The Mono-Jetronic central fuel injection system is fitted to the 1.8 litre (code RP) engine. It is a simplified method of fuel injection (see illustrations). Fuel is injected into the inlet manifold by a single solenoid valve (fuel injector) mounted centrally in the top of the injector unit housing.
The length of time for which the injector remains open determines the quantity of fuel reaching the cylinders for combustion. The electrical signals which determine the fuel injector opening duration are calculated by the Electronic Control Unit (ECU) from information supplied by its network of sensors. Fuel pressure is regulated mechanically.
The signals fed to the ECU include the following:
a) The engine coolant temperature
b) The engine speed and crankshaft position - from the distributor
c) The position of the throttle valve plate - from the throttle position sensor
d) The oxygen content in the exhaust gases - via a sensor (Lambda probe) in the exhaust manifold
Using the information gathered from the various sensors, the ECU sends out signals to control the system actuators as required. The ECU also has a diagnostic function which can be used in conjunction with special VW test equipment for fault diagnosis. With the exception of basic checks to ensure that all relevant wiring and hoses are in good condition and securely connected, fault diagnosis should be entrusted to a VW dealer. Basic testing can be carried out on the system components covered in the following text. More detailed testing can be carried out by using specialised equipment but this must be entrusted to a VW dealer.
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Showing posts with label throttle position sensor. Show all posts
Showing posts with label throttle position sensor. Show all posts
Wednesday, May 5, 2010
Monday, May 3, 2010
Acura GSR Whirlwind Intake Manifold Instructions
Removal
1. Relieve the fuel pressure in the system by loosening the banjo bolt on the top of the fuel filter. Disconnect the fuel line from the fuel rail. It is a good idea to replace the washers. Disconnect the fuel harness holder and unbolt. Disconnect the hoses from the fuel pressure regulator (FPR).
2. Disconnect intake hose/pipe from throttle body. Disconnect all hoses leading to the throttle body and intake manifold. Disconnect throttle cable bracket on manifold and throttle cable from throttle body. Disconnect the cables to the the throttle position sensor (TPS) and the map sensor on the throttle body.
3. Unbolt two lower intake manifold bolts that secure manifold to engine block. This bracket willl still be used to accommodate the heater bypass pipe. Unbolt manifold from engine block. Remove manifold, throttle body, and fuel rail as one unit.
4. Remove the intake air bypass (IAB) vacuum tank, check valve and control solenoid unit. Due to the different design of your new manifold, these parts will no longer be used. Do not remove the FPR hose. This hose will be used in the re-installation process.
5. Unbolt throttle body from manifold. Inspect gasket and replace if needed. Unscrew throttle body studs from flange of manifold. Remove fuel rail assembly from manifold.
6. From original manifold, unbolt and remove idle air control valve (IAC), intake air temperature valve (IAT), and o-rings. Replace o-rings if needed. Remove fuel rail studs from original manifold.
Assembly
1. Screw throttle body studs and fuel rail studs removed from original manifold into the new Power+Plus Manifold.
2. Bolt throttle body to new manifold. When positioning throttle body gasket, the U-shaped portion is in top left corner of flange.
3. Bolt idle air control valve, intake air temperature valve with o-rings to new manifold. Install fuel rail, making sure o-rings are positioned correctly to prevent fuel leakage.
4. Position new manifold assembly with throttle body and fuel rail back on the cylinder head over the studs, making sure new intake gasket is properly positioned. Connect the EVAP purge control solenoid valve. Due to the new intake manifold design, there is no mounting location for for the EVAP purge control solenoid valve. It can be zip-tied to a secure location. For 1994-’95 vehicles, one hose end will plug into the charcoal canister and the other hose end will plug into the small vacuum fitting located onthe rear of the new intake manifold. For 1996-01 vehicles. see notes below.
5. Bolt on the fuel injector harness holder and hoses, connecting the harness to the injectors. Connect TPS, map sensor, and fuel line. The FPR hose will connect to the small vacuum fitting that was originally on the front of the manifold but is now on the back. Tighten banjo bolt on top of fuel filter.
6. Use the new supplied throttle cable bracket to hook up stock throttle cable to the throttle body.
7. Connect battery and replace coolant. Cap off any unused vacuum tubes with vacuum caps.
8. Start engine, check for leaks. After engine is brought to operating temperature, shut it off and check that all nuts and bolts are tight. Retighten manifold bolts after 500 miles.
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1. Relieve the fuel pressure in the system by loosening the banjo bolt on the top of the fuel filter. Disconnect the fuel line from the fuel rail. It is a good idea to replace the washers. Disconnect the fuel harness holder and unbolt. Disconnect the hoses from the fuel pressure regulator (FPR).
2. Disconnect intake hose/pipe from throttle body. Disconnect all hoses leading to the throttle body and intake manifold. Disconnect throttle cable bracket on manifold and throttle cable from throttle body. Disconnect the cables to the the throttle position sensor (TPS) and the map sensor on the throttle body.
3. Unbolt two lower intake manifold bolts that secure manifold to engine block. This bracket willl still be used to accommodate the heater bypass pipe. Unbolt manifold from engine block. Remove manifold, throttle body, and fuel rail as one unit.
4. Remove the intake air bypass (IAB) vacuum tank, check valve and control solenoid unit. Due to the different design of your new manifold, these parts will no longer be used. Do not remove the FPR hose. This hose will be used in the re-installation process.
5. Unbolt throttle body from manifold. Inspect gasket and replace if needed. Unscrew throttle body studs from flange of manifold. Remove fuel rail assembly from manifold.
6. From original manifold, unbolt and remove idle air control valve (IAC), intake air temperature valve (IAT), and o-rings. Replace o-rings if needed. Remove fuel rail studs from original manifold.
Assembly
1. Screw throttle body studs and fuel rail studs removed from original manifold into the new Power+Plus Manifold.
2. Bolt throttle body to new manifold. When positioning throttle body gasket, the U-shaped portion is in top left corner of flange.
3. Bolt idle air control valve, intake air temperature valve with o-rings to new manifold. Install fuel rail, making sure o-rings are positioned correctly to prevent fuel leakage.
4. Position new manifold assembly with throttle body and fuel rail back on the cylinder head over the studs, making sure new intake gasket is properly positioned. Connect the EVAP purge control solenoid valve. Due to the new intake manifold design, there is no mounting location for for the EVAP purge control solenoid valve. It can be zip-tied to a secure location. For 1994-’95 vehicles, one hose end will plug into the charcoal canister and the other hose end will plug into the small vacuum fitting located onthe rear of the new intake manifold. For 1996-01 vehicles. see notes below.
5. Bolt on the fuel injector harness holder and hoses, connecting the harness to the injectors. Connect TPS, map sensor, and fuel line. The FPR hose will connect to the small vacuum fitting that was originally on the front of the manifold but is now on the back. Tighten banjo bolt on top of fuel filter.
6. Use the new supplied throttle cable bracket to hook up stock throttle cable to the throttle body.
7. Connect battery and replace coolant. Cap off any unused vacuum tubes with vacuum caps.
8. Start engine, check for leaks. After engine is brought to operating temperature, shut it off and check that all nuts and bolts are tight. Retighten manifold bolts after 500 miles.
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Friday, April 30, 2010
1992 Mitsubishi Engine 4G61 4G63 4G64 Service Manual
Part Content:Lubrication system oil pump type cooling system water pump type and number, throttle position sensor, closed throttle position switch. Total resurfacing depth both cylinder head and cylinder block, overall height. The camshaft identification mark is stamped on the rear end of the camshaft, fuel pump driving cam diameter journal diameter.
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