Fuel System

Fuel Leak – If You Smell Fuel, This Could Be a Sign of a Fuel Leak

02/28/2026

Above all, you should never have a fuel smell in your vehicle. So, if you smell fuel, this could be a sign of a fuel leak. A gas leak can be dangerous, because it is […]

Fuel System Related Problems – Not Always Easy to Solve

01/22/2026

Fuel system related problems can be time consuming and difficult to solve. Consequently, anything that might affect the flow and pressure, is going to result in poorer performance. So, the biggest cause of any fuel […]

Mechanical Fuel Pumps – Everything You Need To Know

01/13/2026

The standard mechanical fuel pumps found on classic cars are very reliable. With that said, nothing automotive lasts forever. So at some point mechanical fuel pumps will fail. Most mechanical fuel pumps are used on […]

Fuel Pressure Regulator – Do You Have The Correct Fuel Pressure

01/05/2026

A fuel pressure regulator is an integral part of a vehicle’s fuel system. Now most engines use a fuel pressure regulator. However, there are things that can go wrong with them. Your fuel pressure regulator […]

Fuel Pump Issues – Excessive Heat – Contamination, Dirt, Rust

11/19/2025

The fuel pump should deliver fuel from the fuel tank to the engine; at the appropriate pressure. Fuel pumps on most modern vehicles are electric and are mounted in the fuel tank. However, older ones […]

Fuel Pressure Regulators – Commonly Fail In One Of Two Ways

10/07/2025

All fuel-injected engines, have fuel pressure regulators to maintain a regulated high-pressure level. Fuel pressure regulators, must keep the pressure constant, in order for all the components of the system to work properly. Consequently, if […]

Throttle Position Sensor (TPS) – Function – Failure – Testing

09/03/2025

So, the throttle position sensors function (TPS), is to supply vital information to the vehicles engine control unit (ECU). And, this information is based on, the actual position of the engines throttle valve. So, your […]

Fuel Pump Relay – Function – Failure – Testing Procedures

06/09/2025

The fuel pump relay, is activated whenever the ignition is turned on. So, the primary function of the fuel pump relay, is to maintain a steady voltage supply to the fuel pump. Therefore, when switched […]

Fuel Getting Into Engine Oil: Learn The Cause, Effect And The Fix

03/20/2025

First, fuel getting into engine oil is bad. Because, it lowers the lubricating qualities of the oil. And, it lowers the engine oil viscosity, causing the oil to thin out to a dangerous level. Above […]

Fuel Wash: What is it – Check If You Have It – Common Causes

03/03/2025

There is a condition, that adds to many engine failures, generally referred to as, “fuel wash”. Above all, there is only thing protecting your cylinder walls and bearings, from fuel wash. Consequently, that is, the […]

Fuel Injectors: Usually Only Fail, In One Of Three Different Ways

02/05/2025

So, today’s fuel injectors are a vital part, of a complex fuel management system. Fuel injectors, are basically a spray nozzle, that atomizes the fuel. Then, performs the final stage of delivery, to the engine. […]

Carbon Deposits On Back Of The Intake Valves

Carbon Deposits in Engines: Causes, Effects, and Prevention

12/14/2024

So, carbon deposits are formed, by the black soot that collects, and hardens in your engine. Consequently, every engine produces carbon. But, some engines are worse than others. So, the reason all engines have carbon, […]

Engine Fuel System: Signs of Trouble and What to Check

11/10/2024

So, the engine fuel systems job, sounds pretty basic. It delivers fuel from the fuel tank, to the engine. Testing the engine fuel system, is relatively simple. Engine fuel system consists of the filler hose, […]

Noid Light: Tests For An Electrical Signal, At The Fuel Injector

11/01/2024

Learning how to test fuel injectors, using a noid light, is easier than you think. Noid lights, provide a quick and easy method for detecting, if there’s an electrical signal, at the fuel injector. So, […]

Fuel Pump Failure: Signs, Symptoms, and Solutions

10/28/2024

Fuel pump failure, is one of those things, that no one wants to deal with. But, at some point, that is exactly what can and does happen. While it is possible to run on a […]

Fuel Injector With Buildup of Carbon Deposits On It

Fuel Injector – Deposits Can Build Up And Clog The Fuel Injector

07/19/2024

A dirty or clogged fuel injector, can cause classic engine problems. For instance, a lean misfire, rough idle, hesitation and loss of power. So, it doesn’t take much of a restriction in a fuel injector, […]

Gasoline Direct Injection Image Spraying Fuel into Cylinder

(GDI) Gasoline Direct Injection: How It Works and Its Benefits

07/01/2024

(GDI) is a fuel injection system that sprays gasoline, directly into the combustion chamber. So, (GDI) uses a separate fuel injector, for each cylinder. As a result, this allows for direct access, to the combustion […]

Electric Fuel Pumps – How Do They Work – How Can They Fail

06/23/2024

So, electric fuel pumps are fairly simple, but rely on many other systems, to function properly. Above all, electric fuel pumps are responsible, for delivering pressurized fuel, from the fuel tank to the engine. Consequently, […]

Idle Air Control Valve (IAC) Mounted on Engine

Idle Air Control Valve (IAC), Function, Failure Symptoms – Testing

03/31/2024

SO, THE IDLE AIR CONTROL VALVE, IS RESPONSIBLE FOR MANAGING THE ENGINES IDLE SPEED. And, that’s what makes the idle air control valve, a major management component of the engine. Because, it decreases or increases […]

Gas Getting Into Oil – What Can Cause This To Happen, And Why

02/22/2024

When changing your oil, one of the worst things to notice, is the smell of gas in the oil. Because, it means that gas, is somehow making its way into your engine’s oil. However, it […]

Mass Air Flow Sensor (MAF) - Function - Common Failure Signs

Mass Air Flow Sensor (MAF): Measuring Volume, Density, Temperature

02/20/2024

So, almost all newer vehicles on the road today, use a mass air flow sensor. The mass air flow sensor, measures the volume and density, of the air entering the engine. In addition, it also […]

Fuel Pump Related No Start Problems – What Should You Check

02/04/2024

The fuel pump runs continuously while your engine is running, delivering high-pressure fuel, to the fuel rail and injectors. The fuel pump keeps cool by staying submerged in fuel, or else it would overheat. So, […]