Troubleshooting Guide
F2-53flowchartF2 section = 1.8L K8-ZE V6 engine.
Troubleshooting Guide (STEP 6–9)
1
STEP 6: Is intake manifold vacuum correct at idle? Intake manifold vacuum: More than 450 mmHg (17.7 inHg)
No
Check for air leakage of intake air system components
Yes
2
STEP 7: Is air cleaner element clean? (page F2-70)
No
Replace air cleaner element
Yes
3
STEP 8: Is fuel line pressure correct at idle? (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
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). High pressure: Is fuel return line clogged? If it is not, replace pressure regulator (page F2-115). If it is, replace it
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). High pressure: Is fuel return line clogged? If it is not, replace pressure regulator (page F2-115). If it is, replace it
Yes
4
Does fuel line pressure decrease during quick acceleration? If it does, check fuel pump maximum pressure (page F2-110). If pressure is OK, check fuel line and filter for clogging. If it does not, go to next step
go to next step
5
STEP 9: Is volume air flow sensor OK? (page F2-150) I. Does measuring core move smoothly? II. Check resistance
No
6
Repair or replace volume air flow sensor
Volume air flow sensor resistance (Step 9 II)
E2 ↔ VS
Closed throttle position Resistance (Ω)200–1000
Wide open throttle Resistance (Ω)20–800
E2 ↔ VC
Closed throttle position Resistance (Ω)200–400
Wide open throttle Resistance (Ω)200–400