Customers don’t realize it needs attention. Sadly, many mechanics don’t, either.
Technician A has just completed a running compression test using a mechanical compression gauge. Technician B says that the test is used to check the volumetric efficiency of the engine. Technician A says that the higher-than-expected readings indicate a restriction on the exhaust side of the engine.
What is correct?
A) Technicia
B) Technician B
C) Both A and B
D) Neither A nor B
Quick disconnect tools are a must for modern fuel, A/C, or transmission line jobs; no more fighting clips.
By breaking down the structures used to create DTCs, you can learn how to “decode” beyond the simple descriptions presented by a scanner.
Many high-end scan tools come with a capable digital storage oscilloscope. Time to put that tool to work.
Technician A and Technician B are discussing ways to use fuel trim as a troubleshooting aid. Technician A says that fuel trims that are correcting for a lean condition at high RPM and load conditions indicates a problem in fuel delivery. Technician B says that this condition is caused by a vacuum leak.
Technician A is diagnosing a misfire. He states that a misfire is caused by a fault in the ignition system and that new plugs and coils will repair the problem. Technician B says that a misfire is detected when the ECM detects a variation in crankshaft speed.
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