A "cranks but does not start" problem on a waste spark type EI system is being diagnosed. When a spark tester is connected to each coil and the starter is engaged, there is no spark. Technician A says the crankshaft position sensor could be the problem. Technician B says the PCM could be the problem. Who is correct?
A)A only
B)B only
C)both A and B
D)neither A nor B

Question

Quizplus · Accepted Answer

Both Technician A and Technician B are correct. The crankshaft position sensor is crucial for the engine control unit (PCM) to determine the engine's timing for spark generation. If this sensor fails, the engine may crank but not start due to lack of spark. Similarly, if the PCM itself is faulty, it may not properly control the ignition system, leading to a no-spark condition.

A "Cranks but Does Not Start" Problem on a Waste