a fix at our shop involving retarding the pickup wheel on the intake cam for over advanced codes. Regardless, an MS will solve any of those issues.
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Old 07-10-2019, 05:07 AM
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Live a little, learn a little! Never heard of VVT/ECU replacements (or maybe I've just forgotten), never knew dealers could reprogram the immobiliser ... I know the NB ECU is not literally on the floor, but a bad case of blocked drains will flood the floor in the worst case, wetting the connector at least.

Regardless, you are probably right.
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Old 07-10-2019, 06:16 PM
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Gee Emm, the LHD NBs have the ECU in a different place than us RHD'ers. Their's is mounted up under the dash next to the steering column. The car would have to be submerged for it to get wet.

For any that don't know, the RHD NB ECU is located under a kick panel, against the firewall in the passenger foot well, where it could conceivably get wet in the way Gee Emm describes. I think some LHD NAs had their's in a similar spot?
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Old 07-10-2019, 06:57 PM
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Well there you go, the learning never stops! Thanks ML!!
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Old 07-10-2019, 11:30 PM
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Yes, the best Miatas Mazda ever made, in '92 and '93 had it there. So did the 90-91s, but they weren't the best Miatas Mazda ever made.
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Old 07-11-2019, 11:51 AM
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Great job on garage!
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Old 07-13-2019, 01:25 PM
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Originally Posted by IanIsInTheGarage
Great job on garage!
Thanks. I knew what I wanted to do, and knew basically how I wanted it to look (aesthetically match the house) but all the credit for actual design and execution of that goes to the designer we used who drew up the actual plans and then the contractor that made it happen. If anyone in the Portland area needs similar work done I'll pass along their info to you. I don't think our designer has a web page but the construction was done by Lovestrand Construction.
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Old 08-17-2019, 09:28 PM
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Progress. Started the car today, drove it out to the street, turned it around, and back into the garage. This was significant and necessary because my driveway has a slope. I pulled the car in facing out to put in the rollbar. It needs to be facing in to swap the engine. If I had 6 guys, I could do it with people power. I'm sure I could have hired some of my installers for a few hours, but still. Maybe next time I will.

Thinking of keeping my current vac line routing for the MS3 permanently. What could possibly go wrong?











The "BEFORE" pic:

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Old 09-19-2019, 11:17 PM
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So you people probably want updates. Because that is what the internet is for, free entertainment for you.

I haz updates!

Before the pics, a status update on my attendance at 2019 MWLS. I will be there, with or without my car, unless work. I am still currently working 70-80 hour weeks. My ability to attend just depends ... I am currently the only sales guy (normally 3). The owner has been offline for about a month due to his mother dying. Which is all the sad things, condolences have been expressed, cards written, etc. It was not exactly unexpected but there's never a good time to have a parent die. The point being there's been literally no backup for me so I've been taking everything to try to keep the install crews working as much as possible. For those that don't know, I'm in HVAC now. I have the best job title in the world: "Comfort Consultant."

"Are you truly comfortable in your home? Do you have areas that run hot or run cold, that you wish to fix? Do you have areas in which your spouse is too hot, or more importantly, too cold, and you'd like to resolve that? I can help you!"

The owner's back now. Our other sales guy may or may not be back, we'll see. He had the misfortune of being sideswiped as he sat there parked. He was waiting for the proper time to roll around for him to roll up to his appointment, minding his own business, and blam he gets sideswiped. Not a lot of damage to the car but he's had previous injuries and the whiplash factor has laid him out. He's originally from the Boston area, so of course he's a Patriots fan. I signed his get well soon card last week "Patriots looked strong, defying age, at least somebody from New England's not a *****!" That's the nature of our office, good natured ribbing, I hope he's back soon. I have massaged paperwork procedures to take a lot of the pain out of it compared to before, but covering all our calls is still a load.

Anyway. Updates! I can report that my moneys spent on structural engineering were well spent. Not even a creak. Garage said BRING IT, and when the miata started to lift off the stands because of some reason or other that is unimportant, garage was ready for more.






[img] https://lh3.googleusercontent.com/ZK...A=w744-h992-no

















My car placement was spot on. Any closer to the front and the engine would not have cleared the workbench and front of the car coming up.

So. I have a 101k unopened completely stock unopened vvt engine, and 6 speed, available. Anybody interested let me know. Engine was completely fine stock, no smoke on decel, no complaints on revving. Previous owner put the Motorcraft in the transmission and Mobil1 in the engine.

Also: The TRULY observant amongst you will notice a difference in the hoist.
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