air fuel mixture imbalance

Vacuum Leak Detection: How to Find & Fix Vacuum Leaks Safely

04/20/2026

Vacuum leaks are one of the most common causes of rough idle, poor fuel economy, and engine performance issues. Knowing how to detect a vacuum leak safely can save you time, money, and frustration. Often, —READ-MORE

Engine Vacuum Gauge Test: A Simple Guide

03/11/2026

An old-school engine vacuum gauge test is a powerful ally. Because, it provides a direct window into your engine’s soul. This tool is often forgotten in the digital age. Yet, it can diagnose an engine —READ-MORE

Spark Plug Reading - How Do I Read, the Condition of My Spark Plugs

Spark Plug Reading: How To Do It: What It Can Tell You

03/03/2026

Spark plug reading is easy to do, and can be a valuable tuning aid. Because, you can determine a great deal about your engine’s, overall operating condition. Usually, just by examining the plugs insulator color. —READ-MORE

Engine Will Not Start, But Fuel, Spark And Compression Are Good

01/01/2026

All engines require three things to start and run, spark, fuel and compression. So, if any one of these is missing, your engine will not start. With a engine will not start issue, the possible —READ-MORE

Vacuum Leaks – How To Quickly Find Them In 5 Easy Steps

11/14/2025

Vacuum leaks in today’s computer controlled engines, can cause very serious engine damage. When an engine that has computer controlled spark and fuel systems, have vacuum leaks, the following events occur. Because, these leaks pull —READ-MORE

Air Injection System (AIS) – Air Pump – Function, Types, Failure

09/08/2025

The air injection system (AIS), is actually part of the car’s exhaust system. Since no internal combustion engine is 100% efficient, there will always be some unburned fuel in the exhaust. As a result, the —READ-MORE

Vacuum Test Basics – What To Check And How To Do It

08/15/2025

First, doing a vacuum test, can tell you more about your engine, than you think. And, it is one of the easiest and least expensive ways, to check an engine for serious issues. So, engine —READ-MORE

O2 Oxygen Sensor Symptoms (Causes, Testing & Replacement Guide)

03/10/2025

The, O2 Oxygen Sensor, measures the difference, between the amount of O2 in the exhaust gas. And, the amount of O2 in air. With the O2 oxygen sensor information and other sources, the (ECU) can decide, —READ-MORE

Testing to see why you have a Rough Idling Engine

Rough Idling Engine: What Does It Mean, How to Fix and Test It

02/24/2025

A rough idling engine is a common problem, of which the exact cause can be difficult to find. Also, the reasons for a rough idling engine can vary. With some being cheap easy fixes, and —READ-MORE

Comparing Spark Plug Color For A Quick Diagnosis

Spark Plug Color: Learn The Symptoms And Recommendations

11/23/2024

A visual inspection of the spark plug color will display symptoms, and conditions of what’s happening inside your engine. So, the experienced technician, can analyze the plugs, and track down the root cause of many —READ-MORE