Symptom Definition

Engine starts okay but dies after brief idle, as soon as any load is placed on engine (such as turning on air conditioner or engaging transmission) or on initial drive-away.

Possible Causes & Corrections: 

• Ensure Torque Converter Clutch (TCC) is not stuck on.
• Check brakelight switch operation.
• Check PCV valve for proper operation.
• Check for plugged or restricted fuel lines.
• If engine starts but then immediately stalls, open distributor by-pass circuit. If engine now starts and runs okay, replace distributor pick-up coil.
• Using Spark Tester (ST-125), check for a weak spark from ignition coil.
• Check Idle Air Control (IAC) system for proper operation.
• Unplug MAP sensor. PCM substitutes a default value for sensor signal. If stall condition is eliminated, replace sensor.
• Check EGR system for proper operation.
• If stall occurs when air conditioner is turned on, check for air conditioner clutch signal to PCM terminal. Voltage at A/C terminal of PCM should be battery voltage when air conditioner compressor clutch is engaged. A high voltage surge due to a shorted compressor clutch diode could cause PCM shutdown.
• Check for an overcharged A/C system.