Jerking and will not start

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Since it started using a lot more gas, I question if the fuel pressure regulator is bad and allowing too much pressure to reach the fuel injectors.

If the check engine light was on, you really should start by scanning the computer to retrieve trouble codes. Here is a quick video showing how it is done.

https://youtu.be/YV3TRZwer8k

I realize most people don't own a scanner, but often times a parts store will lend or rent one to you.

Next, we need to confirm fuel pump pressure. Here is a quick link showing how both pressure and the regulator are checked.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

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Here are the directions specific to your vehicle for testing the fuel pressure. The attached pictures correlate with the directions. The directions also include general diagnostics based on findings.

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COMPONENT TESTS AND GENERAL DIAGNOSTICS
Fuel Pressure Test

1. Release the residual pressure in 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.

2. Install the Special Service Tool (SST).
(1)Disconnect the fuel feed tube from the high pressure fuel pump.

CAUTION:
There may be some residual pressure even after "Release Residual Pressure in Fuel Line" work, so cover the hose connection with a shop towel to prevent residual fuel from spilling out before disconnecting any fuel connection.

(2)Install the special service tool for measuring the fuel pressure in between the fuel feed tube and the high pressure fuel pump .

pic 1

3. Inspect fuel leakage on connections among the fuel feed tube, the high pressure fuel pump, and the SST components with IG ON.
4. Measure Fuel Pressure.
(1)Start the engine and measure the fuel pressure at idle.

Fuel Pressure:445 - 455 kPa (4.5 - 4.6 kgf/cm2, 64.5 - 66.0 psi)

NOTE:
If the fuel pressure differs from the standard value, repair or replace the related part .

pic 2

(2)Stop the engine, and then check for the change in the fuel pressure gauge reading.

Standard Value:The gauge reading should hold for about 5 minutes after the engine stops

NOTE:
If the gauge reading should not be held, repair or replace the related part .

pic 3

(3)Turn the ignition switch OFF.
5. Release the residual pressure in 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.

6. Test End
(1)Remove the Special Service Tool (SST) from the fuel feed tube and the high pressure fuel pump.
(2)Connect the fuel feed tube and the high pressure fuel pump.

Fuel Pressure Test

1. Release the residual pressure in 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.

2. Install the Special Service Tool (SST).
(1)Disconnect the fuel feed tube from the high pressure fuel pump.

CAUTION:
There may be some residual pressure even after "Release Residual Pressure in Fuel Line" work, so cover the hose connection with a shop towel to prevent residual fuel from spilling out before disconnecting any fuel connection.

(2)Install the special service tool for measuring the fuel pressure in between the fuel feed tube and the high pressure fuel pump .

pic 4
3. Inspect fuel leakage on connections among the fuel feed tube, the high pressure fuel pump, and the SST components with IG ON.
4. Measure Fuel Pressure.
(1)Start the engine and measure the fuel pressure at idle.

Fuel Pressure:480 - 520 kPa (4.9 - 5.3 kgf/cm2, 69.6 - 75.4 psi)

NOTE:
If the fuel pressure differs from the standard value, repair or replace the related part .

pic 5

(2)Stop the engine, and then check for the change in the fuel pressure gauge reading.

Standard Value:The gauge reading should hold for about 5 minutes after the engine stops

NOTE:
If the gauge reading should not be held, repair or replace the related part .

pic 6

(3)Turn the ignition switch OFF.
5. Release the residual pressure in 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.

6. Test End
(1)Remove the Special Service Tool (SST) from the fuel feed tube and the high pressure fuel pump.
(2)Connect the fuel feed tube and the high pressure fuel pump.

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Let me know if this helps or if you have other questions.

Take care,
Joe