Do it yourself
Frequently asked questions about cars and motorcycles
Car tutorial (Do it yourself) Motorcycle tutorial (Do it yourself) Frequently Asked Questions

Adjusting Combustion via Injection Pump

Model: (Various brands) Various
Part: Fuel pump

Video tutorial

Pressure regulators suitable for our purpose are readily available on the market, often sold together with a pressure gauge. Using this tool, to optimise the atomisation in the engine, you can increase the pressure by 0.3 - 0.6 bar (not more, otherwise you will overload the circuit and the injectors).

Mount the regulator on a test rail/collector and measure the initial working pressure with the pressure gauge. Then, secure the regulator in a vice as shown in the video and tighten it slightly: perform this operation gently, tightening a little at a time, then remount the regulator on the rail to see how much the working pressure has increased.


Updated on 3 May 2026 by ScegliAuto


Related tutorials

How does the fuel dispensing module work in a 3D animation?
How does the fuel dispensing module work in a 3D animation?
(Various brands) Various In this beautiful 3D animation, we can see how the fuel delivery modules work, transporting fuel from the tank to the combustion process. The animati…
How to Disassemble a Diesel Injection Pump
How to Disassemble a Diesel Injection Pump
(Various brands) Various This is a specialised procedure: it is a guide to disassemble a diesel injection pump (Bosch V.E. type) for refurbishment. However, this is not a gar…
How the Fuel Pump Module Works
How the Fuel Pump Module Works
(Various brands) Various In this stunning 3D animation, see how fuel pump modules transport fuel from the tank to combustion. It also shows how they are constructed, the adva…

How to Open the Bonnet of a Toyota C-HR

To open the bonnet of a Toyota C-HR, get inside the vehicle and lift the lever with the bonnet symbol located under the steering wheel. After lifting the lever, you will notice that the bonnet rises a few centimetres. Position yourself in front of the bonnet, insert your hand into the gap, and move the small internal lever from right to left, then lift the bonnet. You can keep the bonnet open during maintenance by positioning it on the support rod. To close the bonnet, remove the support rod and let it drop back down.

Watch the video!


by ScegliAuto

More videos