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The guide details electronics and wiring conventions, ECU terminations, grounding, power requirements, and relay usage. It explains sensor coverage including TPS, MAP, air and water temperature, crank and cam sensors, vehicle speed input, and ignition fundamentals for coils. 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Extreme caution is required.",{"name":118,"@type":109,"acceptedAnswer":119},"What does the guide cover regarding engine inputs and sensors?",{"text":120,"@type":112},"It documents key inputs including TPS, MAP, air temperature sensor, water temperature sensor, crank sensor, cam sensor, and vehicle speed sensor (VSS), along with injector and ignition basics.","https://schema.org",{"og:url":83,"og:type":123,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":125,"canonical":83},"index,follow",{"doc_id":127,"site_id":62},676623,1793776279,{"code":4,"msg":5,"data":130},{"doc_id":127,"user_id":131,"nickname":92,"user_avatar":132,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":133,"file_id":134,"file_url":135,"file_type":136,"file_size":137,"view_count":4,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":138,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":128,"read_time":143},137451211410,"https://ap-avatar.wpscdn.com/avatar/2000bb0a9246f588df?x-image-process=image/resize,m_fixed,w_180,h_180&k=1786362646172706240","INSTALLATION AND TUNING GUIDE FOR:  \nEMS P/N 30-6905  \nEMS-4  \nPROGRAMMABLE ENGINE MANAGEMENT SYSTEM  \n􀀬!  \nWARNING:  \nThis installation is not for the tuning novice nor the PC illiterate! Use this system with EXTREME caution! The EMS-4 allows for total flexibility in engine tuning. Misuse of this product WILL destroy your engine!  \nInstallation of the EMS-4 must be performed by a qualified EFI technician familiar with EFI sensors, actuators and wiring.  \nYou should also visit the AEM EMS Tech Forum at [http://www.aempower.com](http://www.aempower.com)  \nNOTE: AEM holds no responsibility for any engine damage that results from the misuse of this product!  \nThis product is legal in California for racing vehicles only and should never be used on public highways.  \nAEM PERFORMANCE ELECTRONICS  \n2205 W. 126TH STREET, UNIT A HAWTHORNE CA 90250  \nPHONE: 310-484-2322 FAX: 310-484-0152  \n[http://www.aemelectronics.com](http://www.aemelectronics.com)  \nPage 1 of 279 EMS-4 Install and Tuning Guide_Rev 1.6  \nRevision History  \n\n| Version | Date | Modified Sections | Description |\n| --- | --- | --- | --- |\n| Initial Release , 1.0 | 12/27/10 |  |  |\n| 1.1 | 12/28/10 | Typical Idle Setup Tab\u003Cbr>Injectors section | Added example calculations for Idle Frequency Settings\u003Cbr>Clarified a section reference |\n| 1.2 | 12/28/10 | Injection Phasing\u003Cbr>Coil Phasing | Added details on Injector Advance table\u003Cbr>Added details on alternative firing order setups |\n| 1.3 | 12/30/10 | EMS-4 GPIOs | Added additional details to example setups |\n| 1.4 | 1/4/11 | Timing Pattern Basics | Corrected error in diagram |\n| 1.5 | 1/10/11 | Various | Fixed several minor typographical errors |\n| 1.6 | 2/10/11 | Internal Logging | Clarifications |\n| 1.7 | 3/23/11 | Advanced Tuning | Added Switched Ign\u003Cbr>Retard/Cut documentation |\n\nPage 2 of 279 EMS-4 Install and Tuning Guide_Rev 1.6  \nTable of Contents  \nGeneral Information ...................................................................................................................... 6  \nElectronics Warranty ..................................................................................................................... 6  \nPart 1 – EMS-4 Installation ........................................................................................................... 7  \nEMS-4 Basic Specifications ...................................................................................................... 7  \nWire Harness Options ............................................................................................................... 7  \nECU Terminations with Mini Harness, P/N 30-2905-0......................................................... 10  \nElectronic Wiring Conventions ............................................................................................. 16  \nGrounding ............................................................................................................................ 17  \nPower Requirements of the AEM EMS................................................................................ 17  \nUse of Relays to Control Ancillary Devices ......................................................................... 17  \nInstallation with Full Harness, P/N 30-3905-96 ....................................................................... 18  \nUSB Connector .................................................................................................................... 18  \nCAN Connector.................................................................................................................... 19  \nInjectors ............................................................................................................................... 19  \nCoils / Electronic Ignition System Basics .............................................................................21  \nTPS (Throttle Position Sensor) ............................................................................................26 ","cbCaiv8rv6FLtxrG","https://ap.wps.com/l/cbCaiv8rv6FLtxrG","pdf",9527156,279,"English","# General Information\n## Electronics Warranty\n# Part 1 – EMS-4 Installation\n## EMS-4 Basic Specifications\n## Wire Harness Options\n## ECU Terminations with Mini Harness, P/N 30-2905-0\n## Electronic Wiring Conventions\n## Grounding\n## Power Requirements of the AEM EMS\n## Use of Relays to Control Ancillary Devices\n## Installation with Full Harness, P/N 30-3905-96\n## USB Connector\n## CAN Connector\n## Injectors\n## Coils / Electronic Ignition System Basics\n## TPS (Throttle Position Sensor)\n## MAP Sensor\n## Air Temp Sensor\n## Water Temp Sensor\n## Crank Sensor\n## Cam Sensor\n## Vehicle Speed Sensor (VSS)\n# Part 2 – AEM Tuner\n## Software Installation\n## AEM Tuner\n## Basic Terminology\n## Menu Items\n## Editing EMS Calibration Files\n## Editing Options Displays\n## Editing 2D Table Displays","[{\"question\":\"Who should install the EMS-4?\",\"answer\":\"Installation of the EMS-4 must be performed by a qualified EFI technician familiar with EFI sensors, actuators, and wiring.\"},{\"question\":\"What safety warnings are included for using the EMS-4?\",\"answer\":\"The guide warns that the system is not for tuning novices or PC-illiterate users, and that misuse can destroy the engine. Extreme caution is required.\"},{\"question\":\"What does the guide cover regarding engine inputs and sensors?\",\"answer\":\"It documents key inputs including TPS, MAP, air temperature sensor, water temperature sensor, crank sensor, cam sensor, and vehicle speed sensor (VSS), along with injector and ignition basics.\"}]","EMS-4 Programmable Engine Management System - Installation and Tuning Guide | PDF",703]