System Inspection

System Inspection

1. Check for restriction in intake system
(1) Visually/physically inspect the blocking in intake system for following items
- Throttle body gasket and damage
- Blocking in intake manifold and injector caused by any foreign substance
(2) Is a problem present?
YES
- Repair or replace as necessary and go to "Verification of Vehicle Repair" procedure.
NO
- Go to" Check fuel pressure" as follows.
2. Check fuel pressure

CAUTION:
1. Be cautious that Fuel is explosive and an empty fuel tank can still contain explosive gases. When working on fuel system make sure to supply adequate ventilation
to the work area. Do not smoke, and keep sparks and open flames away.
2. The fuel system remains under pressure when the engine is not running. Release fuel system pressure before disconnecting any fuel line to reduce the chance of personal injury or fire damage to vehicle components.

(1) IG "OFF" and disconnect Fuel Pump Relay in Junction Box.
(2) Start the engine and wait for the engine to stall.
(3) IG "OFF" and connect Fuel Pump Relay.
(4) Install the fuel pressure gauge to the delivery pipe with the fuel pressure gauge adaptor.
(5) Activate the fuel pump, and with fuel pressure applied, check that there is no fuel leakage from the pressure gauge or connection part.
(6) Measure the fuel pressure at idle.
A. Specifications : 374.6 - 384.4 kPa (3.82 - 3.92 kg/cm2, 54.3 - 55.8 psi)
(7) Is the measured fuel pressure within specifications ?
YES
- Go to "Check fuel leakage in injector" as follow.
NO
- Repair or replace according to the table indicated below. And then, go to" Verification of Vehicle Repair"procedure.





3. Check fuel leakage in injector
(1) IG "OFF" after checking the fuel pressure test.
(2) Stop engine and check for a change in the fuel pressure gauge reading for 5 minutes.
A. Specification : After engine stops, fuel gauge reading is maintained for 5 minutes.
(3) Is the fuel gauge reading maintained ?
YES
1) Clear DTC and Test-drive under enable conditions above-mentioned. After the test, If this DTC is set, go to "Inspection & Repair" procedure. If not, troubleshooting is completed.
NO
1) There is a fuel leakage in injector. Repair or replace as necessary and go to" Verification of Vehicle Repair" procedure.