Fuel pressure is causing fuel pushing though injectors

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If the fuel pressure is that high, it wouldn't be running. Also, hi pressure is the result of a faulty fuel pressure regulator. If the smoke is truly white, that is usually an indicator that coolant is entering the combustion chamber, usually the result of a blown head gasket. With that in mind, here is a link that shows how to check for a bad head gasket:

https://www.2carpros.com/articles/head-gasket-blown-test

Next, I strongly recommend confirming the fuel pressure it too high and to test the regulator. Here is a link that shows in general how it is done:

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

Now, if the fuel pressure is very high, then the regulator is the problem. The main issue is that the regulator is part of the fuel pump on this vehicle. Here are the directions for replacing it:

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Fuel Pressure Regulator
picture 1

The fuel pressure regulator is part of the fuel pump module. Remove the fuel pump module from the fuel tank to access the fuel pressure regulator. Refer to the Fuel Pump Module removal.

WARNING: FUEL SYSTEM PRESSURE MUST BE RELEASED BEFORE SERVICING ANY FUEL SYSTEM COMPONENT. PERFORM THE FUEL SYSTEM PRESSURE RELEASE PROCEDURE.

REMOVAL
1. Spread tangs on pressure regulator retainer.
2. Pry fuel pressure regulator out of housing.
3. Ensure both upper and lower O-rings were removed with regulator.

INSTALLATION

Fuel Pressure Regulator O-rings
picture 2

1. Lightly lubricate the O-rings with clean engine oil and place them into opening in pump module.
2. Push regulator into opening in pump module.
3. Fold tangs on regulator retainer over tabs on housing.

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Let me know if this helps or if you have other questions. Also, make sure to check if the coolant level is low indicating a possible head gasket issue.

Take care,
Joe