Diagnostic Procedure 13 — Engine Stalls when Stepping on the Accelerator Momentarily
EF & EC-449flowchartSR20DE engine. Uses CONSULT ACTIVE TEST mode.
TROUBLE DIAGNOSES
Diagnostic Procedure 13 — Engine Stalls when Stepping on the Accelerator Momentarily
1
CHECK A.A.C. VALVE. 1. Select 'A.A.C. VALVE OPENING' in 'ACTIVE TEST' mode. 2. When touching 'Qu' and 'Qd', does the engine speed change according to the percent of A.A.C. valve opening? — OR — When disconnecting A.A.C. valve harness connector, does the engine speed drop?
No
Check A.A.C. valve and circuit. (See page EF & EC-506.)
Yes
2
PERFORM POWER BALANCE TEST. 1. Perform 'POWER BALANCE' in 'ACTIVE TEST' mode. 2. Is there any cylinder which does not produce a momentary engine speed drop? — OR — When disconnecting each injector harness connector one at a time, is there any cylinder which does not produce a momentary engine speed drop?
Yes
Go to 5 (next page).
No
3
CHECK INJECTOR. 1. Remove distributor from engine. (Crank angle sensor harness connector should remain connected.) 2. Disconnect ignition wires. 3. Turn ignition switch ON. (Do not start engine.) 4. When rotating distributor shaft slowly by hand, does each injector make an operating sound?
No
Check injector(s) and their circuit(s).
Yes
4
Go to A on next page.