Engine control module ecm brain of the electronic fuel. Chrysler cars with fuel injection all have electronic ignition which became standard in the mid1970s across the line. Troubleshooting guide for engines with electronic fuel injection. Engine type electronic fuel injection efi engine rpm 3600 recommended oil 10w30 sae 30 oil capacity qt l 1. Todays impressively powerful vehicles are possible through direct fuel injection.
Some of these are in our stalling nonstarting repair page. To help our customers shop hasslefree, we have categorized our products. Some, however, use a vane type fuel pump mounted directly to the injection pumpfuel distributor assembly. Airfuel management as well as engine operational functions are performed by an embedded electronic control unit ecu. We show you how to diagnose and repair your harley davidson motorcycles delphi fuel injection system when you have stalling problems from loss of fuel pressure. It gives the clear idea about how to work a fuel injection system. Mixing fuel this way allows for it to puddle and condense in the plenum of the intake manifold, a. Harley davidson delphi fuel injection problems part 1. The main difference between carburetor and fuel injection system carburetorzfuel is atomized by processes relying on the air speed greater than fuel speed at the fuel nozzle, zthe amount of fuel drawn into the engine depends upon the air velocity in the venturi fuel injection systemzthe fuel speed at the point of delivery is greater than the air speed to atomize the fuel. Some of the vehicles are equipped with a multipoint type injection and others available in 198891 may be equipped with a dualpoint injection system.
Principle of efi efi is an indirect, pressurized injection system with injectors operated by. Electronic fuel injection system diesel engine keywords. Fuel injection electronic gasoline fuelinjection systems from the mid 1970s to the mid 1990s and later are all very similar in design and operation because they share a common beginning with robert bosch gmbh, a german company. Electronic fuel injection is a great means of delivering fuel to an engine. We carry many efi systemsmany selftuning and selflearningfrom the top players in engine performance, including msd ignition, edelbrock, holley, fast, accel, chevrolet performance, quick fuel, and more. View online or download mercury 150 efi service manual. Principle and working of electronic fuel injection system. Modern automobiles use electronic fuel injection efi in their fuel delivery system in order to increase the efficiency. Vw ve pump diagnostic troubleshooting hard start insufficient fuel supply, replace fuel filter one or more glow plugs bad or not getting power worn drive shaft support bushings in pump from over tightened timing belt water in fuel air leaks on suction side of fuel system injection pump needs. Part no 4790227 gb troubleshooting guide preliminary. User manual for efi fuel systems pg engineered control. Efielectronic fuel injection systems at summit racing. Also explore the seminar topics paper on electronic fuel injection with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year mechanical engineering me or production automobile students for the year 2019 2020.
This system consists of the unit injectors, fuel manifolds, electronic pressure regulator, high pressure fuel pump, electronic control unit, wiring harness, and engine sensors. The fuel tank breather can sometimes be blocked causing a vacuum in the tank which in turn draws the fuel back to the tank. Afc fuel injection training and troubleshooting manual. Take a technological leap forward with a new electronic fuel injection system from summit racing. Today, it has been superseded by gasoline injection systems which thanks to. I am not a professional but only a k100 enthusiast with good knowledge of the bike. Sequential electronic fuel injection engine management systems sequential electronic fuel injection engine management systems sequential fuel injection description system ecu only sequential fuel injection with hei and idle air control wide band oxygen sensing option included 302110. Afc fuel injection types 1 and 2 from november, 1974. Understanding how the system functions makes this system easier to diagnose and repair.
Highpressure fuel is supplied to the fuel injector by the fuel pump. Pdf sensors system,advanced fuel injection system,computer. Yet we can actually trace efis roots back way before thento the systems developed by robert bosch in the late 60s and early 70s for volkswagen and other european carmakers. Explore electronic fuel injection with free download of seminar report and ppt in pdf and doc format. The electronic control module ecm, or electronic control unit ecu, is a small. Bosch ljetronic fuel injection troubleshooting, maintenance. Installing a good ecu while a problem still exists elsewhere in the system.
The efi engines run more smoothly, with lower emissions and fuel consumption. Fuel quality contamination i have been involved with diesel fuel injection all my working life and still find the topic of fuel and solutions controversial. Many of them use a fuel pump essentially identical to the carbureted fuel systems. Injector nozzle breakage and leakage problems were solved. Engine acceleration or response poor cranking fuel pressure is low engine operating fuel pressure is low engine decelerates slowly. Fuel pressure is critical to the operation of a fuel injection system. These factors are based on the actual conditions and on the desired conditions at any given time during starting and operation. Its the most universal type of electronic fuel injection system, but its not ideal for high performance engines. The bosch djetronic electronic fuel injection system is composed of 3 major. The ecm determines the timing, the injection pressure, and the amount of fuel that is delivered to each cylinder. Troubleshooting the fuelinjection system in the ford ranger can be a daunting task.
A servojet electronic fuel injection system was designed and manufactured for the cummins vta903 engine. Fuel pressure should be a constant 10 15 psi on a tbi fuel injection system and is typically around 12 psi. Shop for affordable electronic fuel injection systems developed using oemlevel components, walkthrough fitech fuel injection. Certain mechanical fuel injection systems also utilize a mechanical fuel pump, typically some early gasoline fuel injection systems. Engine performance troubleshooting tree cm554 electronic control system with caps fuel system this troubleshooting procedure should be followed for the following symptoms. Troubleshooting cars with electronic ignition and fuel.
The efi is controlled by the ecu electronic control. Electronic fuel injection efi is interesting tech, critical to the performance of a modern engine. Air in fuel system bleed fuel system, eliminate air leaks shut offstart device defective repair or replace fuel filter blocked. Higher pressure than 15 psi indicates that there is. User manual for efi fuel systems pg engineered control solutions. Originally hated as computercontrolled carburetors, efi gained reliability in the 1980s and picked up performance in the 1990s. Between the years 1973 and 1995, the highly reliable, mechanical multipoint injection system kjetronic was installed as original equipment in seriesproduction vehicles. Troubleshooting guide for diesel fuel injection systems with bosch inline fuel injection pumps tank empty or tank vent blocked fill tankbleed system, check tank vent. Delphi pump diagnostic troubleshooting oregon fuel injection. Electronic fuel injection seminar report, ppt, pdf for. Introduction to fuel injection common service manual. Where a carburetor uses mechanical methods to provide the required fueling, the fuel injection system relies on a set of sensors and a computer to calculate and deliver the fuel needs. Always check to insure that you have the proper fuel pressure. Closedloop electronic fuel injection 20amp charging, regulated yellow oil cap and dipstick large filters air, oil, fuel hardened crank journals pto sideload sleeve bearing hydraulic valve lifters 12volt solenoid shift electric start dualelement air cleaner dual oil drains electronic ignition solenoid fuel shutdown oil sentry automatic.
And the engine ecu calculates at the optimum fuel injection volume, and causes the injectors to inject the fuel. Table of contents page contact list 3 engine management system overview 4 a ecm system components 7. Electronic fuel injection efi drove carburetors out of newcar production for good about a decade ago. Advanced diesel electronic fuel injection and turbocharging. Unit which interprets data from sensors that monitor the vital parts of the. Efielectronic ignition k100 2v troubleshooting disclaimer. Hondas programmed fuel injection pgmfi systems consist of three subsystems. The problem with such constantflow mechanical injection systems is that the. The efi system uses various sensors to detect the engine condition and vehicle running condition. Troubleshooting guide for diesel fuel injection systems. The lift pump produces a positive pressure, but of more importance, a solid column of fuel at the inlet of the injection pump. This video is the working principle animation of electronic fuel injection system. Pdf automobile engineering report on electronic fuel.
On diesel engines, fuel injection is a necessity, whilst on petrol engines fuel injection is. If equipped with a fuel supply pump check for minimum of 23 psi fuel supply pump pressure. Bosch is the largest supplier of fuelinjection systems in the world. Electronic fuel injection system diesel engine author. Gasoline engine efi electronic fuel injection fuel.
552 249 11 893 237 185 709 1244 1042 785 1341 486 272 1142 256 1338 391 688 945 1200 330 977 233 664 485 308 230 1475 663 166 408 630