Fuel and Emissions Systems Symptom Troubleshooting - Engine stalls - Diagnostic interview
Engine stalls?Diagnostic interview
Date
    
     
Place
    
     
1. Accessories/modifications
A: No modification
B: Modified
 
2. Situation when occurred
Booming noise, vibration occurs when deceleration, stopping, engine stalls
 
3. Situation when occurred
Engine stalls without vibrations as if stopped by turning off the ignition switch

Engine stalls condition?Possible cause pattern chart from diagnostic interview
 
Conditions when the engine stalls
Possible causes
Pattern 1
Accessories/modifications
''Hard to start engine'' or''engine stall'' sometimes occurs due to a fault in the ignition system, intake duct, intake manifold, or exhaust system.
(Intermittent failure may occur due to modification)
Pattern 2
Booming noise, vibration occurs when deceleration, stopping, engine stalls
The following intermittent failures may exist.
Intermittent failure of PGM-FI main relay 2
Faulty fuel supply (parameter ST FUEL TRIM)
Delay of EGR function (parameter EGR)
(only vehicles with EGR)
Delay of VTEC, VTC system function (parameter VTEC) (only vehicles with VTEC or VTC)
Delay of lock up operation (parameter SLIP RATIO OF TORQ OR STARTCLUTCH) (AT, CVT vehicles)
Pattern 3
Engine stalls without vibrations as if turning off the ignition switch
The following intermittent failures may exist.
Intermittent failure of ignition coil relay
Intermittent failure of PGM-FI main relay 1
Intermittent failure of PGM-FI subrelay