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.

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

02/07/2024

Professional installers offer the following information on, cleaning coolant mixed with oil, in the lubrication system. However, the following information, applies only to certain situations. So, it is not applicable for all engines, that have […]

Bubble Test – Used In Conjunction, With A Cylinder Leak Down Test

02/06/2024

So, to determine the health of a head gasket, between two cylinders, try doing a bubble test. If you believe you have a leak, but just cannot find it, doing a bubble test may be […]

Abnormal Exhaust Noise, Common On 02-05 Ford 6.0L Diesels

01/28/2024

Abnormal exhaust noise, on 02-05 Ford 6.0L Diesel Engines, is a growing concern, as these engines become older. Consequently, many of these engines would fail inspections. Because, of exhaust noise. So, the source of this […]

Valve Lash – Getting All The Facts For Setting And Adjustment

01/26/2024

The term “valve lash” is often used when talking about, valve train adjustment. A valve lifter follows the contour of the camshaft lobe, and transfers that motion to open and close the valves. (sometimes referred […]

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. […]

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