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The best way to test a fuel pump for proper operation is to perform a fuel pressure test. Tee-in a temporary fuel pressure gauge between the output of the fuel filter and the fuel rail.
The readings at idle for your car should approximately be as follows:
  • with vacuum hose connected to the fuel pressure regulator: 34 psi
  • with vacuum hose disconnected from the fuel pressure regulator: 43 psi
 

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Admin and Sup Mod keeping the peace
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p.s. to be clear, in ON position, I hear pump is pumping the fuel. I checked all fuses, relays. Some wirings. I have spark as well. In stalled new spark plug wires. Car do cranks, belt rotates --> so starter seems to be engaged. I am thinking that IACV can be stack? But until removing it [sort of hard removal], I'd like to exclude other possibilities (which are simpler to do in this cold wheather :) )
Also, I already removed injector rail, cleaned injectors and reinstalled.

any ideas appreciated
The fuel injectors may not be getting pulsed by the ECU; you can test each injector with a "NOID light probe tester" to see if it's pulsing. The probe kit can be puchased at most auto parts stores or online at Amazon.com. Each injector has two wires; one is the signal wire and the other is a constant 12volts; test each injector for 12v with a multimeter.
Thanks. But problem is, my car wont start. I am not sure that with no-start you can properly perform this test..
I appreciate Any suggestion and share of experience.
You CAN test the fuel pump with the fuel pressure gauge while the engine is not running. Tee-in a temporary fuel pressure gauge between the output of the fuel filter and the fuel rail. Turn the ignition key to the RUN position but DO NOT TRY TO START THE ENGINE. The fuel pressure reading should be around 43 psi which would be a static reading.
 

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Admin and Sup Mod keeping the peace
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With the engine shut off, if the fuel pressure gauge shows a good static pressure, that shows that the FPR is maintaining the pressure, meaning it's OK up to that point; further testing of the FPR should be performed once you're able to start the engine. If the fuel pressure is very low or zero, then the FPR or the fuel pump is bad.
 
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