Parts I'm using: Stock L28ET OneSix Dizzy LS2 CoilsHi 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. . Oil idiot light switch – Right rear of engine on top of scavenger tube and check valve – (911-606-230-00-M85) Pin 7 – White. 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. Any help would be appreciated. MegaSquirt 3 Engine Management System w/PCB3. MS3X is designed to run logic "smart" coils specifically like the LSx types which are usually 4 or more wires. 20 pages. Just like the MS3X harness, but with no DB37 connector. 5 out of 5 $ 114. I have just recevied a MS3 card and in anticipation of obtaining a MS3x, after reviewing the latest MS3x wiring schematic, pin 2 is now shown as a ground. MegaSquirt MS3X Wiring Bundle - Length = 8' 8' of TXL High temp automotive grade wire. Color coded wiring. 3. My tach was originally driven from the Neg side of a single 12V coil. 3 Wiring Harness The Megasquirt can be supplied with a "pigtail" wiring harness to form the basis of your own wiring. 2 high impedance injector outputs – max peak current increased to 19 amps. 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. 8′ of TXL High temp automotive grade wire. MegaSquirt Wiring Harness - 8 Feet Long We've completely redesigned our wire harness to help you get your fuel injection installation right the first time with several new features to help make your installation as easy and reliable as possible:. 3) MS3 Cam Input (Dual VR v2. 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. View Profile View Forum Posts. I have an m52 b28 in my car, running the obd2 harness spliced to my MS3x harnesses. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. 5 out of 5. MS3x Wiring Questions. for example 35x on second column means 35 pin on ms3x wiring diagram. Where is this harness made? We assemble this harness in Gainesville, Georgia, USA. Internal pull up: For a V3. Everything checks good in the engine harness. What grade of wiring is used? This harness uses 20 gauge TXL high temperature automotive wiring. I am now running wasted spark ignition on 6 cylinder BMW M30 engine. 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. MS3Pro Ultimate Standalone Engine Management System w/ Harness. Install TunerStudio and Megalogviewer software onto you computer. I've gotten the truck running great and was pleasantly surprised with the motors performance. Checking my COP wiring with my timing light, it seems that the coil output from MS3x needs to be wired in the following manner. 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. MegaSquirt MS3X Wiring Pigtail 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)- as for tach output, it seems that I use wire number 26 from the ms3x db37 to the tach. 24″ MegaSquirt Pigtail MS3X Harness $ 79. 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. I double checked my wiring and everything is still hooked up correctly. 1. Setting Up. Includes complete Universal 8′ Flying Lead Harness. 0 mainboard with MS3X as shown above running firmware MS3 1. Attached is a picture of VAG Logic Coil Pin-outs. 0 – Unassembled Kit Part # MS330-K. All wiring is automotive grade and the connector hood is metal. SAYS IF HALL SENSOR. 57 Hardware Guide 1: Introduction The MS3X/V3. . 1. I also have a Mustang 91 with T5 transmission and would like to use traction control feature. 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. One thing, you have 3 wire coils shown which are usually "dumb" coils and will need some sort of ignitor wired between them and the MS3X. 1 Wiring megasquirt tic b230 ms3x rele benzina pompaWiring ultimate ms3 pro ms3pro pinout diagram evo harness standalone megasquirt ecu engine manual downloads. You can use it with OEM harnesses or wiring from other sources, and use it with any ECU. 24″ MegaSquirt Pigtail MS3X Harness $ 79. Does the DIY MS3 wiring harness have wires populated for these pins? (Pins 5-6 on the MS3 output). This version of the documentation applies to: •. The MSD box says to wire the Violet(+) and Green(-) to the power and ground on the distributor. You may have to register before you can post: click the register link above to proceed. Pins 6, 28, 34 and 55 on the harness side go straight to Earth ground. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. Re: Wire gauge on the ms3. 6 Outputs; 2. Pin 15 is the ground circuit for the coil packs and pin 45 is shielding for that circuit. DB37 Solder Cup Connector for MS3X $ 8. Probing the sensor on a V3. Not including the connectors, the case itself is 1. 5″ tall including the mating connectors. Sensors should be grounded AT the Megasquirt, not at the engine. Anyone onto the questions. 4 Scope of advice with MS3X; 2: Megasquirt System Hardware. Run this resistor-on-a-wire from the 5 volt terminal in the proto area to the same input pin (SPR1 or PAD7) used in the previous step. SAYS IF HALL SENSOR. SE EFI. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. It is capable of controlling sequential injection on engines up to 8 cylinders, or semi-sequential up to 16 cylinders, combined with direct fire ignition for. Yeah, you need to test each coil in test mode to make sure they're even wired up correctly. I connected the "signal" grounds to the terminal where I ground all of the megasquirt grounds. Add to cart. To wire the fuel pump relay, connect pin 85 to the purple wire from the Megasquirt harness. For input I've tried datalog in, tableswitch, and the other ground switching input that I can't recall at the moment. Use with MS3X Expansion board or other sequential device Just like a short run of the MS3X harness, but with no DB37 connector. Wiring Harness, MegaSquirt, 8 ft. 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. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags. MS3X/V3. This version of the documentation applies to: • MS3 on a V3. 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. 4 Scope of advice with MS3X; 2: Megasquirt System Hardware. 1 ecu that is the vanos motor. The 3 wire IAC driver is the only circuit there and it is not tied to any of the pins on the 55 pin connector. All that looks good, so I’m going to get a new sensor tomorrow. billr wrote: If it will fire while cranking, then die as soon as the key is released back to the "run" position, it seems like your primary problem is how the ignition switch is wired to provide power; probably has nothing to do with the tune. ModMotorMayhem. I pulled the wire harness out and check all my wiring. 00. once the computer is hooked up to a 12v circuit it works just fine so thankfully I built it right. I'm setting up my wiring for my Dodge Van with 5. Description. On to all the injectors. 1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. nathaninwa Super MS/Extra'er Posts: 2628 Joined: Wed Sep 15, 2004. 8′ MegaSquirt Wiring Harness for MS3X. x (See the Setting Up manual for more detail on version numbers. 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. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! Use with MS3X Expansion board or other sequential device Just. Traction Control. MegaSquirt 3. Would 18 gauge be alright to run from the MS. Because of this, we need to replace the unshielded wire with two conductor shielded. GM uses a 20aw so I would think that would be. We are almost done pulling wires in the engine bay at this point. MegaSquirt MS3X Wiring Harness - 8 feet 8' of TXL High temp automotive grade wire. This harness connects to the lower (main board) connector, while the upper (MS3X) connector uses the MS3X harness. MegaSquirt MS3X Wiring Pigtail – Length = 24″. Boscobel, WI 53805. 99. The recall puts it towards the bell housing. Dated: Hardware manual covering specific wiring and 3. SAYS IF HALL SENSOR. See the MS3 manual wiring diagram for how to wire it up. I have my Bosch 3 wire valve connected as described above with one side to Idle (pin 9) and the other side to Boost (pin 6) from the MS3X. . . MegaSquirt MS3X Wiring Harness – 8 feet 8′ of TXL High temp automotive grade wire. 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. Under the hood I just made 'pigtails' from the other side of the multiplugs where i was adding new wiring, and ran wires to that, soldered, heat shrink. Setup your vehicle wiring harness ensuring it is fused. 00. The R pin is the HEI module’s tach output. However, MS3X now has Tach output. 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. 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. Add to wishlist. ,230/232 @. Serving my area. 57 with MS3X, use the Spark A output on the MS3X board (pin 14). i know i have 4 extra fuel/spark wires. 0, wire TachSelect to VRIN and TSEL to VROUTINV. 8 logic level ignition outputs. . Internal pull up: For a V3. 57 Hardware Manual Megasquirt-3 Product Range MS3 1. Hi, Just putting my wiring harness together to power 4 LS2 coils sequentially on a Miata. The versatile MicroSquirt with 8 foot harness- Version 3. MS3Pro EVO Standalone Engine Management System w/ Harness. Megasquirt 3 Wiring Help LM7 / LS1 / LS to a MS3 with MS3X (Megasquirt 3 with Expansion for sequential fuel injection). 6 wires off main harness terminate on engine sensors and switches. Also using a jimstim 2. 0. 8′ of TXL High temp automotive grade wire. SymTech Labs makes this harness using only the highest quality TXL grade, 20 gauge wire. MS3X MegaSquirt 3 with expansion arrives equipped with features surpassing MS2 and MS1 systems, like sequential fuel and spark, 2 step, progressive nitrous, boost control, onboard traction control and much more!. Full sequential COP and injection. ( 7 questions) 5 out of 5 based on 6 customer ratings. 3) MS3 Cam Input (Dual VR v2. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . Just swap wire from fidle to inj1 or 2, install jp7 jumper and put 1k. 1 Overview; 2. Each wire comes with stamped labels every 3" along the length of the wire for easy identification. The goal is to get the VE table to generate and AFR out the exhaust as close to the target AFR as possible. 6 Bench Test Wiring: MS3X/V3. the Foxbody 550-937F kit is $1230 and i think the difference is connectors, but my connectors are not all the same anyway. Run this resistor-on-a-wire from the 5 volt terminal in the proto area to the same input pin (SPR1 or PAD7) used in the previous step. SE EFI Installation Manual. 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. 99. 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. Colors of the wires on the distributor side of the 4 pin round connector, versus on the harness side. MS3/x ground wiring. Internal pull up on a V3. . 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. 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. Connect it to pin 24 on the Megasquirt main board, or the Tach pin on the relay board. Step 1) Decide which manual is correct for your engine (24x reluctor engine or 58x reluctor engine). I am running fully sequential fuel and spark via MS3X. A New Chapter Begins: Meet the New Owners of DIYAutoTune/AMPEFI October 10, 2023. Color coded wiring with labeling printed on the wire every 6 inches. The MS3Pro measures approximately 8. 0 mainboard. Add to cart I use an MS3x for a completely custom vehicle (engine is a 2. Matt Cramer -1966 Dodge Dart slant six running on MS3X. Wiring Harness, MegaSquirt, 8 ft. SAYS IF HALL SENSOR. by Dennis930 » Fri Jul 30, 2010 1:56 am. I've tried each wire from the sensor. I've also tried the nitrous in. MegaSquirt MS3X Wiring Pigtail – Length = 24″ 24″ of TXL High temp automotive grade wire. Dated: 2018-08-01. Color coded wiring with labeling printed on the wire every 6 inches — no paper tags here! Heavy duty metal DB37 hood for superior RFI/EMI shielding (no cheap plastic ‘metalized’ hoods used on our harnesses) This is the harness for the MS3X Expansion board. 1987 Supra Turbo - Megasquirt 3 w/MS3X & Holset 60/60 Turbo - Mega JOY! So, all coils share a common fused 12V, but each has a different ground connected to the MS3x box. We've got a pre-assembled MS3 with the MS3X extra board, and I believe it is a V3. I've had a build thread for the car going for quite sometime now which can be found here: Basically, at this point I've begun to build the wiring harness and wanted to not only ask a couple of questions, but confirm a few things I believe to be correct. 00. 8′ MegaSquirt Wiring Harness for MS3X. 00 MS3X-Hrn: 10' MS3X wiring harness $22. MegaSquirt MS3X Wiring Bundle – Length = 8′. comNeotech mega accordion harness Harness mega wiring ram 2006 cab dodge rear door mopar 2500 oem 2009Harness megasquirt 12ft. Note that the DIY Autotune wiring harness has a shielded wire – connect only the inner wire to this pin! Connect the E pin to MS3X pin 14 to send the timing signal to the HEI module. 3 high current digital/pwm outputs. My questions: 1. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. You don't need that ignition module, you ve COP on your car and you need to find a way to ignite your coils with MS3X spark outputs. 1L Hemi along with the engine wiring harness off of Craigslist. Megasquirt 3 with 3X Expander and V3 CPU. I have a m50 NON-Vanos motor with a Motronic 3. 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. 99 JimStim-C: Assembled JimStim diagnostic board $17. 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 DB37Heavy duty metal DB37 hood for superior RFI/EMI shielding (no cheap plastic ‘metalized’ hoods used on our. SAYS IF HALL SENSOR. We've got a pre-assembled MS3 with the MS3X extra board, and I believe it is a V3. 1 ecu that is the vanos motor. This product is manufactured in Gainesville, Georgia, USA. Otherwise when current flows through the grounds, there is a potential developed and the "ground" on the cam sensor will be below the ground on the Megasquirt. Wire spark output A (MS3X pin 14) to the stock ignition module trigger wire. 99. 12G main feed and 16G out to the fans. 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. Bring the e-fan wire (IAC1A) out to the front of the car around the driver side front relays (between the bumper and rad). The MS3x wiring diagram simply has an arrow pointing off to the "ground connection on main db37 plug" Thanks in advance, Arran. 5 mm barrel connector used with the Innovate LC-1 and VVTuner. MS3X/V3. 5 out of 5 $ 114. recently I purchased new MS & MS3X wire harnesses from DIYAUTOTUNE. 5 digital input/ output. 57 mainboard. This confuses me. (no paper tags). All wires are color coded and printed with their functions. 99. Terminal Type: Pin. 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. And also while cranking. I am also using the MS3X to drive my injectors and pin 36 on my mainboard harness only switches my CDI on and off for ignition so my mainboard harness doesn't really need to. 57 board with MS3X board. These manuals contain wiring, fuel and ignition setup and board assembly details that are specific to your exact ECU version. I'm setting up my wiring for my Dodge Van with 5. 3. We offer most of our MegaSquirt systems as kits or assembled units to give you plenty of tuning options for your budget and needs. 4g63 with weird spark output. For an MS3 V3. James1) MS3 Main board 15-19 grounds connected to engine block, MS3X wire harness not connected at this time. This product is manufactured in Gainesville, Georgia, USA. 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. 3) MS3 Cam Input (Dual VR v2. jsimmons Experienced MS/Extra'er Posts: 207 Joined: Thu Jun 11, 2015 6:12 am. Those are the pins you would use to ground your EMS and coil drivers. 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. Color coded wiring with. MegaSquirt Relay Cable. I feel that one of the common colour schemes should be used, e. The versatile MicroSquirt with 30″ Harness: Standalone Engine Management System, Transmission Controller or CAN I/O Expansion Module- Version 3. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. MS3X on 2010 Camaro LS3 + Whipple @ 10psi + HPT + AEM 30-0333/0334 WB. 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 widebandsPosted January 28, 2014. 2 Megasquirt Installation; 2. . 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). 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . 8′ MegaSquirt Wiring Harness for MS3X 5 out of 5 $ 114. $99. 99 Quantity Add to cart MegaSquirt MS3X Wiring Harness – 8 feet 8′ of TXL High temp automotive grade wire. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . 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. 21 the ecu powers on. 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. Included is a MegaSquirt-III Engine Management System w/PCB3. Older sensors used a specific keying you had to match with the connector you’re using. 4? Well it's a test motor for learning megasquirt before the engine swap to a 1UZ. Also i a using the newest firmware on the ms3x, I believe it is 1. Connect pin 87 to a 12V connection on the fuse panel and install a 20A fuse in the corresponding slot. MegaSquirt MS3X Wiring Bundle – Length = 23″. 0 ECU, which is based on Megasquirt-3 technology and features an MS3 card and an MS3X expansion card on a through hole V3. Re: MS3 wiring harness colours - standardisation. Would 18 gauge be alright to run from the MS. 3. Built a Megasquirt Computer to handle spark and ignition. 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. Found it relatively cheaply at 4K. 3. 8′ MegaSquirt Wiring Harness for MS3X. input wired with a 5v pullup. Distance Rating. D LS truck coils (round w/ heatsink style). The MS3x wiring diagram simply has an arrow pointing off to the "ground connection on main db37 plug" Thanks in advance, Arran. Back then I installed the TIP122 as described in the manual page 44-45. Then I checked from the bulkhead to the Ms, that was good. 2. 0 Hardware Guide 2. I purchased the pre-assembled MS3 with MS3X board and the 24" harness for both and pretty much have it all figured out except for these options. I wrote the 3 wire mode so the 3-wire valve can be driven as the manufacturer intended. Color coded wiring with labeling printed on the wire every 6 inches -- no paper tags here! Use with MS3X Expansion board or other sequential device Just. 57 mainboard. 3. 12v fused feed- from fuse box powered by the fuel pump relay. MS3Pro ULTIMATE Pinout Glossy Card. #32. And the newest version of tuner studio. Posts: 70. Since my MS3X is already installed and running my 1997 Vortec 350ci Truck, all I have to do is splice into the factory wiring for the signal hopefully this will. 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. During installation I added the wire from S12 to C end of D1 on the MS3X card per page 231/2. 57 w/MS3X with a 4 wire distributor? I have a 1987 Nissan 300zx and the dizzy is a 4 wire, power, ground, and 2 signal wire distributor. MS3/x ground wiring. Tweet. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . VISIT US. MegaSquirt MS3X Wiring Pigtail - Length = 24" 24" of TXL High temp automotive grade wire. 2. AI-enhanced title. The MS3X/V3. To start viewing messages, select the forum that you want. 57 with MS3X $99. General Tech Forums. 8' MegaSquirt Wiring Harness (MS1/MS2/MS3 Ready) Add for $ 99. 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. Ls1 ecm wiring diagramCommodore vy ls1 vz ecu pcm vx loom outs diagrams efi Ford wiring lincoln idmsvcs tidbits imageservice harnes2002 lincoln ls need wiring diagram for heater. 8 logic level ignition outputs. 57 mainboard as it uses the same driver as the MS3X. ( 7 questions) 5 out of 5 based on 6 customer ratings. Overview. (Speed Density only. HOWEVER when using the test page it seems that I am STILL not getting any spark signal from the. Post by shiftin04 » Thu Jul 08, 2021 3:06 pm. Description. 1988 Porsche 911 Carrera. Check Details Megasquirt ms3x wiring diagram. The R pin is the HEI module’s tach output. braineackMegaSquirt MS3X Wiring Harness – 8 feet. 00. x Dated: 2015-06-03 Hardware manual covering specific wiring and configuration of your Megaquirt MS3X/V357 ECU. ( 1 question) 5 out of 5 based on 4 customer ratings. 2) MS3 Sensor Ground PIN 7 Not connected at this time since no TPS, IAT, Coolant, O2's are connected. I currently have the recommended tach driver mods installed per MS2/Extra ignition description (which work). MS3 3. 1A) internally wired to MS3 Main Connector 27 IAC1B Blue/Red . $23. This terminal is also grounded to the engine block. Add to wishlist. You may also consider switching to a VW coils, they're logic level and you don't. the US Shift Pick-4 trans contoller is kinda expensive at $750 for harness and controller. 0) or a 93-95 325i (E36, Motronic 3. There are no reviews yet. Heavy duty metal DB37 hood for superior RFI/EMI shielding (no cheap plastic ‘metalized’ hoods. Preassemble and Prepare The Megasquirt MS3/MS3-Pro Harnesses. 3. Megasquirt Ls Wiring Harness megasquirt wiring harness diagram,megasquirt 3 wiring diagram,megasquirt 2 wiring instructions,megasquirt 2 wiring diagram,maxxecu ls wiring harness,megasquirt ms3x wiring diagram,ls plug and play wiring harness,ls motor wiring harness, You can also use it to hold it on the barbs on.