Sure enough, before I was even out of high school, Tuned Port Injection (TPI) was a reality-and it was like nothing we'd seen: wild runners, front-mounted air inlet, and individual fuel injectors. Welcome to Fuel Injection Specialties, your source for everything EFI. The Tuned Port Injection system and on-board computer controls will change the timing advance during engine operation according to engine load. Howell Engine Developments, Inc. was formed in 1988 by Bill and Matt Howell to support the growing trend towards the use of electronic fuel injection in the Hot Rod/Street Rod and Four Wheel Drive Industries. Each new harness contains in-depth application-specific instruction sheets, clearly marked factory GM connectors, labeled GXL jacketed wire, GM color coding, and pre-fitted corrugated slit loom for an extra value and professional look. Using the 1985-89 engine, the computer, prom, and knock sensor will ⦠Note that the DIY Autotune wiring harness has a shielded wire â connect only the inner wire to this pin! Ford frequently changed them, even within model years. While each of these ECM's/PCM's will provide excellent performancefor the Port and TPI systems, they are not interchangeable. We have over 25 years of experience, specializing in fuel injection system parts and services. Tuned Port Injection stand alone EFI wiring harness . Order online - easy ordering and fast shipping. What You Need This harness is designed to work with a 1990-1992 style TPI engine and accessory configuration. That is a 1227165 will not plug in to a 1226870 harness and operate. ⢠Online Access to Help,Schematics,and Wiring Diagrams ... Wiring Harness,Bosch Linear O2 Sensor (2 for the dual Model),Exhaust Bungs, Communication Cable, Data Link Adapter,and DataMap Software package. You can use a factory wiring diagram to follow the harness if you any work needs to be performed on the vehicle. This includes all wiring that is needed by the computer to run and control the fuel injection system. MAF designs require the correct harness and ECM #1227165. Harness comes completely loomed with automotive grade split loom. We offer Custom Manufactured Fuel Injection Wiring Harnesses and Wiring Harness Kits for the LS1, LS2, LSTruck, MAF TPI, Speed Density TPI, LT1 and TBI engines. We have also supplied the correct rubber grommet to install the computer inside the car. Using Ford factory wiring harnesses is an option for most engines and projects. TPI Speed Density Wiring Harness Installation. In 1985, GM introduced its Tuned Port Injection (TPI) manifold on the Corvette and the Camaro line. ... ⢠More Power than OEM-Style Tuned Port Injection Systems. Tuned Port Injection stand alone EFI wiring harness . Harness comes completely loomed with automotive grade split loom. These engines were factory equipped in Chevrolet Camaro and Corvette and were mated to either a 200-4R or 700-R4 transmission. Harness must be used with 01227730 ecm (speed density computer) and the correct prom chip with VATS removed. Click now! Ram Jet Crate series (350, 502) Standalone wiring harness with ECM / PROM -This harness replaces the factory GM crate Ram Jet engine harness and MEFI ECM. ÷ ï. This includes all wiring that is needed by the computer to run and control the fuel injection system. The Tuned Port Injection and Throttle Body Injection versions of the small block Chevy and used very different hardware, but similar electronics. Our harnesses are all made with top of the line copper strand wire. These systems will fit both new and old style heads, but the heads must be specified at the time of purchase. $725.00 LT-1 Standalone Harness - Mesh wrap and fan relays / wiring are included on the LT-1 harnesses. We use all GM grade connectors. However, accurate timing control relies ⦠Each harness comes complete with detailed installation instructions and full technical support by phone or online. Chevrolets Tuned Port Fuel Injection System, or TPI as it is more commonly referred to, first appeared on production vehicles in 1985 and, since then, has been used on all Corvettes and on many specially equipped Camaros and Firebirds. To help aid in a successful installation, I have included these instructions. These are the same components used by GM on factory harnesses. This harness is perfect for dropping any TPI engine into any vehicle. 1987 Pontiac Firebird Parts - Harnesses. Also available for this harness is a detailed step-by-step manual, and GM color coded wires with labels for easy installation. Down to the lower intake port, thus the name was born Tuned Port Injection / ⦠What wiring grounds do I ⦠Please see our shipping policy before ordering.Do You need remote coil wiring? The standard GM Tuned Port Injection systems we offer are 1990 / 92 Speed Density Systems. Our harnesses remove all the provisions for the unwanted items that modern FI engines come with. The wiring for these systems are not interchangeable, without modifyingthe wiring harness. It uses a tuner friendly production car 1991-92 Tuned Port ECM and PROM. Connect the E pin to MS3X pin 14 to send the timing signal to the HEI module. Please take the time to familiarize your self with all the components and If you require a high quality, OEM specification grade replacement wiring harness for your Tuned Port fuel injection engine, you came to the right place! In addition, all our harnesses are GM color-coded. GM Tuned Port Injection Harness installation instructions Thank you for your purchase from Larryâs Electric. Setting the ignition timing in the 1989 Corvette is similar to other GM V-8 engines. Tuned Port Injection stand alone EFI wiring harness . Most of the rest of the job is the same as 31. This harness takes care of the headaches involved with installing Tuned port injection on most all SBC engines or swapping a TPI engine into your vehicle, and makes for a much easier installation. Note: The 1986-1989 TPI uses a Mass Air Flow Sensor, and is easier to use on a hot rodded motor. Installation consists of simply laying out the harness on the motor, plugging in the various devices. We use all GM grade connectors. This wiring system is compatible with 1985 through 1992 GM 5.0 & 5.7 tuned port engines utilizing a mass air flow (MAF) sensor. GM Tuned Port Injection Camaro/Firebird/Corvette - 5.0, 5.7 - Engines (1985-1992): Our harness upgrades the 1985 through 1989 engines by running them on the 1990-92 Camaro or Firebird computer. It includes connectors for early style GM sensors (coolant temp, air temp, TPS, MAP and IAC) such as those found on a GM Tuned Port engine. The system operates using the 1986 through 1989 Camaro or Corvette engine control module (ECM) (computer) part number 16198259 or equivalent. The standard GM Tuned Port Injection systems we offer are 1990 / 92 Speed Density Systems. ... Engine Wiring Harness Wiring Diagram and Installation Instructions Electric Fuel Pump & Inline Filter Start up technical support. For example no VATS system, no Charcoal canister, no air pump, no EGR, ect... which allows for a much cleaner installation. The transmission choices are 4L60 (No E, Vette ) 700R4 (F-body) 6speed (Vette ) 5 Speed (F-body) The distributor of this year was a small EI ⦠We build each harness in house, using TXL grade automotive wire, and new GM connectors, terminals, and seals. At Howell EFI, we do not make a one size fits all product line. Add Proven, Self Tuning EZ-EFI® To Existing OE or Aftermarket Multi-Port EFI Engines; GM TPI, Ford 5.0L & More The wiring harness is completely pre-wired and labeled for a simple installation. The computer also requires a 1986-1989 Prom and Cal Pack which is inserted into GM Tuned Port Injection. This harness is designed to be a complete wiring system for the fuel injection system on General Motors tuned port (5.0L and 5.7L) injection engines. For installations of 1990 - 1992 Tuned Port Injection 5.0L and 5.7L V8 engines using the MAP system. PSI sells Standalone Wiring Harnesses for GM Gen II, III, IV, & V LS/LT based engines and transmissions. When using factory computers and wiring, pay close attention to the connectors. Ford Wiring and Connectors. FUEL INJECTION CONNECTION offers DELPHI and Molex factory connectors for most of the connections of the GM fuel injection ⦠If you are looking to install a Tuned Port Injection intake on your vehicle, then you should find the information below rather useful. This page is for information about GM Tuned Port Injection EFI swaps.TPI is a fuel injection system that uses individual injectors for each cylinder that are mounted in the intake manifold and usually ends up looking much different than a traditional carbureted setup. See it here. These engine wiring harnesses are designed to make your engine transplant effortless. À¯¶xêàia7G½ïããRâpØ6¬Ì'¹EåbÙ«ßÕ)±¸³+%Ï zbêâBÒ³Re,ºÎLâÆ¡I¨« \ì½Ä0+ÑPsaܾáøþñU5ò¾ö#ª¡Â(³ª~×U @WA´HÔÌÂ{Á`øÅ,.5_á!2xâðìÞ¢ÕO»¤?áRÁ# All PSI Harnesses are Made in the USA. These systems will fit both new and old style heads, but the heads must be specified at the time of purchase. The TPI system includes a manifold base, two ⦠This harness takes care of the headaches involved with installing Tuned port injection on most all SBC engines or swapping a TPI engine into your vehicle, and makes for a much easier installation. GM TPI Swap. Each harness comes complete with detailed installation instructions and full technical support by phone or online. This harness is designed to be a complete wiring system for the fuel injection system on General Motors tuned port (5.0L and 5.7L) injection engines. Please note whenever any specifics are given in terms of years, what matters is not the year of the intake you use, but rather the ECM/Harness. Tuned port injection / Induction received its name because of the runners, as the air enters the throttle body, through the upper plenum, it is driven down a series of 8 runners that are all equally tuned, by length and size. Each harness comes complete with the necessary relays and its own fused power source. Our harnesses are all made with top of the line copper strand wire. Our harnesses are ⦠Each harness has 3 feet of reach from the rear of the engine to the ecm, with an overall length of 5 feet. 1985-89 models can be run with Mass Air Flow Sensors (production design) or with the 1990-92, Speed Density electronics. Our harnesses are designed to operate Tuned Port Engines from model years, 1985 to the present. Most of the wiring in the harness has been pre-terminated to the proper connector and all The wiring harness only has four wires to hook up (ignition switch, fuel pump, starter, and ground). TPI 1990-1991 Speed Density Tuned Port Injection systems of this year are dubbed with the name Speed Density. Connections on the engine side.TPS (THROTTLE POSITION SENSOR)IAC (IDLE AIR CONTROL)IAT (INTAKE AIR TEMP)CTS ( TEMP SENSOR)MAP (MANIFOLD ABSOLUTE PRESSURE)KNOCK SENSORDISTRIBUTOR CONNECTION O2 SENSOR INJECTORS 1,2,3,4,5,6,7,8VSS AND 700R4 TRANSMISSION CONNECTIONS (IF USING THE 700R4)CONNECTIONS ON ECM SIDE BLACK 24 PIN, BLACK 32 PIN, YELLOW 32 PIN ECM CONNECTORSCHECK ENGINE LIGHT CONNECTIONS (LIGHT INCLUDED)FUEL PUMP RELAY AND FUEL PUMP CONNECTIONFUSE BLOCK WITH BATTERY AND IGNITION CONNECTIONSBRAKE PEDAL SWITCH CONNECTIONS (ONLY IF YOU USE THE 700R4 TRANSMISSION)ALDL OBD diagnostic connector Installation InstructionsPlease Allow 2-3 working days for processing online orders. To a 1226870 harness and ECM # 1227730 up ( ignition switch, Pump. Laying out the harness on the vehicle, the newer the engine to connectors... 01227730 ECM ( Speed Density computer ) and the correct harness and operate from the rear of the to... 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