Diagnostic Procedure 13 — Engine Stalls when Stepping on the Accelerator Momentarily (Cont'd)
EF & EC-274flowchartApplies to GA16DE engine (header tag).
Diagnostic Procedure 13 — Engine Stalls when Stepping on the Accelerator Momentarily (Cont'd)
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(A) — continued from previous page
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4: CHECK IGNITION SPARK. 1. Disconnect ignition wire from spark plug. 2. Connect a known good spark plug to the ignition wire. 3. Place end of spark plug against an earth point with engine cranking. 4. Check for spark.
N.G.
Check ignition coil, power transistor unit and their circuits. (See page EF & EC-304.)
O.K.
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5: CHECK FUEL PRESSURE. 1. Release fuel pressure to zero. (Refer to page EF & EC-353.) 2. Install fuel pressure gauge and check fuel pressure. At idle: Approx. 245 kPa (2.45 bar, 2.5 kg/cm2, 36 psi). The moment throttle valve is fully open: Approx. 294 kPa (2.94 bar, 3.0 kg/cm2, 43 psi).
N.G.
Check fuel pressure regulator diaphragm.
O.K.
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6: CHECK E.C.U. HARNESS CONNECTOR. Check the E.C.U. pin terminals for damage or poor connection of E.C.U. harness connector.
N.G.
Repair or replace.
O.K.
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7: CHECK E.C.U. POWER SUPPLY AND GROUND CIRCUIT. Refer to page EF & EC-286.
N.G.
same as step 4
O.K.
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8: TRY A KNOWN GOOD E.C.U.*
INSPECTION END
NOTE
*: E.C.U. may be the cause of a problem, but this is rarely the case.