TROUBLESHOOTING GUIDE — 3 CRANKS NORMALLY BUT WILL NOT START (PARTIAL COMBUSTION) — WHEN ENGINE COLD
F2-23flowchart3 CRANKS NORMALLY BUT WILL NOT START (PARTIAL COMBUSTION) — WHEN ENGINE COLD
DESCRIPTION: Engine cranks at normal speed but shows only partial combustion and will not continue to run. Battery in normal condition. Fuel in tank.
NOTE
[TROUBLESHOOTING HINTS] (1) Air/fuel mixture too rich — Air cleaner element clogged; Volume air flow sensor stuck. (2) Air/fuel mixture too lean — Fuel injection control malfunction (correction for coolant temperature); Low fuel line pressure; Air leakage of intake-air system. (3) Low engine compression.
CRANKS NORMALLY BUT WILL NOT START (PARTIAL COMBUSTION) — WHEN ENGINE COLD
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 strong blue spark visible at each disconnected high-tension lead? (page F2-113)
No
Check distributor cap and rotor (section G)
Yes — Go to next step
3
STEP 3: Connect data link connector terminals F/P and GND by using jumper wire; is fuel line pressure correct with ignition switch ON? (page F2-107). Fuel line pressure: 260—310 kPa {2.6—3.2 kgf/cm2, 37—45 psi}
No
4
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 not clogged, check fuel pump maximum pressure (page F2-110). High pressure: Is fuel return hose clogged or restricted? If it is not, replace pressure regulator (page F2-115). If it is, repair or replace it.