While this is generally OK for hall sensor use, our VR sensors output a far lower signal at low engine speeds and are far more susceptible to noise. This terminal is also grounded to the engine block. 1 ecu from bosch (Code 402) and have only been able to find wiring diagrams for the similar 3. 00 38NPT-Bung_A: Aluminum bung for IAT sensor (Also available in stainless steel) $6. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. I double checked my wiring and everything is still hooked up correctly. RX7 Series 2 13B Turbo. Found it relatively cheaply at 4K. Standalone engine management system based on Megasquirt MS3x Processor and firmware with enhanced inputs and output ports in sealed enclosure and sealed automotive connector. Colors shown are for factory wiring harnesses. Pelican Parts Forums > Porsche Forums > Porsche 911 Technical Forum: MS3X sync loss problems1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. MS3Pro EVO Standalone Engine Management System w/ Harness. Wire the distributor’s VR sensor to the HEI module VR inputs. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. On the diagram, it shows only one wire coming for the harness, I assume the other wire will be the keyed positive. 5 out of 5 $ 114. Terminal Type: Pin. I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. ,230/232 @. Color coded wiring. Long TXL High-temp Wire, Heavy-duty DB37 Metal Hood, RFI/EMI Shielding, for use with MS3X Expansion Board, Each See More Specifications. To access the remaining two connectors on the wiring harness you need to move over to the driver side and discconect them. This only applies to the MS3X outputs (or on an MS3-Pro); the LED spark outputs use the same pattern as MS2/Extra so as to make it easier when upgrading from MS2 to MS3. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . Pins 19 through 14 should remain bundled on an adequately sized ground wire to the engine block. Probing the sensor on a V3. 57 – The MegaSquirt 3 is a drop in daughter card that greatly expands the MegaSquirt’s functionality. You will be using the MS3X Ignition Drivers NOT the Mainboard drivers. 99 JimStim-C: Assembled JimStim diagnostic board $17. Distance. Wiring harnesses at carid. All you are doing is connecting the OEM plugs to the FlowForce harness. 00 StimPower: JimStim power supply $83. 99. Anyone onto the questions. ‘Optional’ MegaSquirt Relay Board – Assembled Unit. 3. Hardware manual covering specific wiring and configuration of your Megaquirt MS3X/V30 ECU. 9 Magnum. 0! Perfect for your motorcyle, snowmobile, or personal watercraft! Or control your auto trans. 00. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. I bought a de-pin tool so I can repin my DIY harness and have done it exactly as shown in the first diagram (ms3x) - with each sensor getting a ground wire. On a V3. 99. I am getting ready to purchase a MS3X Kit, I just wanted to get anyone's ideas of anything I have missed. 3 Wiring Harness The Megasquirt can be supplied with a "pigtail" wiring harness to form the basis of your own wiring. I even pulled the Ms out and made sure the jumper was installed for the cam input. -. COPs are from Toyota Highlander with 350 ohm input resistance. 2 Soldering or crimping; 3. MegaSquirt MS3X Wiring Pigtail - Length = 24" 24" of TXL High temp automotive grade wire. There are no reviews yet. More expensive standalone systems also. by 87ponygt » Wed Dec 30, 2015 3:22 pm. 411 subscribers. 57, put main board JP1 in the 1-2 position and J1 in the 5-6 position. 5 out of 5 $ 114. 2. 99. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . To make sure you can't accidentally switch the upper and lower harnesses, the MS3X harness uses a male DB37 connector instead of a female one. Engine Management Systems. 99 Add to cart MegaSquirt 3 ECU with MS3X Expansion 5 out of 5 $. MegaSquirt DIYAutotune SystemsI have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. 57 mainboard as it uses the same driver as the MS3X. 6. This article does not apply to LM1815 circuits, such as the Zeal daughter board. 0! Perfect for your motorcyle, snowmobile, or personal watercraft! Or control your auto trans. I've gotten the truck running great and was pleasantly surprised with the motors performance. Ok. The MS3 and MS3X do not put out enough juice to fire the factory coils, unlike the Chevrolet Coils which have built in ignitors,. This is a shorter version of the harness for the MS3X Expansion board. 2 Megasquirt Installation; 2. Wire to pin 8 for 1G and 2G MS3X connector: pins 2, 3, 8, 12, 17 Wire with your grounds from the mainboard pin 4 Injector F output (cyl 6) Wire to pin 16 for 1G and 2GRe: MS3+MS3X and the EEC-IV adapter board Post by xrattiracer » Sun Mar 28, 2010 5:50 am what exactly would be the point of using a ms3x with the stock ford harness? you would have to add all sorts of extra wires for the extra functions anyway. Add to wishlist. 0 MicroSquirt with 30″ Harness is an entry-level, fully assembled ECU and universal 30″ pigtail with varied applications targeting power sports, single cylinder all the way up to 8 cylinders. 60. The MS3X has a copy of this circuit that is used for cam or second trigger input. megasquirt ms3x v3. I have the m50 cam position sensor installed as form my understanding this is the one megasquirt can read, and I have an m44 crank sensor installed. 2. Would 18 gauge be alright to run from the MS. . Wiring the engine harness to the MS harness has been pretty clear except for some uncertainties with the CKP input and what our setup is capable of. It sounds like your saying I cant do that but just move the GREEN and RED wiring from my LED's to the ms3x expansion board itself. This is the latest top of the range MegaSquirt ECU – the MegaSquirt 3 (MS3)! This controller is jam-packed with features found on aftermarket engine controllers costing 10X as much, yet is easy to use and configure!. Colors of the wires on the distributor side of the 4 pin round connector, versus on the harness side. I'm less clear on whether its important to run the ground from MS to the engine (and thus back to the battery) or if I can simply take them to the battery via a nearby distribution block. 0 mainboard with MS3X as shown above running firmware MS3 1. MegaSquirt MS3X Wiring Bundle – 23″ 5 out of 5 $ 29. 4 Crank / Cam Inputs; 2. I'm setting up my wiring for my Dodge Van with 5. Should I split the signal ground wire out of the shield before the MS3X DB37, and route it to its own dedicated pin on the main DB37. Joined: Mon Sep 19, 2011 6:10 pm. Dated: Hardware manual covering specific wiring and 3. Also i a using the newest firmware on the ms3x, I believe it is 1. To make sure you can’t accidentally switch the upper and lower harnesses, the MS3X harness uses a male DB37 connector instead of a female one. In the idle settings I have set the frequency to 195hz. . RPM was around 300 U/min. 3: Wiring. Also using a jimstim 2. Part Number: BEC1800715. Oil idiot light switch – Right rear of engine on top of scavenger tube and check valve – (911-606-230-00-M85) Pin 7 – White. 1 uF capacitor from JS10 to SG or the proto area ground. 57 board, the ms3x wiring harness, 7mgte CPS and am getting decent cam/crank signal(not full sync yet, however I have full sync at crank and up to around 1000rpm, but that's another topic). See the MS3 manual wiring diagram for how to wire it up. Built a Megasquirt Computer to handle spark and ignition. At that. See t. 4. 0: Solder a 1K resistor to a length of wire and connect it from TachSelect to S5. Included is a MegaSquirt-III Engine Management System w/PCB3. The aim is to be most helpful to the customer with least confusion. . . I connected the "signal" grounds to the terminal where I ground all of the megasquirt grounds. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. Megasquirt 3 with 3X Expander and V3 CPU. 0 mainboard with MS3X as shown above running firmware MS3 1. 4g63 with stock 1990 sensor. Hi, Just putting my wiring harness together to power 4 LS2 coils sequentially on a Miata. The harnesses worked out great but what I noticed was that I started soldering and heat shrinking before I had all of the wires ran so I ended up having to unsolder and resolder a couple connections (Especially the Sensor_GND) a couple times and pull loom apart to add another. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. 99 DB15 Pigtail Harness Add for $ 23. To make sure you can't accidentally switch the upper and lower harnesses, the MS3X harness uses a male DB37 connector instead of a female one. 6 engine with ITBs, COPs, MS3X 2021 Macan S Day job. Well, apparently I’m not too brave lol. Use with MS3X Expansion board or other sequential device Just like a short run of the MS3X harness, but with no DB37 connector. Subscribe. Modding And Setting Up Megasquirt MS3X Remove Stock Wiring and ECU Modify Stock Wiring Mount The Megasquirt ECU Install CLT and IAT Sensors Wire The Megasquirt MS1/MS2 Harness Into The Car Wire The Megasquirt MS3/MS3-Pro Harness Into The Car Wire The ECU Panel, Wideband and Fuel Pump Reassemble The Engine Bay. harness side) when showing db37 pinout at all times. 18aw for the single wire supply is plenty big enough. 5″ long (including the mounting ears), 4-5/8″ wide, and 2. The BMW E36 is a masterpiece of attention to detail. x See the Setting Up manual for more detail on version numbers. . 8′ MegaSquirt Wiring Harness for MS3X. - Full custom harness builds - DIY wiring solutions - Circle track harnesses - Standalone installs. 5bar map built into the MS unit. 0 engine in my 1988 Mustang that had a 4 cylinder previously. MS3 Pro Plug and Play for 04-05 Mazda Miata Mazdaspeed Miata. Use a relay board and one of Mario's harnesses and you'll have a nice clean factory install. MS3X wiring and settings. I even pulled the Ms out and made sure the jumper was installed for the cam input. Obd1 and OBD2 cam sensors are 3 wire but the plugs are inverted male and female from obd1 to obd2. Harness Length and get Free Shipping on Orders Over $109 at Summit Racing! Shop the Labor Day Deals and Save Now! Vehicle/Engine Search Vehicle/Engine Search Make/Model SearchSimply choose your injector style from the drop down menu! This package includes an MS3Pro 1st Gen ECU. Would 18 gauge be alright to run from the MS. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. Megasquirt diagram wiring ms3x ms3 computer honda efi engine wire fuel source iq installation injection [diagram] megasquirt relay board diagram20 beautiful megasquirt wiring diagram Megasquirt relay board harness did own adRelay board mod: 2-wire pwm air valve + electric fan relay. That is the one part of the harness I did cut, and rewired the IAT wire to the GM sensor I installed in the y-pipe. 8′ MegaSquirt Wiring Harness for MS3X. You will also need to connect 330 ohm, 1/4 watt resistors from TPS VREF (pin 26) to both the low resolution signal and the high resolution signal to provide a pull-up in the wiring harness. 3. I wrote the 3 wire mode so the 3-wire valve can be driven as the manufacturer intended. 00. Hi All, I just recieved my MS3x and wiring harness yesterday, and have been looking for diagrams to use to wire it in to my car. 0 Hardware Guide. AI-enhanced title. Wiring the engine harness to the MS harness has been pretty clear except for some uncertainties with the CKP input and what our setup is capable of. MS3X adds a lot of complexity to the MS experience. 99. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . This terminal is also grounded to the engine block. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. Then check out our full line of MegaSquirt 2, MegaSquirt 3 and MicroSquirt assembled systems that allow you to skip the self-assembly steps that are required with our standard MS kits. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! External Ignition Wiring. . I double checked my wiring and everything is still hooked up correctly. Add to cart. . SAYS IF HALL SENSOR. -. Ms3x Wiring Png. 3. My firing order 1,3,7,2,6,5,4,8 SPKA - Coil #1. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy duty metal DB37 hood for superior RFI/EMI shielding (no cheap plastic ‘metalized’I've personally found PWM valves a little easier to configure - you just need to set the frequency (Ford runs theirs at 300 Hz) and adjust the duty cycle until you hit your desired RPM. 57 main board, MS3 daughter card, MS3X, and all the other associated parts. I have a m50 NON-Vanos motor with a Motronic 3. 500 Hwy 133. Post by Bahooki » Thu Feb 01, 2018 5:39 pm. Distance Rating. MegaSquirt MS3X Wiring Harness – 8 feet. Also i a using the newest firmware on the ms3x, I believe it is 1. I get to installing the MS3X. I connected the "signal" grounds to the terminal where I ground all of the megasquirt grounds. 3) MS3 Cam Input (Dual VR v2. Manual and Guide Full List. overall cost is a big factor to me. 1987 Supra - 2JZ-GE NA-T MS3 + MS3X Wiring Check. This harness connects to the lower (main board) connector, while the upper (MS3X) connector uses the MS3X harness. 0 Hardware Guide 2. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. SAYS IF HALL SENSOR. The versatile MicroSquirt with 8 foot harness- Version 3. MS3 3. Each wire comes with stamped labels every 3" along the length of the wire for easy identification. 8′ of TXL High temp automotive grade wire. I use a 2 wire PWM Ford style idle valve. The crank position input, is has the red wire from point 25 meeting the black from point 8 and then connecting to a blue and yellow wire at the pigtail. This is for a rear engine. We've packaged a DB37 male solder cup connector and a metalized plastic backshell for your MS3X builds. Learn how to set up and tune your MS3X/V3. General Tech Forums. Wiring the engine harness to the MS harness has been pretty clear except for some uncertainties with the CKP input and what our setup is capable of. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. $23. Jacob Hernandez. Alot of time the shield wire of the crank wiring is left untouched, but it needs to be grounded. MegaSquirt MS3X Wiring Harness for full sequential fuel injection and ignition, as well as tons of other I/O (Dual Stage Nitrous, 2nd O2 Sensor, Boost/Launch Control, etc) This is the harness build guide for the Megasquirt MS3X. Color coded wiring with labeling printed on the wire every 6 inches. Install TunerStudio and Megalogviewer software onto you computer. 1 Best Practices. We’ve packaged a DB37 male solder cup connector and a metalized plastic backshell for your MS3X builds. This is for 1. Pin 22 on MS3X is pre-named for a second O2 sensor. This manual contains a QuickStart Guide, installation, tuning and feature background information. Sort. Notably, the car features a BMW E46 M3 6-speed transmission, a Thayer Motorsport upgraded Limited Slip differential, and a meticulously assembled engine. 2003 Mustang 2V stock harness splice, MS3X v3. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. Add to cart. 25 IATwPiggy: Intake Air Temperature Sensor $9. I like using the relay boards because they simplify the wiring process and they make it a lot easier to have a clean install. With the jimstim hooked up it still says "not rpm synced". I have a m50 NON-Vanos motor with a Motronic 3. I need some advice from the group. 00. 99 Add to cart MegaSquirt 3 EMS System V3. 57 board with MS3X board. Wiring ultimate ms3 pro ms3pro pinout diagram evo harness standalone megasquirt ecu engine manual downloads center ls diyautotune gen management Wiring diagram miata control ms3 swap vvt tracking issues down help using circuit alt megasquirt connector ms3x build flipped stolen 3. Description. So i need to add in a few sensors for Oil Pressure, Fuel Pressure, 0-5v Dashpot, and wire to some specific ports for the trans brake staging and 3 step switches. 8 logic level ignition outputs. Naturally, I have raised these on the MS forum, but there is next. The R pin is the HEI module’s tach output. On the MS3X expansion board, R11 adjusts the threshold voltage, and R32 adjusts the hysteresis level. 0 parallel install, full sequential, HPX MAF, Ford Ev6 47lb injectors, COP, custom 8 BIP373 box, E85 pump, teflon lined return style fuel system, 39 lb base fuel pressure, Twin Turbo @ 7lbs boost, Dual 4 port boost solenoids, Dual 14point7 widebands Posted January 28, 2014. Add to cartToday's Posts; Member List; Calendar; Forum; E30 Technical Forums; General Technical; If this is your first visit, be sure to check out the FAQ by clicking the link above. SAYS IF HALL SENSOR. The MS3 case is like a 2 1/2" high version of a regular V3. the MS3X plug for sequential fuel and injection requires its own harness. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. 57 mainboard as shown above running firmware MS2/Extra 3. I currently have the recommended tach driver mods installed per MS2/Extra ignition description (which work). SAYS IF HALL SENSOR. 2a. 0 Hardware Guide 2. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. My questions: 1. 3) MS3 Cam Input (Dual VR v2. Preassemble and Prepare The Megasquirt MS3/MS3-Pro Harnesses. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. Connect it to pin 24 on the Megasquirt main board, or the Tach pin on the relay board. Pin 9 - Green / White. - MS3 V3. 2. The MS3Pro measures approximately 8. 1 Best Practices. 0 too, but the point gurov makes is fair - using identical drivers for both sides is good practice. Would 18 gauge be alright to run from the MS. Hi All, I just recieved my MS3x and wiring harness yesterday, and have been looking for diagrams to use to wire it in to my car. x Does not apply to other Megasquirt products. I used a short ignition cable to be able to use the timing light. MegaSquirt MS3X Wiring Pigtail – Length = 24″. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. 3 high current digital/pwm outputs. dependant on their location relative to their location in the harness. 5 out of 5 $ 114. Everything checks good in the engine harness. . 3) MS3 Cam Input (Dual VR v2. Description. In the end, the largest wires I used for the ECM side of things was 18awg for the injectors and coils, and that was. MS3X/V3. MegaSquirt MS3X Wiring Bundle – 23″ 5 out of 5 $ 29. That’s it! Using the MS-I PCBv3 or V3. Description MegaSquirt MS3X Wiring Bundle – Length = 8′ 8′ of TXL High temp automotive grade wire. 99 DIYAutoTune MegaSquirt MS3X Wiring Harnesses Wiring Harness, MegaSquirt MS3X , 8 ft. Some MS3X harnesses don't include shielded wire on their trigger input. I have recently purchased the ms3x 3. New MS3X wiring products available Post by Matt Cramer » Wed Oct 06, 2010 10:12 pm In addition to our new MS3X harness , we've used our new harness-building equipment to come up with three other MS3X related wiring items:Anyone onto the questions. Description. SAYS IF HALL SENSOR. We've got a pre-assembled MS3 with the MS3X extra board, and I believe it is a V3. The MS3x wiring diagram simply has an arrow pointing off to the "ground connection on main db37 plug" Thanks in advance, Arran. 99. 5 out of 5 $ 114. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! All wiring is pre-crimped (NOT solder cupped!) to the DB37 Heavy d. SAYS IF HALL SENSOR. Wiring the engine harness to the MS harness has been pretty clear except for some uncertainties with the CKP input and what our setup is capable of. 1. Matt Cramer -1966 Dodge Dart slant six running on MS3X. Note that the DIY Autotune wiring harness has a shielded wire – connect only the inner wire to this pin! Connect the E pin to pin 27. 05-19-2017, 03:45 PM. . 8′ MegaSquirt Wiring Harness for MS3X. Description. ( 6 customer reviews) $ 1,599. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. I'm currently working on the MS3 hardware manuals and as I've arrived at the table of wiring connections it has become obvious that the different existing manuals show different wire colours. 0 PCB, everything in the standard Bill Of Materials, the MS3 daughter board kit, the case, pre-machined endplates and heatsink bar. 57 and both complete wiring harnesses already wired for a coil on plug 3rz-fe motor. MS3Pro Ultimate Standalone w/ LSX drop in Harness. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. Wiring ms3 pro diagram ultimate ms3pro genMegasquirt ms3x wiring diagram Wideband aem ms3 canbus pnp 2001 straightforward helpfulMegasquirt3 wiring diagram. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . I was poking around tuner studio and noticed that I had the ability to set the firing order once I. The versatile MicroSquirt with 30″ Harness: Standalone Engine Management System, Transmission Controller or CAN I/O Expansion Module- Version 3. (Speed Density only. Sequential Fuel and spark plus a WHOLE LOT more! Professionally engineered and easy to install, fire up your L-series engine on day one! All wiring is composed of, self-extinguishing wrapped hi-temp TXL automotive grade wire with OEM connectors. MS3X setup and comm issues. Pull Spare Wires from Megasquirt Harnesses overall cost is a big factor to me. on the main ms3 harness there is only 1 crank input wire which I do have connected to the correct pin , everything is going to the correct pinouts according to the diagram. The engine harness is the later 82-83 ZXt style but the distributor end with the round four-prong one-way-fit plug was cut off and the. 9 Magnum. MS3Pro Ultimate Configurable Inputs/ Outputs: 10 channel 4:1 or 8:2 programmable peak and hold injector outputs. The ground. Matt Cramer -1966 Dodge Dart slant six running on MS3X. We offer most of our MegaSquirt systems as kits or assembled units to give you plenty of tuning options for your budget and needs. It will start with it un plugged and even cut the MS3x wire going into the harness for cam in and it still shows a tooth logger pattern when it starts up. MS3X/V3. 0, solder a 1K resistor to a length of wire and run it from the 5 volt point in the proto area to the TachSelect-VRIN jumper. Help with traction control wiring and needs. The stock wires might work by just looping the extra length of wire-if you can picture that. MegaSquirt-I Relay Cable (if you’re using the relay board and cable, you don’t need the standard MSHarness12, see note in product description) 8′ MegaSquirt Wiring Harness for MS3X. #32. 4 Scope of advice with MS3X; 2: Megasquirt System Hardware. At least that's what the wiring diagram that came with it says. Add to Cart. In this video the multiversal-timelines become intertwined, the editor screws up and shoulder pads! In all seriousness, I some wha. Распиновка разъемов C101 на X20 Bmw 3 Series 2 5 л 1987 года Drive2. C4 Tech/Performance - MS3X wiring to 91 HEI7 and ECM harness - Can someone confirm the C3, C9 and D13 ECU pin out function names and wiring colors pls? Bentley and Chevy Thunder are not consistent when describing these three. ;)New MS3X wiring products available Post by Matt Cramer » Wed Oct 06, 2010 10:12 pm In addition to our new MS3X harness , we've used our new harness-building equipment to come up with three other MS3X related wiring items:I have a couple questions I have some resistors to be able to run TFI as well as the ms3x card so I can easily run my PWM IAC and my A/C. Soo its been a min 😅. IMO it's strange why the stock MS3X wiring from DIY Autotune does NOT have shielded CAM-wiring as standard. Diyautotune harnesses. 2. On to all the injectors. 49 IATwPiggy: Intake Air Temperature Sensor $9. x card will need to be able to manage a 1992 f150 4wd 351w with MAP efi? also i see diyauto tune sells wires for the ms wiring harness that is 20 gauge. SAYS IF HALL SENSOR. Which outputs (A,B,C and D) go to. . Add to wishlist. I did a MS3x install last winter and used DIY's 10' wiring harnesses. I purchased an aftermarket harness for it and that wiring was smaller. Just like the MS3X harness, but with no DB37 connector. 1 ecu that is the vanos motor. Features in bold are added to the AMP’d MicroSquirt. Product Details. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. The MS3 and MS3X do not put out enough juice to fire the factory coils, unlike the Chevrolet Coils which have built in ignitors,. pin 21 CLT signal. 1. .