Halp! MS1 Harness Corrected! Fixed Errors But Won't Run
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I've been busy educating myself. But I've got a question...
I bought a MS1 from Rharris19 that was built by Brain. The harness between the DB37 and the 64pin connector had some mistakes so I am double checking everything. And I need some answers if you guys can help. (My car is a '96) https://www.miataturbo.net/attachmen...ine=1325354421 https://www.miataturbo.net/attachmen...ine=1325354421 https://www.miataturbo.net/attachmen...ine=1325354421 The fuel pump purple wire wasn't in the right place on the 64 pin connector. It was hooked to the purge solenoid circuit, so I moved it to position 1U and verified the correct color wire on the vehicle side. https://www.miataturbo.net/attachmen...ine=1325354421 I also moved the little jumper wire for the A/C circuit from position 1Q to position 1K and verified the wire color and vehicle wiring diagram on the vehicle side. Now I wanted to double check the DB37 since a couple of things were incorrect on the 64 pin side. The colored wires all seem to be correctly located. The grounds do not per your pinout diagram. https://www.miataturbo.net/attachmen...ine=1325354421 The shield is not grounded at all. It is definitely not hooked to pin 2. There is a black (I assume ground wire) connected to pin 3. There is a black (I assume ground) wire in positions 9-10-11-12-13. But not 7-8-9 and 17-18-19 like you have pictured here. Is this wrong or was it done correctly due to some running change and the diagram wasn't updated? I was worried because of the other errors in the other end of the harness. Thanks guys. Steve |
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I thought these pics may possibly be useful as well:
https://www.miataturbo.net/attachmen...ine=1325359015 https://www.miataturbo.net/attachmen...ine=1325359015 |
Are you sure it is for the right year. Even between 94-97 there are a lot of changes in the wiring. Also if I'm not mistaken a few of those diagrams are wrong. If it's right on the DB37 side, and wrong on the other, I'm willing to bet either your diagram is wrong, or it is for a different year.
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Originally Posted by FRT_Fun
(Post 813418)
Are you sure it is for the right year. Even between 94-97 there are a lot of changes in the wiring. Also if I'm not mistaken a few of those diagrams are wrong. If it's right on the DB37 side, and wrong on the other, I'm willing to bet either your diagram is wrong, or it is for a different year.
It really is the DB37 side that has me pretty concerned now. If Brain built the MS and the ground wires on this DB37 don't match his schematic then I might have a problem. I can't have been the first one to have bought a Brain built MS1 so I'm hoping someone has an idea (PM'd Brain early this morning but he hasn't been online). I'd like to get this thing running over this long weekend if possible. |
Originally Posted by sixshooter
(Post 813376)
I've been busy educating myself. But I've got a question...
The fuel pump purple wire wasn't in the right place on the 64 pin connector. It was hooked to the purge solenoid circuit, so I moved it to position 1U and verified the correct color wire on the vehicle side. I also moved the little jumper wire for the A/C circuit from position 1Q to position 1K and verified the wire color and vehicle wiring diagram on the vehicle side. The shield is not grounded at all. It is definitely not hooked to pin 2. There is a black (I assume ground wire) connected to pin 3. There is a black (I assume ground) wire in positions 9-10-11-12-13. But not 7-8-9 and 17-18-19 like you have pictured here. Is this wrong or was it done correctly due to some running change and the diagram wasn't updated? pins 1&2 & 7-19 are all grounds. Besides the two wires you fixed, everything else looks good. I absolutely built it, dont worry. |
Originally Posted by Braineack
(Post 813476)
Good catch on that. I had built my first few 96-97 harnesses based on a bad diagram I pulled off the net. those were the two pins in question.
I don't know if I still need to use Easytherm or if the values are already present in the basemap for the GM IAT sender that came with the MS (he had never installed or run this MS).
Originally Posted by Braineack
(Post 813476)
Not a ground, it connects to that circuit on JS0 on the board. Just a spare output circuit is what it looks like--where does it attach on the oem harness?
Originally Posted by Braineack
(Post 813476)
Besides the two wires you fixed, everything else looks good. I absolutely built it, dont worry.
Thank you very much for your patience and help. Who drew the 64pin diagram? If I had a program to redraw it properly with the number 1 and number 4 connectors flipped I would. It really screwed me up for awhile. The fan control pins are on the outside edge of the 64pin instead of toward the middle as shown in the diagram. And the number 4 connector is situated with the injector outputs toward the outside of the 64pin and not the inside as is shown. I don't think Paint would be a good program for me to use for it, lol. Maybe an Excel sheet would work out. |
I drew it that way because that's the way the pinouts are always displayed in the manuals.
But we like to look at them on the other side, so it's all in reverse. if you want them in excel, try this: http://www.diyautotune.com/diypnp/ap...7-18bp-mt.html |
Originally Posted by Braineack
(Post 813607)
I drew it that way because that's the way the pinouts are always displayed in the manuals.
But we like to look at them on the other side, so it's all in reverse. if you want them in excel, try this: http://www.diyautotune.com/diypnp/ap...7-18bp-mt.html |
Unless you need to change the firmware, it's going to be good to go.
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Thank you so much! I will update on the progress.
I guess it is time to start a real build thread. :) |
Crap. One of my 460's is hung open. It tried to crank and sputtered a bit. When I pulled number 3 plug out it was soaked. I pulled the injectors and I can blow air through number three. :(
I guess I send it back to DeatschWerks and see if they can do anything with it. It sat in a box for about 2 years after being cleaned so I guess it is bound to happen to a certain percentage of them. Disappointing for sure. I guess I could either try a basemap that will work on my stock injectors or be patient in the meantime and let it sit. It would be smartest to leave it alone and fix the injector I guess. |
Throw in your stock injectors, change required fuel and run with it.
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Originally Posted by shuiend
(Post 813694)
Throw in your stock injectors, change required fuel and run with it.
I may reinstall the stock injectors tomorrow and try it. I need to get familiar with the MS software anyway. Hey, here's a quick question I'm going to have to look up next: If the req fuel is set up for 460's do I just reduce whatever the number is by the percentage of the size difference to the stock 265cc (I think that's what comes in a '96)? I think that is what I remember but I'm going to go searching for the answer in a minute. |
Originally Posted by sixshooter
(Post 813711)
I thought about it. I cleaned everything up for tonight and boxed up the 460 injectors. I'm going to have Deatschwerks go through all of them again as a preventative measure. I don't want to f anything up when I start adding a little positive intake pressure later on.
I may reinstall the stock injectors tomorrow and try it. I need to get familiar with the MS software anyway. Hey, here's a quick question I'm going to have to look up next: If the req fuel is set up for 460's do I just reduce whatever the number is by the percentage of the size difference to the stock 265cc (I think that's what comes in a '96)? I think that is what I remember but I'm going to go searching for the answer in a minute. |
Originally Posted by shuiend
(Post 813796)
There is a place in the fuel settings where you enter the size of the injectors, along with engine displacement, and the number of cylinders. Then it will rescale the required fuel for you. Everything else should scale properly.
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Originally Posted by sixshooter
(Post 813886)
In TunerStudio? I think I was looking in the wrong place.
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I worked on this for a few hours earlier before I figured out, "Hey wait a minute. My base tune's req fuel was at 13 when I opened it. That's a 265cc injector req fuel isn't it? I was told this had a basemap for 460's in it already. That means I'm barking up the wrong tree." Is this right?
After figuring that out I tried to get it to run with the base map that was in it on the stock '96 injectors but it wouldn't work. It actually ran better with the 460's (on 2 or 3 cylinders) with one injector hung open and flooding out. I wonder what this map is for? Brain, do you have a msq that will likely work with the 265cc injectors with the way this MS is built? I deleted the MAF. Edit: The msq that was in the MS is now attached. Please look at it and tell me what I'm doing wrong. |
Please look at my msq.
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Did you even try to alter your REQ fuel? I opened your tune up and it wasn't configured correctly. Did you do what Lars told you to? And your REQ fuel should be something like 6.6 with your injectors. If your map is scaled off of bunk settings, you're just wasting your time messing with the tune.
BTW, if you wind up needing new injectors, I got the hookup. |
Originally Posted by tasty danish
(Post 815129)
Did you even try to alter your REQ fuel? I opened your tune up and it wasn't configured correctly. Did you do what Lars told you to? And your REQ fuel should be something like 6.6 with your injectors. If your map is scaled off of bunk settings, you're just wasting your time messing with the tune.
2nd question for you, is this set properly for MAF delete? I think it is because it said something about speed density algorithm but I'm having trouble being sure. |
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