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Pontiac
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2001
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Sunfire L4-144 2.4L DOHC VIN T SFI
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Repair and Diagnosis
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Powertrain Management
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Computers and Control Systems
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Testing and Inspection
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Initial Inspection and Diagnostic Overview
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- Standard Model (Non-Alternative Fuels)
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Scan Tool Diagnostics
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Scan Tool Data Definitions
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Fuel Trim Cell
Fuel Trim Cell
RANGE 0-22
A fuel trim cell depends upon the engine speed and the MAP sensor readings. RPM vs.
MAP
is broken down into 22 fuel trim cells. The fuel trim cell indicates which cell is currently active.