Engine shuts off while driving

Hi and thanks for using 2CarPros.

It could be several different things. However, the first thing I would suspect is a fuel related issue. Can you tell me if the engine starts right back up.

First, does the check engine light stay on while the engine is running? If it does, you need to have the computer scanned to identify diagnostic trouble codes. Here is a quick video that shows how that is done:

https://youtu.be/YV3TRZwer8k

I realize most people don't own a scanner, but often times parts stores will do it for free. If the light is on and you get the codes, let me know what they are.

Next, here is a link that discusses possible causes of the symptoms you described. Take a look through it to see if it helps.

https://www.2carpros.com/articles/engine-stalls

Now, I would also recommend checking fuel pressure. 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

Here are the specific directions for your vehicle to check fuel pressure. The attached pictures correlate with these directions and the pressure specs are included in the directions. Keep in mind, even a partially plugged fuel filter can cause the problem.

_________________________________

FUEL PRESSURE INSPECTION

CHECK FUEL PRESSURE
(a)Check the battery positive voltage is above 12 V.
(b)Disconnect the negative (-) terminal cable from the battery.

see picture 1

(c)Remove the union bolt and 2 gaskets and disconnect the fuel inlet hose from the fuel filter outlet.

CAUTION:
- Put a shop towel under the fuel filter.
- Slowly loosen the union bolt.

see [oc 2

(d)Install the fuel inlet hose and SST (pressure gauge) to the fuel filter outlet with the 3 gaskets and SST (union bolt). SST 09268-45012

Torque: 29 N.m (300 kgf.cm, 21 ft.lbf)

(e)Wipe off any splattered gasoline.
(f)Reconnect the negative (-) terminal cable to the battery.
(g)Connect the TOYOTA hand-held tester to the DLC3.
(h)Measure the fuel pressure.

Fuel pressure: 301 - 347 kPa (3.1 - 3.5 kgf/sq.cm, 44 - 50 psi)

If pressure is high, replace the fuel pressure regulator. If pressure is low, check these parts:
- Fuel hoses and connections
- Fuel pump
- Fuel filter
- Fuel pressure regulator

(i)Disconnect the TOYOTA hand-held tester from the DLC3.
(j)Start the engine.
(k)Measure the fuel pressure at idle.

Fuel pressure: 301 - 347 kPa (3.1 - 3.5 kgf/sq.cm, 44 - 50 psi)

(l)Stop the engine.
(m)Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.

Fuel pressure: 147 kPa (1.5 kgf/sq.cm, 21 psi) or more

If pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.
(n)After checking fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST to prevent gasoline from splashing. SST 0926-45012
(o)Reconnect the fuel inlet hose with 2 new gaskets and the union bolt.

Torque: 29 N.m (300 kgf.cm, 21 ft.lbf)

(p)Reconnect the negative (-) terminal cable to the battery.
(q)Check for fuel leakage.

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

Take care,
Joe