TROUBLESHOOTING GUIDE — 7 CRANKS NORMALLY BUT HARD TO START — AFTER WARM-UP
F2-31flowchart7 CRANKS NORMALLY BUT HARD TO START — AFTER WARM-UP
DESCRIPTION: Engine cranks at normal speed but requires excessive cranking time before starting after running and being hot soaked. Battery in normal condition. Engine starts normally when cold. Engine runs normally at idle (If idle condition is not OK, refer to "Rough Idle" [No. 8-12]).
NOTE
[TROUBLESHOOTING HINTS] (1) Air/fuel mixture too rich — Fuel injection control malfunction; Fuel injector fuel leakage. (2) Vapor lock — Fuel pressure not held in fuel line after engine stopped; Pressure regulator control system malfunction.
CRANKS NORMALLY BUT HARD TO START — AFTER WARM-UP (steps 1-4)
1
STEP 1: Is "00" displayed on SST with ignition switch ON? (page F2-73). Self-Diagnosis Checker / System Selector.
No
Diagnostic trouble code No. displayed. Check for cause (Refer to specified check sequence) (page F2-74)
Yes ("00" displayed) — Go to next step
2
STEP 2: Remove vacuum hose from pressure regulator and plug it. Does engine start normally?
Yes
Check pressure regulator control system (page F2-113)
No — Go to next step
3
STEP 3: Are ECM terminal voltages OK? 1C-Starter signal; 2E-Engine coolant temperature sensor; 3D-Sensor ground (page F2-141)
No
Check for cause (page F2-141)
Yes — Go to next step
4
STEP 4: Run engine at idle; does fuel line pressure held after ignition switch is turned OFF? Fuel line pressure: More than 150 kPa {1.5 kgf/cm2, 21 psi} for 5 min.
No
5
Plug outlet of pressure regulator outlet; is fuel line pressure held after ignition switch is turned OFF? (page F2-108). If it does, replace pressure regulator (page F2-115). If it does not, check fuel pump hold pressure (page F2-111). If fuel pump is OK, check fuel injectors for fuel leakage (page F2-116)