Engine cranking but not starting?

Hello, it sounds like the high-pressure pump has gone bad. Can you verify which engine this car has? I am only finding a 1.8 and 2.0 size engine, both being 4-cylinder engines. Please let me know and I can provide instructions.

William

Hello, actually the vehicle is Hyundai grandeur with 6 cylinder.
I could not find the model in the selection list, so I chose Elantra.

Hi,

Thanks for clarifying, the Hyundai Grandeur is also the Azera in the United States. I will list the procedures for the high-pressure fuel pump removal below, with pictures attached at the bottom. Please let us know if you have any further questions. Thanks!

Removal

WARNING:
In case of removing the high-pressure fuel pump, high pressure fuel pipe, delivery pipe, and injector, there may be injury caused by leakage of the high-pressure fuel. So don't do any repair work right after the engine stops.

1. Turn the ignition switch OFF and disconnect the battery negative (-) cable.
2. Release the residual pressure in the fuel line.


CAUTION:
When removing the fuel pump relay, a Diagnostic Trouble Code (DTC) may occur.
Delete the code with the GDS after completion of "Release Residual Pressure in Fuel Line" work.

3. Remove the pump foam (A).

4. Disconnect the fuel pressure control valve connector (A) and the fuel feed tube quick-connector (B).

5. Remove the intake manifold.

6. Remove the injector foam (A).

7. Remove the high pressure fuel pipe.
(1)Remove the high pressure pipe flange nut in order of A,B with the special service tool [SST No.: 09314-3V100]
(2)Remove the high pressure pipe bracket bolt (A)
(3)Remove the function block installation bolt (A).

8. Remove the installation bolts (A) and then remove the high-pressure fuel pump (B) from the cylinder head assembly.

CAUTION:
Unscrew in turn the two bolts in small step (0.5 turns). In case of fully unscrewing one of the two bolts with the other bolt installed, the housing surface of the cylinder head may be broken because of tension of the pump spring.

William

Thank you very much.
However, could there be any way to test the high-pressure fuel pump?

It sounds like you did test it, if I understood your procedure correctly. If you removed the high-pressure line going from the pump to the rail, and the pressure is very low, it sounds like the pump is not working. It is mechanical so it will only generate pressure while the engine is turning. Alternatively, what I like to do is monitor the fuel pressure with a scan tool while the engine is cranking, the high-pressure pumps should generate a massive amount of pressure.

Hope this helps,
William

I removed the high-pressure line on the high-pressure pump and cranked the engine, there was very little fuel coming out from the pump to the nozzle but there is massive pressure built up on the low-pressure line at the high-pressure pump.

Typically the low-pressure line should be around 50 PSI, which is considered normal pressure from the fuel pump in the tank. If the pressure is low between the high-pressure pump and the engine, then I would replace the high-pressure pump.

William

I will update you soon.