Finally got a MS, have wiring questions
So I bought an MS 1 with a 3.0 that was off of a running a 97 miata, but I have some wiring issues. The car it came off of was using a parallel setup, which is the way I will be using it. I had a boomslang harness made for my 99 and the wires are as follows...
1) 12V 2) IAT 3) Knock 4) Gnd 5) Coil 2 6) Injs 2&4 7) CLT 8) Gnd 9) TPS 10) Coil 1 11) Injs 1&3 I read the wiring diagram for the DB 37, and am confused a bit as to what goes where. I have DB37 pin 20 to my IAT, pin 21 to my CLT, Pins 32 & 34 to my injs, but as far as my grounds and my coils...what pins to I wire these to? I am going to install a NA CAS, what pins do those wires go to? The NA CAS has 4 wires coming from it...if I'm not mistaken, 2 should go to MS, 1 is a 12V, and the other is a Gnd. Where can I get this sensor, preferably with a pigtail? |
Forgot...Brown analog wire from my LC-1 is on DB37 pin 23, correct?
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that's an awesome image.
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That is an awesome image...so on my boomslang, there are 2 injector wires. 1 for 1&3 and 1 for 2&4. I spliced them with DB37 pins 32 and 34. So the 12v from 1B on my factory harness goes to DB37 pin 28? What pin or pins on DB37 do I splice my coil wires to?
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See on the second image where it says "COILS"? One says "COILS 31" and the other "COILS 36" the number is the number to hook to on the DB 37. So coils go to DB 31 and DB36.
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Originally Posted by thirdgen
(Post 303840)
I read the wiring diagram for the DB 37, and am confused a bit as to what goes where. I have DB37 pin 20 to my IAT, pin 21 to my CLT, Pins 32 & 34 to my injs, but as far as my grounds and my coils...what pins to I wire these to?
Grounds... Pin 2 and pins 7 through 19 are all grounds. Pick five or six of 'em and run heavy ground wires to them. Connect a couple of them to your boomslang grounds (3A, 3B, 3C) and run the others direct to the head. You don't have to connect every single ground pin, but you can never be too well grounded. Coils... This actually changes depending on how whoever built your MS wired the spark output drivers. The "officially sanctioned" method is for SparkA to hit pin 36, and SparkB to hit pin 31. If you use an NA CAS, and set up your wheel config as DIY suggests, your spark outputs will be "backwards" (relative to common logic) so SparkA will drive coils 2&3, and SparkB will drive 1&4. I am going to install a NA CAS, what pins do those wires go to? The NA CAS has 4 wires coming from it...if I'm not mistaken, 2 should go to MS, 1 is a 12V, and the other is a Gnd. Like SparkOut, CAS in pinout varies with whoever built it. The usual standard is CKP at pin 24(Techin), and CMP at pin25 (IAC1A). Wire color at the CAS pigtail: W/R = +12 B/LG = GND W = CKP Y/L = CMP Where can I get this sensor, preferably with a pigtail?
Originally Posted by thirdgen
(Post 303841)
Forgot...Brown analog wire from my LC-1 is on DB37 pin 23, correct?
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So I finished splicing my DB37 to my boomslang except for 1 wire, the knock sensor wire. Does that go anywhere from my Boomslang to the DB37? I have 6 wires left on my DB37...pin 24 and pin 25 which are for my CAS, pin 23 which is for my LC-1's brown analog wire, pin 27, pin 29, and pin 37. Where do those last 3 go?
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Originally Posted by thirdgen
(Post 304036)
So I finished splicing my DB37 to my boomslang except for 1 wire, the knock sensor wire. Does that go anywhere from my Boomslang to the DB37? I have 6 wires left on my DB37...pin 24 and pin 25 which are for my CAS, pin 23 which is for my LC-1's brown analog wire, pin 27, pin 29, and pin 37. Where do those last 3 go?
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So aside from the CAS...that looks like it. Thanks for your help guys.
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Originally Posted by thirdgen
(Post 304036)
So I finished splicing my DB37 to my boomslang except for 1 wire, the knock sensor wire. Does that go anywhere from my Boomslang to the DB37?
pin 27, pin 29, and pin 37. Where do those last 3 go? 37, as Pats' said, is a dedicated FP wire which you will not use. |
Originally Posted by Joe Perez
(Post 304191)
Pin 37, as Pats' said, is a dedicated FP wire which you will not use.
Or does the above quoted text only apply to PNP? |
Originally Posted by kenzo42
(Post 313321)
What triggers the fuel pump if you don't have pin 37 connected and NO AFM present? 91 parallel DIY install, btw.
Or does the above quoted text only apply to PNP? |
Originally Posted by Matt Cramer
(Post 313629)
Absolutely nothing - you must have one or the other connected.
unless you jump FP and GND in the diagnostics box like us lazy folk. |
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