Engine Diagnostics & Troubleshooting

Take the guesswork out of auto repair with our expert Engine Diagnostics and Troubleshooting guides. Whether you’re facing a stubborn “Check Engine” light, a mysterious “crank but no start” condition, or an intermittent rough idle, we provide the step-by-step procedures to find the root cause. Our resources cover how to use OBD-II scanners, interpret live data PIDs, and perform manual tests with multimeters and vacuum gauges. Learn to translate complex trouble codes into actionable repairs and master the logic of professional engine diagnostics to save time and money in the garage.

Oil Mixed With Coolant – In The Cooling System – Cleaning Tips

01/24/2024

Engine oil mixed with coolant, in the cooling system, is very common. Especially, after a blown or leaking head gasket. So, you opened your coolant tank or the radiator cap, and see that the coolant […]

Rocker Arms Dislodging – Along With Valve Seats Falling Out

01/23/2024

Rocker arms dislodging on certain engines, is a common problem and is usually misdiagnosed. So, a customer comes in and complains of a poor running engine. After diagnosing it, you find engine misfire codes. And, […]

Automatic Shutdown (ASD) Relay – Function – Failure – Testing

01/22/2024

The function of the automatic shutdown (ASD) relay, is to shut off power to major systems. When the key is turned off, as a safety feature. So, when the automatic shutdown (ASD) relay is on. […]

Diesel Engine Issues – The Answers May Be In The Exhaust Smoke

01/20/2024

Diesel engine issues, are frustrating, and can be costly to repair. Computer generated fault codes, only go a certain distance, to point you in the direction of the problem. Consequently, finding and solving diesel engine […]

Crankshaft Position Sensors – Function, Failure, Diagnosis, Testing

01/18/2024

Crankshaft position sensors, produce a signal, that talks to the engine control module (ECM) / engine control unit (ECU). Consequently, providing the exact position of the crankshaft, as it rotates in the engine. So, now […]

Cylinder Leak Down Test – What Are The Results Telling You

01/16/2024

Doing a cylinder leak down test, especially in conjunction with a compression test. Should allow you to quickly determine, the basic condition of any engine. So, a compression test is a “dynamic test” (engine moving). […]

Rear Engine Oil Leaks – Finding The Real Location Of The Leak

01/15/2024

Rear engine oil leaks, that are confused with a rear main seal leak, are usually an oil pan gasket leaking. Consequently, an oil pan gasket is also, much less expensive to replace, than a leaking […]

OBD1 – Trouble Code Information, For Honda 95 & Earlier Models

01/11/2024

So, it’s the weekend, you’re out enjoying the open road. And, WHAM, your OBD1 “Check Engine” light rears its ugly head. Now, you are wondering, what is wrong with the engine? So, all you need […]

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