TROUBLESHOOTING GUIDE — 5 CRANKS NORMALLY BUT HARD TO START — ALWAYS
F2-27flowchart5 CRANKS NORMALLY BUT HARD TO START — ALWAYS
DESCRIPTION: Engine cranks at normal speed but requires excessive cranking time before starting. Battery is in normal condition. Engine runs normally at idle (If idle condition not OK, refer to "Rough Idle" [No. 8-1]).
NOTE
[TROUBLESHOOTING HINTS] (1) Air/Fuel mixture too lean — Fuel injection control malfunction (correct for coolant temperature); Low fuel line pressure; Air leakage. (2) Air/Fuel mixture too rich — Air cleaner housing element clogged; Volume air flow sensor stuck. (3) Poor ignition spark.
CRANKS NORMALLY BUT HARD TO START — ALWAYS (steps 1-5)
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: Is intake manifold vacuum at idle? Vacuum: More than 450 mmHg {17.7 inHg}
No
Check for air leakage of intake-air system components
Yes — Go to next step
3
STEP 3: Is air cleaner element clean? (page F2-70)
No
Replace air cleaner element
Yes — Go to next step
4
STEP 4: Does engine start easily when throttle valve is quarterly open?
Yes
Check throttle valve for carbon deposit, then go to step 6
No — Go to next step
5
STEP 5: Is fuel line pressure at idle correct? (page F2-113). Fuel line pressure: 260—310 kPa {2.6—3.2 kgf/cm2, 37—45 psi} (Vacuum hose to pressure regulator disconnected)
No
6
Low pressure: Check fuel line pressure while pinching fuel return hose. If pressure quickly increases, check pressure regulator (page F2-113). If pressure gradually increases, check for clogging between fuel pump and pressure regulator; if hose is not clogged, check fuel pump maximum pressure (page F2-110)