Goin' Megasquirt (My progress thread)

[photoeye0]

Update:

With the holiday in there I didn't get much time to work on it, but I did manage to get most of the harness routed.





The 2 red and white wires you see off to the side are for my EBC and the other few slung over the intake mani and for my igniter. I had the coils and igniter mounted, but my new (to me) GTX IC piping hit it, so now I have to remount them. I'm still not sure where I'm going to put them. With that all I think I have left to do is run all the powers to the fuel block, run the power to the fuel pump, mount the relays, and find a good ignition switched power source.

And yes I am going to loom the harness. I'm just going to make sure the car runs 1st.

BUT...I have a few questions again.
Where is the best place to tap in to a ignition switched power?
And am I missing anything?

[therieldeal]

i ran my ignition switched power from the same place that the stock ECU harness gets it from... in the engine bay fuse box.

[FE3-323]

white with red striped wire- anywhere from the original harness. BTW rick it looks alot better without the TMIC in there

[photoeye0]

Thanks and yes I'm happy to get rid of that stupid thing.

I also have to make some block off plates for the ISV stuff.

[mazdamp5]

subcriben

[Lex]

i ran my ignition switched power from the same place that the stock ECU harness gets it from... in the engine bay fuse box.

Same here, right off the 3 wire plug on the fuse box.

[photoeye0]

Cool thanks...I'll be working on it again tomorrow. I hope to try starting it by tomorrow night.

[photoeye0]

Got a little more done today!!!



Here's the bay. It still looks like a mess, but all the wiring should be done accept the boost controller. Hens to 2 small red and white wires slung over the booster. The 2 bigger red and white wires are the switched power and constant power. I still need to wrought them a little better.

I tried to mount the coils on the head next to the dissy but there is only one taped hole on the head that would work and with the charge pipe on there is not enough room, so I had to put them on the firewall.

The ISV is only on there so I can start it. I'll be making up some block off plates soon.



And here's how I mounted the MS and fuse block. I'm still not sure if I'm sold on it.

All I have left is to wire up the fuel pump, mount the intercooler, wire in the fan switch, and make the block off plates for the ISV stuff...I think.

[MD323]

looking really good, cant wait to see the car live again

good work

[XelderX]

Good thread so far guys. I'm trying to learn as much about MS as I can. I'll be purchasing one very soon. I'll be running a FS-DE off of it through a BP harness. Looks like I'll have my work cut out for me.

[FE3-323]

why are you using a seperate fuse for the MS?? there is a built in fuse (good enough to keep the stock ECU from blowing... id think it would be fine with that.

[photoeye0]

looking really good, cant wait to see the car live again

good work

Thanks. I hope to try starting to car soon.

Good thread so far guys. I'm trying to learn as much about MS as I can. I'll be purchasing one very soon. I'll be running a FS-DE off of it through a BP harness. Looks like I'll have my work cut out for me.

I would recommend buying a prebuilt harness. It makes to job way easer.

why are you using a seperate fuse for the MS?? there is a built in fuse (good enough to keep the stock ECU from blowing... id think it would be fine with that.

I'm using the wire from the stock fuse box to energize the relay in the glove box and I have an unfused 12v run though the relay to the fuse block. I did it that way because I don't like in-line fuses and I wanted to have all the fuses for the management stuff in one place (fuel pump, injectors, EBC, and CAS)

I'd like to even get rid of or hide the stock fuse box, but that's more work than I want to do now.

[XelderX]

I would recommend buying a prebuilt harness. It makes to job way easer.

I can't. The rules that I'm building the car for makes me keep the stock harness in the car. If it's there I might as well use it instead of adding more wiring.

[photoeye0]

I can't. The rules that I'm building the car for makes me keep the stock harness in the car. If it's there I might as well use it instead of adding more wiring.

OIC...Good luck.

[photoeye0]

I'm so close but this damn cold snap is killin' me. It's not going to get above 0 all weekend.

But I did some more work on the board. I removed my shift lights and pulled the boost controller. The FET I bought was the wrong one. And while I had the iron hot I pulled all of the VR and coil driver stuff. I saved the VB921 and I also grabbed my friends VB that he's not using. So if I have issues with the igniter I'll grab 2 more VB's and go COP or something.

Here's how it looks now...


The wire running up to where the VB use to be will be used for the boost controller FET and one of the 3 going over to the proto area is for my launch control and I have not idea what I'm going to do with the other 2.