Subaru Crosstrek Service Manual: Intake manifold vacuum Inspection
MECHANICAL(H4DO) > Intake Manifold Vacuum
INSPECTION
1. Turn the ignition switch to OFF.
2. Warm up the engine.
3. Install the vacuum gauge.
(1) Remove the brake booster vacuum hose from the intake manifold.
(2) Connect the vacuum gauge to the intake manifold.
4. Keep the engine at idle speed and read the vacuum gauge indication.
NOTE:
Condition of engine inside can be diagnosed by observing the behavior of the vacuum gauge needle as described in table below.
Intake manifold vacuum (at idling, A/C OFF):
Standard
−60.0 kPa (−450 mmHg, −17.72 inHg) or more
Diagnosis of engine condition by inspection of intake manifold vacuum | |
Vacuum gauge needle behavior | Possible engine condition |
1. Needle is steady but lower than standard value. This tendency becomes more evident as engine temperature rises. | Leakage around intake manifold gasket, disconnection or damage of vacuum hose |
2. Needle intermittently drops to position lower than standard value. | Leakage around cylinder |
3. Needle drops suddenly and intermittently from standard value. | Sticky valve |
4. When engine speed is gradually increased, needle begins to vibrate rapidly at certain speed, and then vibration increases as engine speed increases. | Weak or broken valve springs |
5. Needle vibrates above and below standard value in narrow range. | Defective ignition system |
5. After inspection, install the related parts in the reverse order of removal.
Intake and exhaust valve Specification
MECHANICAL(H4DO) > Intake and Exhaust ValveSPECIFICATIONRefer to “Cylinder Head” for removal and installation procedures of the intake and exhaust valves. Cylinder Head > REMOVAL&qu ...
Piston Specification
MECHANICAL(H4DO) > PistonSPECIFICATIONRefer to “Cylinder Block” for removal and installation procedures of pistons. Cylinder Block > REMOVAL"> Cylinder Block > INSTALLAT ...
Other materials:
Dtc p0111 intake air temperature sensor 1 circuit range/performance bank 1
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P0111 INTAKE AIR TEMPERATURE SENSOR 1 CIRCUIT RANGE/PERFORMANCE BANK 1DTC detecting condition:Detected when two consecutive driving cycles with fault occur.Trouble symptom:• Improper idling• Poor d ...
Low fuel warning light
The
low fuel warning light illuminates
when the tank is nearly empty, at approximately
2.6 US gal (10.0 liters, 2.2 Imp gal).
It only operates when the ignition switch is
in the "ON" position.
CAUTION
Promptly put fuel in the tank whenever
the low fuel warning light
illuminates. Engine ...
Removal
CONTINUOUSLY VARIABLE TRANSMISSION(TR580) > Transmission Mounting SystemREMOVAL1. PITCHING STOPPER1. Disconnect the ground cable from battery. NOTE">NOTE:For model with battery sensor, disconnect the ground terminal from battery sensor.2. Remove the clip (A) from the air intake boot.3. L ...
