Injection Pump Hours: Everything You Need to Know
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Injection Pump Hours: Everything You Need to Know

An injection pump is connected to the injectors, it passes fuel to them. Thus, its role is very important for adjusting the correct dosage of fuel injected into the engine combustion chambers. Thanks to the high-pressure fuel pump, the combustion of the air-fuel mixture will be optimal. In this article, we will focus on the timing of the injection pump: its definition, the signs of poor timing, how to synchronize, and how much it costs in the workshop!

🚗 What is the timing of the injection pump?

Injection Pump Hours: Everything You Need to Know

Injection pump timing indicates the placement of the injection pump in relation to injectors и engine your car. The purpose of the injection pump timing is limit pressure fluctuations systems in order to avoid pumping a sub-optimal dose of fuel into combustion chambers.

Typically, this time will be in accordance with the pulley of the injection pump; however, each injection pump has different timing characteristics according to different criteria such as:

  • Quantity pistons present on the injection pump;
  • The number of cylinders in the engine can vary from 4 to 8;
  • Rail volume;
  • The diameter of the injection pump pipes, which determines the fuel injection pressure;
  • Engine type, ie gasoline or diesel.

If the timing of the injection pump is wrong, the fuel may be sent to the wrong cylinder and it will be sent directly to the muffler and then pumped out without even burning out.

⚠️ What are the symptoms of incorrect timing of the injection pump?

Injection Pump Hours: Everything You Need to Know

If you have just repaired or replaced your injection pump, it may happen that the latter has a bad timing. This stalling problem can also occur with overuse when the injection pump starts to wear out.

Thus, the symptoms of incorrect synchronization of the injection pump are as follows:

  1. Boost pits appear : the combustion problem remains in one or more cylinders, which leads to the formation of holes during the acceleration phases;
  2. Le engine warning light to light up : Indicates a problem with the engine, may also indicate a malfunction of the vehicle's anti-pollution system;
  3. Difficulty starting a cold car : cold start will be more and more difficult, you will need to turn the key in the ignition lock several times before the car starts;
  4. Loss of engine power : when you press the accelerator pedal, the engine will have difficulty increasing the RPM.
  5. The smell of fuel in the cabin : Since some of the fuel does not burn, the smell of the fuel can be felt in the interior of the car, and it will be even stronger if you activate the air conditioning system.

👨‍🔧 How to make a timing pump for injection pump?

Injection Pump Hours: Everything You Need to Know

The timing of the injection pump of your car is carried out by the manufacturer during the initial installation of the latter. This setting will then be done again each time a part is repaired or replaced. The pump is positioned to the nearest millimeter with respect to Руль so that the first pump piston located at the injection point coincides with the position of the first piston of the engine.

This maneuver is quite difficult and requires good tools. Indeed, you will need pump timing comparator, injection pump timing kit and valve timing drive rod.

Depending on the pump model (single-point, multi-point, common rail, in-line or rotary injection) and pump brand, the tuning maneuvers will not be the same. That is why it is recommended to consult with service book your car or instruction for your injection pump to find out the specific calibration method.

💸 How much does the injection pump synchronization cost?

Injection Pump Hours: Everything You Need to Know

If you need to calibrate your vehicle's injection pump in a car workshop, it will take from 70 € and 100 €... The differences in this price are explained by the price of the injection pump gas distribution kit and the hourly wages in the selected garage.

Timing of the injection pump is one of the parameters to ensure good combustion of the air / fuel mixture in your engine. As soon as you discover any malfunctions with this part, contact a professional in the garage immediately before it causes degradation of the performance of other parts related to the engine!

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