Fuel and Emissions Systems Symptom Troubleshooting - Engine stalls - Diagnostic interview

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

4. Situation when occurred

Outside temperature, engine temperature (cold/warmed-up), engine could restart right away or not, others

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 VTEC, VTC system function (parameter VTEC) (only vehicles with VTEC or VTC)

Delay of lock-up operation (parameter SLIP RATIO OF TORQ OR STARTCLUTCH)

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

Intermittent failure of ETCS control relay