I also had some issue with the FP not starting with the MS - simply hard-wired the pump through a manual on/off switch controlling a relay - I wasn't gonna screw around with it and get a migrate. Hope you figure it out

Oh, really? I wonder why. I know that TS thinks it is being switched on. Maybe I can test the lead coming out of the MS harness with my multimeter and see what that tells me.

I'll do that right after I jump f/p to gnd and see if it cranks. I'd love to have it fire right up and let me know I'm on the right track.

Thanks! All support is welcome!

Car cranks up and runs fine when jumpered.

I've got to figure out what is keeping it from turning on with the MS.

Hmmm.

When looking at the picture below from your harness thread it appears you do not have the FP wire hooked from your ms to you stock harness. That would cause FP not to run.

https://www.miataturbo.net/attachmen...ine=1325354421
https://www.miataturbo.net/attachmen...ine=1325354421

Very good catch, but that diagram is actually incorrect as Brain knew and I figured out in the other thread. We probably need to redraw that diagram. The fuel pump switching circuit is a light green wire that is located a few pins over from where it is listed there. I've been learning my way around TS here for the last hour or so since it was running instead of chasing the F/P circuit problem down. But I need to see if the signal is getting from the MS to the car's harness. I'll check continuity first.

Fairly certain this happened to mine. I just jumped the f/p and left it heh. Wonder what the issue is.

Look at the purple wire I circled and then look at the spot that I circled that is open. If that purple wire is correct and hooked to ping 37 of the DB-37 then it is in the wrong spot on your yellow connector.
https://www.miataturbo.net/attachmen...ine=1326055249

I also checked the diagram that Braineack made against my 96 wiring diagram and he does have the FP wired to the right place on his document.

Thanks for the call and for looking out for me.
The harness pictured is how I received it and is wrong and has been changed. It was wrong and part of the posted diagram is wrong. The green FP wire enters into a different location on the 64pin (thanks Haynes manual) and the p[urple wire now goes to it but the MS doesn't seem to be switching it on. I used a heavy staple from my staplegun to permanently jump f/p to gnd in my diagnostic box. It sits flush and will work fine until any better solution arises. The high current side of the fuel pump relay is switched with the ignition anyway so this works fine.

The car runs fine except for a choke out when you first hit the throttle. I'm sure there is a thread waiting to be found regarding tuning this out, but it was a long time ago that I read anything about it. Much studying to do on it.

Did you move it to the pin lars circled?

I'll need to look when I get home what the pin location was. I am certain it had the light green wire on it, if that helps.

cause you really want the MS to control it. jumping the pump was so 2006, and exclusive to lazy 90-93 installers.

Well I need to see if the MS is sending out a ground signal to the purple wire, then.

Yup - that's me entirely :) but I wanted to add a cool switch with a little red light :loser:

Jump it - you're wasting time

Is this how you get all that time kamikaze diving into braking zones? hahah.

LOL! somehow this does not surprise me :giggle:

Sounds like words from a guy who rather stand around and drink beer watching some poor shmucks try to align their car in the middle of the night... :) lol

You missed that one Steve... I was quite the helper (I'm just getting too old to roll around on the ground)

I didn't help them either. I was too busy putting my Hawk pads on in the dark to try to help anyone else. Thankfully Lars was helping me. I had been up since 4am and was out of steam. And it was cold and windy out there. I'm lucky I got finished with my own car. I'll be more rested and social with you guys next time.

That reminds me of what we called the poor bastards that worked on their cars on bare ground. Dirt daubers. :giggle:

Is that what its called nowadays??

Dont worry about it six. We all have those days!

do what you gotta do man. we may have been rolling around freezing try to figure out alignment woes, but I put my fastest time down the next day. I think it was well worth it considering I shed almost 2 seconds.