Symptom Definition

Momentary lack of response when accelerator is pushed down. Can occur at any vehicle speed. Usually occurs after a stop. If severe enough, may cause engine to stall.

Possible Causes & Corrections:

• Check for faulty spark plug wires. Check for fouled spark plugs.
• Check for open in ignition system ground circuit. Ensure initial ignition timing is correct.
• Ensure fuel pressure is correct in all speed ranges.
• Check for poor fuel quality or water-contaminated fuel.
• Ensure TP sensor does not stick or bind. Voltage should increase at a steady rate as throttle is moved toward wide open throttle.
• Check MAP sensor response and accuracy. See appropriate SYSTEM/COMPONENT TESTING article for specific testing procedures.
• SYSTEM/COMPONENT TESTS - 2.2L
• SYSTEM/COMPONENT TESTS - 3.1L
• SYSTEM/COMPONENT TESTS - 3.8L
• SYSTEM/COMPONENT TESTS - 4.3L
• SYSTEM/COMPONENT TESTS - 5.0L
• SYSTEM/COMPONENT TESTS - 5.7L
• SYSTEM/COMPONENT TESTS - 7.4L
• Check canister purge system for proper operation.
• Check EGR valve for proper operation.
• Ensure correct PROM is installed in PCM. Check dealer for latest application.
• Check charging system output. Repair if output is less than 9 volts or greater than 16 volts.