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Fault Feature Reasons Elimination Methods A. Engine Starting Difficulty. 1. Incorrect fuel delivery advance angle. 2. Air exists in the fuel system. 3. Fuel filter blockage. 4. Solenoid valve malfunction. 5. Worn or stuck plunger. 6. Injection nozz...

NO. ITEM NO. ITEM NO ITEM 1 Pump parts 41 Advance unit piston 81 protecting bush 2 Feed pump elements 42 Pendulum shaft 82 stop screw 3 ...

VE pump is a high-pressure fuel injection pump with single plunger, and its structure is characterized by a set of fuel elements, quantitatively regularly supplying diesel fuel to each cylinder separately. VE pump is a closed entirety, which consists of pump assembly, governor, feed pump, supply oil advanced devices ...

The information below is primarily aimed at diesel engines, since they commonly have the most smoke problems, it will also help with petrol engines and 2-stroke petrol/oil fueled engines.When it occurs, the Color of diesel engine exhaust smoke can tell you a lot about the internal condition of a diesel engine. &...

The fuel injector is part of your fuel distribution system. Fuel is drawn from the fuel tank by the lift pump, and then passes through the fuel filter before being sent either to the injection pump or directly to the injectors. The diesel fuel is then sprayed into the cylinder during the intake stroke of the engine. ...

The fuel pump is a key component of your vehicle. It pumps fuel from the gas tank to the carburetor or fuel injection system. If it isn't working properly, neither is your vehicle. Often, if dirt or rust particles enter the fuel line, those can clog the fuel pump's filter. Vehicles with 100,000+ miles tend to...

A fuel filter keeps out dirt or debris particles from a vehicle's fuel line and prevents their entry into a vehicle engine. A filter that goes bad or fails to function properly can cause an assortment of abnormal engine problems. Learn to recognize the most common symptoms of a bad fuel filter to keep your car ru...

Single plunger type distributor VE pump was developed in the mid 1970s by Germany Company Bosch, originally based on VE type fuel injection pump and VM type pump. In 1985, German introduced J series direct injection diesel engine from Japan, which are used for Isuzu N series light trucks, collocating with Single plun...

Injection nozzle is one of precise couples of diesel engine fuel supply system. The normal working life is more than 1000 hours. But sometimes it just can be used for almost hundreds of hours or even dozens of hours because of improper use. The reasons can be:   A. The diesel is not clean. There are impuritie...

Distributor pump works by sliding-vane supply pump system. The eccentric annulus, sliding vane, rotor and pump are installed in the inner end face. When the drive shaft rotates, the bond of feed pump drives the rotor rotation. The rotor turns four vane, sliding vane at the same time, making reciprocating movement in ...

Fuel injectors deliver the fuel mixture to the engine cylinders of cars. Problems with these devices can cause several noticeable decreases in car performance. Get familiar with the potential problems and their causes may help you diagnose faulty fuel injectors early and return your car to good working situation quic...

A VE pump plunger has both pressure fuel function and distribution function, and the rotating speed is 1000-2000 - r/mim, pumping fuel 4-6 times with every turn. The fit clearance is only 3 nm, thus it is easily jammed by slightly carelessness. The jammed locations are usually lying in two parts. One is the lag betwe...

1. Diesel fuel injection pump is not fueled.  (1) No diesel in fuel tank.       Add diesel timely.  (2) Air is mixed into the fuel system.        Loosen the fuel injection pump oil drain screw, use hand pump fuel and drain the air.  (3) Fuel filter or t...

Fault phenomenon case: An Iveco Coach is in the process of driving, but it can’t restart after sudden stalling any longer. Fault diagnosis: According to driver’s introduction, check whether the battery, starter, and the start line are normal. If the battery power is not enough, then place a battery in p...

Automobiles are becoming more and more popular in families. Therefore, vehicle engine, which is known as the heart of automobile, is no longer a plain mechanical noun. To clean engines and change oil correctly has been a topic that attached attentions of all owners of automobiles.   Under the influence of fu...

Many car owners worry about old car pieces during car repairing. Consumers should pay attention to the following four points when buying car accessories and carrying out car maintenance.   First, view the marks of products. Real products have clear marks of producer name, address, phone number etc and good-qu...

1. Maintenance Thinking Ways of Engine Burning Oil: We made analysis according to the owner’s presentation of engine burning oil and found that there were only two reasons for this phenomenon: First, aging valve oil seal and worn valve stem made valve guide wear. Second, worn cylinder liner and piston rin...

Excessive pressure of engine oil is a kind of fault that should be eliminated with judgment. Due to unexpected rise of engine oil pressure, it is liable to cause cracking of oil filter shell or oil sensor, and even burn up the bearing bush.   Common causes of high oil pressure are listed below: excessive vis...

VE distributor pumps belong to precision machinery, which contain many high precision parts and matching parts. They should be used and maintained correctly in order to guarantee the performance and longevity of engines and fuel injection pumps.   1. Protective oil on drive shaft should be eliminated before ...

First, Worn Fuel injection pump makes the diesel oil enter into engine oil.  Oil temperature increases significantly accompanied with smell of diesel oil. The oil will leak from oil mouth or vent when it’s serious. For piston supply pump and diesel oil entering into engine oil, there are only two reasons...

Eight Phenomena of Common Faults for High Pressure Common Rail: I. Gear pump doesn’t outlet oil when fuel system need rule out the air again for electronically controlled high pressure common rail diesel engine. Troubleshooting Methods: 1. Gear pump doesn’t work without fuel. Thus we have to add som...

Fuel injection pump has three kinds of type such as inline type, distributor type, monocoque type. No matter what kind of products it is, the most important part is the pump. The quantity, pressure and time of fuel pump must be very precise and automatically adjust according to the load. Fuel injection pump is a sort...

Symptom: The diesel engine (equipped with VE distributor pump) on a NHK notchback manufactured by Jiangxi Isuzu has good starting performance and it is quite normal when cooling. However, the engine losses its power gradually and even has flameout after running for a period of time.  Fault diagnosis: Burning...

Common rail technology is a method of oil supply that high pressure oil pump, pressure sensor and ECU consist of closed-loop system, separating the production of injection pressure from injection process completely. High pressure oil pump transmits high pressure fuel to public delivery pipe, controlling oil pressure ...

1. Chemical descaling: chemically dissolve the rust layer. The general technology of chemical descaling: Oil removing→Thermochemistry→Cold Wash→Descaling→Cold Wash→Neutralizing→Runny Wash→Passivation→Dry→Oil seal anti-rust.   2. Mechanical descaling: remove the...

Electrical components and wiring harness of electronically controlled diesel engine must keep dry and off water, oil and dust. The routine maintenance of common rail electronically diesel engine should be noted the following:   1. Please remember to turn off ignition switch before plugging connector plugins of...

1. Prevent Crushing Use triangular wood or brick to mat the wheel while repairing the vehicle. Secure the support if you use a jack to jack wheels. Observe whether there is someone or obstacles around when releasing the jack. Support inclined truck before checking the tube of hydraulic trunk.   2. Prevent Sca...

Fault Case One: Engine cannot start after changing the cylinder head gasket. Fault phenomenon: The phase of camshaft is not correct. Fault cause: The installation of camshaft is not correct. Fault analysis: Due to the uniqueness of CMP signal (CAM shaft angle sensor), the engine won’t start if the installati...

1. Fuel injection pump abrasion lead to diesel enter into oil Fault: engine oil level rises significantly with the smell of diesel oil. What is serious is that oil discharges from oil filer or ventholes. As for the piston fuel supply pump, diesel oil has only two ways to enter into the engine oil: diesel oil ca...

It’s difficult to judge intuitively the malfunction of high pressure pump during the working of diesel engine. In order to make beginner and personal with certain basic technique improve a lever to rule out the failure quickly, accurately and effectively, five exclusive methods are particularly introduced here ...

Core prompt: The power of a diesel engine depends on whether there is enough air inflow at each work cycle as well as whether the injection pump and injector are under good work conditions or not. This is an important problem we should consider when dealing with the power failure of diesel engine. A Cummins turboc...

As is known to us, with the development of the national requirement for the pollution discharge, EUROⅢ (National Ⅲ) engines are used more widely in the special heavy vehicle. Because electronic-controlled engine technology content is higher, maintenance personals are required higher in technical level, especially...

Injection needle valve is one of three couple precision elements of diesel engine fuel supply system. Its normal service life is more than 1000h. But due to improper use, it will often be worn and stuck after hundreds of hours or even dozens of hours. The main reasons of stuck injection needle valve are: ①The...

Audi was the first to say that, all of Audi’s new cars sold in China would carry auto-stop system and braking energy recovery system since 2012. Technical experts said, "In a sense, they are the micro hybrid, effectively reducing the energy consumption and carbon dioxide emissions." At present, all Au...

Fault Cases of Isuzu 4HK1 Diesel Engine Fault case 1: The engine cannot start after changing cylinder head gasket Fault phenomenon: Phase position of camshaft is not correct. Fault cause: The installation of camshaft is not correct. Fault analysis: For the uniqueness of CMP (Camshaft Angle Sensor), incorrect ...

Diesel engine’s power depends on whether its each work cycle of the volume is enough and the fuel injection pump and injector work is in good condition. That is what we should consider when we deal with poor diesel engine power.   Due to insufficient air inflow, turbocharged inter-cold diesel Cummins d...

Fault phenomenon: Diesel engine on an Iveco 40.10 car was assembled with VE distributor fuel injection pump. The plunger of head rotor was badly worn. So, the engine has difficulty for starting. Then change the head rotor and cam disc which has been worn seriously. However, diesel engine cannot start when the correct...

IMV is the abbreviation of fuel ratio control valve. IMV valve controls the proportion between fuel mount and oil return amount entering into high pressure chamber. This ratio is influenced by current magnitude through IMV. When current is zero, IMV is fully on. The aperture of IMV decreases with the increasing of cu...

Electronic guard against theft is a system that inlays a guard against converter inside key. When insert the key into key cylinder of ignition lock and turn to "on", electronic guard against theft ECU communicates with key through radio frequency identification. If the key is confirmed to legal, guard again...

Principle of turbo charged engine In fact, turbo is a kind of air compressor, which compresses air to increase air inflow of engine. In general, turbo charged engine utilizes inertia force of exhaust discharged by engine to drive turbo. The turbo drives coaxial vane wheel. Then the vane wheel compresses and feeds a...

Direct injection is not unfamiliar to Chinese consumers any more. With popularity of the technology, more and more consumers benefit from the technology. However, in China, direct injection is mainly used in turbo charged engines.    The full name of direct injection is engine fuel in cylinder direct in...

Reasons causing carbon deposition in engine When plungers of engine move downward, mixture of gasoline and air is inhaled into cylinders. Upward plunders compress oil has into combustible gas having high concentration. Then sparking plugs ignite and detonate combustible gas. Plugs are pushed by powerful explosive f...

High pressure common rail electronic injection refers to the closed-loop system which is made up of high pressure oil pimp, pressure sensor and ECU, separating production of injection pressure from injection completely. High pressure oil pump transmits high pressure fuel to common rail, realizing precision control th...

i-VTEC technology is not only special skill of Honda, but also originator of CVVT for other manufacturers. Currently, Honda has already popularized i-VETC technology in cars sold in China, including Earth Dream engine which is used by Fit, Accord, CRV and Spirior.   Working principle of i-VTECT technology&nb...

The fuel spray nozzle in vehicles is a simple magnet valve. When solenoid coil is energized, it produces suction and sucks up the needle valve, opening office. Fuel sprays out at a high speed through circular clearance between axial needle on the top of needle valve and office, beneficial to sufficient burning. Previ...

Electrical injector is the most important and complicated component on common rail system. It injects the furl in high pressure common rail into combustor of diesel engine at the best injection timing, injection quantity and injection rate through controlling magnet valve of-off based on the signal sent by ECU. ...

Valves are one of the most import parts on engine. The valves are used to import air into engine and discharge exhaust gas having been burned. In terms of engine structure, valves are classified into inlet valve and exhaust valve. Inlet valve is used to absorb air into engine, mixing with fuel and burning. Exhaust...

Engine is the most important part on automobiles. The layout of engine has great influences on performance of automobiles. In terms of sedans, the layout of engine is classified into front engine, middle engine and rear engine. Most automobiles use front engine. Middle engine and rear engine are only used by sports c...

Longitudinal engine means that the engine is vertical to front axle of vehicle. In brief, the engine is located longitudinally inside engine compartment.    Advantages of longitudinal engine In general, longitudinal engine is mainly applied on rear wheel drive. The power should be transmitted to rear ...

FSI (Fuel Stratified Injection) is a kind of technologies based on GDI (Direct Injection). What is different from airway jet injection engine, FSI injects fuel directly into combustor. Due to gasification and cooling of atomization, FSI optimizes volumetric efficiency, realizing constant flow control on engine withou...

Electric fuel pump on electronic injection automobiles is different from devices on non-electronic injection automobiles. Electric fuel pump is used to raise the pressure of gasoline and inject the gasoline into delivery pipe. Electric fuel pump consists of electromagnetic driving structure and oil supply structure.&...

Diesel common rail system has been developed into the third generation, having strong technical potential. High pressure pump on the first generation common rail system is always maintaining high pressure, resulting in energy waste and high temperature. The second generation common rail system can change delivery pre...

CRDI is short for common rail direct injection, meaning foe high pressure common rail diesel direct injection. CRDI, SDI and TD are diesel engine technologies developed by BOSCH. Common rail system consists of high pressure pump, spray bar, high pressure accumulator, injector, ECU, sensor and actuator.   ...

As a key component of electrical ejection engine, injector has direct influences on the performance of engine. Injector blocking affects vehicle. The reason causing blocking is that carbon deposition inside engine deposits on injector or impurities in fuel blocks the access of injector. When vehicles have been driven...

Engine cleaning includes inward and outward. Engine outward exposes inside engine compartment. It is cleaned few. So, engine cleansing agent, also called as cleanout fluid refers to a kind of conservations which are used to clean oil sludge, carbon deposition and colloid inside engine, maintaining clean, intensifying...

Hybrid power automobile means that the automobile has more than two power sources: accumulator, fuel cell, solar cell and internal combustion engine. At present, hybrid power automobile refers to automobile equipped with internal combustion engine and accumulator.   Advantages of hybrid power automobile: 1...

The D-4ST on Crown manufactured by FAW-Toyota attracts tremendous attention for the new technologies leading other competitors. However, dual injection system causes disputes. Direct injection system is welcomed nowadays. Engine equipped with direct injection system is sufficient. However, D-4ST on new Crown is not o...

Common rail system is different from the diesel injection system driven by camshaft. Common rail system separates injection pressure and injection process completely. Injector controlled by solenoid valve takes place of traditional mechanical injector. The fuel pressure in fuel rail is produced by radial piston high ...

How Does Regulating Valve Work A regulating valve controls the pump chamber’s pressure. Regulating Valve consists of valve’s body, regulating piston, regulating spring, rose ring and block. Regulating valve is pressed by the fuel pressure and regulating spring force’s joint action. The rotating sp...