Diagnostic Procedure 15 — Engine Stalls when Accelerating or when Driving at Constant Speed (Cont'd)
EF & EC-279flowchartDiagnostic Procedure 15 (Cont'd)
1
A (from previous page)
2
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 pump, circuit and fuel pressure regulator.
O.K.
3
CHECK FOR INTAKE AIR LEAK. When pinching blow-by hose (lowering the blow-by air supply), does the engine speed rise?
Yes
Discover air leak location and repair.
4
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.
5
CHECK E.C.U. POWER SUPPLY AND GROUND CIRCUIT. Refer to page EF & EC-286.
Yes
same as step 4
No
6
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.