How to Test a Fuel Delivery System?

= This teaching is one of most important if you have auto, so that you can analyze the problem of your car by your own.Some technical teaching has involve money or you have to enroll first in technical school. but I give you this for free, Thanks a lot for visiting my site and hope that this is not the first and last to visit me.
= Some problem of car due to fuel system.

1. Engine not Starting but cranking.
2. Engine suddenly cut off during driving.
3. Engine rough idling.
4. Engine poor acceleration.
5. Engine stalling etc.

Fuel Delivery System
Fuel Line:
A) Fuel Pressure Test

1. Reduce the internal pressure of the fuel lines and hoses
   a) Disconnect the pump harness connector.
   b) Start the engine and after it stalls, turn the ignition to switch off position.
   c) Disconnect the battery negative terminal.
   d) Connect the fuel pump connector.
2. Remove the bolt connecting the fuel line to the fuel delivery pipe.
   
   Caution:
   = Cover the hose connection with a shop towel to prevent splashing of fuel caused by residual pressure in the fuel line.
   
3. Using the fuel pressure gauge adaptor, install the fuel pressure gauge (A) to the fuel pressure gauge adaptor (B). tighten the bolt.
   
   Fuel pressure gauge to fuel delivery pipe
   24~35 Nm(250~350kg.cm, 18~26 lb.ft)
   
4. Connect the battery’s negative(-) terminal.
5. Apply battery voltage to the terminal for the pump drive and activate the fuel applied, check the that there is no fuel leakage form the pressure gauge or connection part.
6. Start and run the engine at curb idle speed.
7. Disconnect the vacuum hose from the fuel pressure regulator, and plug the hose end. measure the fuel pressure at idle.
   
   Standard Value:
   320~340 kPa (3.26~3.47kg/cm , 46~49 psi).
   
8. Measure the pressure when the vacuum hose is connected to the pressure regulator.
   
   Standard value:
   Approx.225 kPa (2.57 kg/cm 37 psi
   
9. If the result of the measurement made in 7 step and 8 are not within the standard value, Use the next table to determine the probable cause , and make the necessary repairs.

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