{"product_id":"ft450-550-4-cylinder-universal-a-harness","title":"FT450\/550 4 Cylinder Universal A Harness","description":"\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#tab1\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#tab3\"\u003eDownloads\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\" id=\"tab1\"\u003eThe FuelTech Universal 4 cylinder A harness is a great addition to any 4 cylinder build and can be used with both the FT450 and FT550 ECU’s in a complete plug and play style. It is to suit 4 injectors and 4 individual smart coils, wired in semi-sequential fuel injection and wasted spark ignition (full sequential requires the \u003ca href=\"https:\/\/www.fueltech.net\/collections\/ecus\/products\/ft550-efi-system\" title=\"FuelTech's FT550 ECU product page\"\u003eFT550 ECU\u003c\/a\u003e and the \u003ca href=\"https:\/\/www.fueltech.net\/collections\/complete-harnesses\/products\/ft550-4-cylinder-universal-b-harness\" title=\"FuelTech's FT550 4 Cylinder Universal B Expansion Harness product page.\"\u003e4 Cylinder Universal B Expansion Harness\u003c\/a\u003e). It can be used with high or low impedance injectors; low impedance requiring the use of a \u003ca href=\"https:\/\/www.fueltech.net\/collections\/peak-hold-drivers\" title=\"Fueltech Peak \u0026amp; Hold Drivers\"\u003epeak and hold driver\u003c\/a\u003e, high impedance requiring a \u003ca href=\"https:\/\/www.fueltech.net\/collections\/adapters-misc\/products\/peak-and-hold-jumper-harness?_pos=1\u0026amp;_sid=f4002e60a\u0026amp;_ss=r\" target=\"_blank\" title=\"FuelTech Peak \u0026amp; Hold Jumper Harness\" rel=\"noopener\"\u003epeak and hold jumper harness\u003c\/a\u003e (both sold separately). The harness is set up for either VR or Hall effect cam and crank sensors and includes 3 relays with built in fuses for main electronics, injectors and coils. The universal 4 cylinder A harness has a label for each connector and the insulation is heat, moisture and oil resistant.\u003c\/li\u003e\n\u003cli id=\"tab3\"\u003e\u003ca href=\"https:\/\/files.fueltech.net\/manual\/Ingles\/4_cylinder_Harness.pdf\" rel=\"noopener noreferrer\" title=\"FT450\/FT550 4 cylinder universal harness Manual\" target=\"_blank\"\u003e\u003cspan\u003e\u003cimg src=\"\/\/cdn.shopify.com\/s\/files\/1\/1414\/6340\/files\/Download_Icons-01_46a273cc-34d8-445f-a359-74bf61fa7a1c_large.jpg?v=1517420591\" alt=\"\"\u003e \u003c\/span\u003e FT450\/FT550 4 cylinder universal harness Manual\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- split --\u003e\n\u003ch3 style=\"text-align: center;\"\u003eTechnical Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e4 EV1 injectors\u003c\/li\u003e\n\u003cli\u003e4 Smart coils\u003c\/li\u003e\n\u003cli\u003eFuelTech Peak and Hold external drivers ready\u003c\/li\u003e\n\u003cli\u003eFuelTech WB-Nano O2 ready\u003c\/li\u003e\n\u003cli\u003eGM style intake air temperature sensor ready\u003c\/li\u003e\n\u003cli\u003eGM style engine temperature sensor ready\u003c\/li\u003e\n\u003cli\u003e2 pressure sensors ready for fuel, oil \/ another 0-5V sensor\u003c\/li\u003e\n\u003cli\u003eExtra output connector for generic use\u003c\/li\u003e\n\u003cli\u003eCrank and CAM connectors (hall and VR options included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis harness was designed for systems with up to 4 injectors, 4 smart coils and a FuelTech Wideband Nano O2 with Bosch LSU 4.2 sensor. It's setup to run semi-sequential or multipoint injection and wasted spark. It is already wired for use with a FuelTech Peak and Hold driver when using 4 low impedance injectors. When using high impedance injectors, a Peak and Hold driver is not needed and in this case, only a bypass connector is required \u003cspan\u003e(jumper \u003c\/span\u003e\u003cspan\u003eincluded\u003c\/span\u003e\u003cspan\u003e)\u003c\/span\u003e. There are 3 separate relays to power the whole system, separating the injectors and coils from the electronics. \u003cstrong\u003eTo activate coils and injectors relays the Blue#6 output must be configured as Fuel pump or RPM activation.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cem\u003e*This is only the A harness which is all the FT450 requires.\u003cbr\u003eTo use this harness with the FT550, the \u003ca href=\"https:\/\/www.fueltech.net\/collections\/complete-harnesses\/products\/ft550-4-cylinder-universal-b-harness\" target=\"_blank\" title=\"FuelTech's FT550 4 Cylinder Universal B Expansion Harness product page. \" rel=\"noopener\"\u003eFT550 4 Cylinder Universal B Expansion Harnes\u003c\/a\u003es is required in order to use all of the extra inputs \u0026amp; outputs.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e","brand":"FuelTech","offers":[{"title":"Default Title","offer_id":45909042004021,"sku":"2002006505","price":599.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1292\/3679\/files\/FT450_5504CylinderUniversalA.png?v=1787065630","url":"https:\/\/www.fuelinjectorconnection.com\/products\/ft450-550-4-cylinder-universal-a-harness","provider":"Fuel Injector Connection","version":"1.0","type":"link"}