Randy Wallace

Randy Wallace

Randy Wallace is an automotive writer with years of hands-on experience working with everyday vehicles, tools, and real maintenance situations. He focuses on how car systems behave over time, what tends to fail first, and which issues are often overlooked until they become inconvenient, costly, or unsafe.

Radiator Issues

The radiator is a critical component of a vehicle’s cooling system, tasked with dissipating heat generated by the engine. While many drivers may not give it much thought until a problem arises, those who have spent time in automotive repair…

Check Engine Light in BMW Vehicles

The check engine light (CEL) is a common feature in modern vehicles, including BMWs, and it serves as an indicator of various potential issues within the engine management system. The light can illuminate for numerous reasons, from minor issues to…

Carburetor Issues

Carburetors have been a fundamental component in internal combustion engines for decades, particularly in older passenger cars and some commercial vehicles. While fuel injection systems have largely replaced them in modern vehicles, carburetors remain prevalent in classic cars, motorcycles, and…

Diagnosing P0320

The P0320 diagnostic trouble code (DTC) relates to the ignition distributor engine speed input circuit. It indicates a malfunction in the engine speed input system, which is crucial for the proper functioning of the ignition and fuel injection systems. This…

Coolant Temperature Sensor Issues

In the world of automotive diagnostics, the coolant temperature sensor (CTS) often plays a crucial yet understated role. This small component, typically located near the engine block or in the cooling system, provides vital information to the engine control unit…

Flashing Check Engine Light

A flashing check engine light is one of the more alarming sights for a driver. It often signals that something is amiss in the vehicle’s engine management system. From my years of working on various passenger cars and commercial vehicles,…

Diagnosing P0175

The P0175 diagnostic trouble code (DTC) indicates an engine running too rich on bank two, a condition where the fuel-to-air mixture is overly rich. This problem can manifest in various vehicles, from passenger cars to commercial trucks, and understanding its…