Author Question: Two technicians are diagnosing a poorly running engine with no stored DTCs. When the MAF sensor is ... (Read 150 times)

LCritchfi · **on:** Aug 13, 2021

Question 1

The typical MAF reading on a scan tool with the engine at idle speed and normal operating temperature is ________.
◦ 1 to 3 grams per second
◦ 3 to 7 grams per second
◦ 8 to 12 grams per second
◦ 14 to 24 grams per second

Question 2

Two technicians are diagnosing a poorly running engine with no stored DTCs. When the MAF sensor is unplugged, the engine runs better. Technician A says that this means the MAF is supplying incorrect air flow information to the PCM. Technician B says that this indicates the PCM is defective. Who is right?
◦ Technician A only
◦ Technician B only
◦ Both technicians A and B
◦ Neither technician A nor B