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Automotive
ASE Certification
Fuel Systems & Air-Fuel Management
Knowledge Check
Fuel Systems & Air-Fuel Management
Knowledge Check
Knowledge Check
1 / 11
What does Long-Term Fuel Trim (LTFT) represent and how does it differ from STFT?
A
LTFT applies only at high RPM; STFT applies only at idle
B
LTFT measures total fuel consumed; STFT measures instantaneous consumption
C
LTFT and STFT are the same measurement taken at different time intervals
D
LTFT represents learned corrections stored in ECM memory; STFT is the immediate real-time correction
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