megasquirt wiring, homemade harness?

[ryan1]

here is a little write up i did about my megasquirt wiring, thats going into my 88 GTX.
before i wire this up and do my wire tuck i want to make sure this looks correct,so tell me if this looks right or wrong???

also my mega will run with no vaf/vam, has a internal ignitor,iac control, and launch control

MEGASQUIRT WIRING FOR BP ON A DB37 CONNECTOR ON A HOMEMADE HANRESS.

**********************************
WIRE COLOR = FUNCTION = DB37 PLUG
**********************************
BP DIZZY
Y/G = HOME = NOT USED
W = TRIGGER = PIN 24
W/R = POWER = 12 VOLT SWITCHED
B/G = GROUND = PIN 18/19

BP 4 WIRE TPS
G/R = +5 VOLT = PIN 26
G/W = THROTTLE % = PIN 22
B/W = GROUND = PIN 18/19
R/W = IDLE SWITCH = NOT USED

GM IAT (INTAKE TEMP)
PIN 20
GROUND = PIN 18/19

GM CTS (COOLANT TEMP)
PIN 21
GROUND = PIN 18/19
MAZDA CTS (COOLANT TEMP)
BL/W = SIGNAL = PIN 21
B/BR = GROUND = PIN18/19

MAZDA/FORD BP FUEL RAIL FITTING HIGH IMP. INJECTORS
INJECTOR 1 & 4
Y/B ON INJECTOR 1 AND Y ON INJECTOR 4 = SIGNAL = PIN 32/33 PIN 32 AND 33 ARE TIED TO 1 WIRE COMING IN
INJECTOR 2 & 4
Y ON INJECTOR 2 AND Y/B ON INECTOR 3 = SIGNAL = PIN 34/35 PIN 34 AND 35 ARE TIED TO 1 WIERE COMING IN

BP IAC (IDLE AIR CONTROL)
BL/O = SIGNAL = PIN 30
W/R = POWER = 12 VOLT SWITCHED

BP COIL
THICK BLUE = POWER = 12 VOLT SWITCHED
Y/B = NEG = PIN 25? OR PIN 36?

[ryan1]

BP COIL
THICK BLUE = POWER = 12 VOLT SWITCHED
Y/B = NEG = PIN 25? OR PIN 36?
***********************
lex told me its pin 36

[ryan1]

a have nother ? i hope i can get answered.
im running a diy harness from diyautotune.com, this one http://www.diyautotune.com/catalog/1...eady-p-43.html

it states that grounds are pin 7-8-9 and 17-18-19

1. so do i run all those grounds(7,8,9,17,18,19) to 1 grounding point?

2. should i ground all my sensor grounds(dizzy,tps,iat,cts,and iac) to 1 grounding point?

3. also should i tie both groups of grounding wires together in 1 spot?

[Krono]

Is this MS1 or MS2? What version PCB?

I'm running MS2 with PCB3.0 and pins 8,9,10,11 and 18 are grounds and mount to the block.

CLT, IAT, and TPS grounds run back to pin 19.

[ryan1]

Is this MS1 or MS2? What version PCB?

I'm running MS2 with PCB3.0 and pins 8,9,10,11 and 18 are grounds and mount to the block.

CLT, IAT, and TPS grounds run back to pin 19.

ms1 v3

[Krono]

Yours will be the same then.

Look here http://www.megamanual.com/ms2/V3assemble.htm#ew

[ryan1]

do you guys run a dedicated 12 volt switched to the coil, does it need it?

cause my plan was to get my switched 12 volt for the injector,iac,dizzy and coil all from 1 switched 12volt wire from the under the dash ecu plug.
that 12 volt wire is 12 or 10 gauge and i would be running 16 gauge wires from all(inj,iac,dizzy,coil) to it, or would i be better off running my coil off a different 12 volt, solely for the coil only?

[Lex]

Give the coil a healthy independent 12V. It will also reduce overall noise in the system. The thick blue wire in the stock harness going under the dash is a good place to start.

[ryan1]

Give the coil a healthy independent 12V. It will also reduce overall noise in the system. The thick blue wire in the stock harness going under the dash is a good place to start.

cool, that was the plan, the bf's also have that thick blue wire like the bg's.