LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Buick >> 2005 >> LeSabre Limited, 4T65E/M15 >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Engine Control System 3.8L (Introduction)) >> Description and Operation >> Fuel System Description >> Starting Mode
September 30: LEMON manuals is back up on a temporary server! Slowness is possible

Starting Mode

WARNING: This page is about a different car, the 2004 Chevrolet Monte Carlo and 2004 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

When the ignition is first turned ON, the PCM energizes the fuel pump relay for 2 seconds. This allows the fuel pump to build pressure in the fuel system. The PCM calculates the air/fuel ratio based on inputs from the engine coolant temperature (ECT), mass air flow (MAF), manifold absolute pressure (MAP), and throttle position (TP) sensors. The system stays in starting mode until the engine speed reaches a predetermined RPM.

scientia non olet · About LEMON Manuals