Ces Test Questions And Answers For Engine Management | Premium Quality

B) VVT solenoid stuck open

A) Clogged fuel filter B) Vacuum leak C) Weak fuel pump D) Restricted exhaust ces test questions and answers for engine management

Swapping ignition components is a classic isolation test. Since the misfire followed the coil, the coil is defective. Load-induced misfire often points to ignition breakdown under higher cylinder pressure. Plugs typically fail under idle or light load too; injectors wouldn’t move with coil swap; compression issues wouldn’t transfer. Question 3 – Oxygen Sensor Rationality Question: A car fails an emissions test for high NOx. At steady highway cruise, the upstream O2 sensor signal is switching slowly between 0.1V and 0.9V every 5 seconds. Downstream O2 sensor is steady at 0.7V. What is the most likely cause? B) VVT solenoid stuck open A) Clogged fuel

A) Replace spark plug cylinder 2 B) Replace fuel injector cylinder 2 C) Replace ignition coil cylinder 2 D) Perform compression test cylinder 2 Plugs typically fail under idle or light load