GEN II P3190 DTC Engine Stalling, No start. PLEASE HELP...

The DTC'S for P3190 gives a long list of possibilities:
- Intake system
- Throttle body assembly
- Fuel pressure
- Engine
- Mass air flow meter subassembly
- Out of fuel
- Engine coolant temperature sensor
- Crankshaft position sensor
- Camshaft position sensor
- EGR valve assembly
- ECM

Good luck. Hopefully someone like Patrick will give you some specifics to try.

 

I have heard about dodgy fuel pumps on the Prius.

 

How many miles on the odometer?
How much fuel in the fuel tank?
Can you smell unburnt gasoline in the exhaust after you have tried to start the engine? (If not, this would imply your fuel injectors are not injecting fuel.)
Have you confirmed that the spark plugs are firing? If not, remove one igniter and plug. Make sure the igniter wiring harness connector is attached securely, insert the plug into the igniter and ground the threaded shell of the plug to the engine. While you have someone try to start the car, see if the plug tip is sparking.

A no-start problem that comes out of nowhere is usually the result of no fuel or no ignition.

 

First thing I would check is fuel line pressure (is fuel pump running and fuses intact) do you smell fuel at the exhaust. Carefully open the fuel line to the injectors to check for pressure in the absents of a gauge.
Second crank shaft sensor.

 

My reply is here:
GEN II P3190 DTC Engine Stalling, No start. PLEASE HELP... | PriusChat

Please do not post in multiple forums on the same subject.

 

moved

 

Maybe think of it like any ICE engine that won't start..

Is it possible you got bad gas? ie. water in gas? Has it rained.. Not sure if gen ii have the problem with water sitting on top of intake and soaking around the coil packs.

Spark plugs look ok? Coil packs working? I'm assuming the new throttle body came with new motor and throttle sensor. Have you tried spraying starting fluid (ether) into the air box?

 

It is better to drop a little fuel down the throttle body than use starting fluid.

 

In all my experience with cars that have trouble starting from fuel issues (including lawn mowers) I find this to not be true. You can easily tell when a car is running on starting fluid and confirm the engine runs perfectly fine, but just isn't getting fuel.

 

I have seen starting fluid destroy a petrol engine it is really a product for tired diesel engines even low levels of compression will ignite it no spark required.

 

Try to start it once then pull the sparkplug to see if you smell any fuel.

If you don't smell fuel in the exhaust pipe, then maybe you should start checking the fuel pump fuse or relay (swap relay with identical one in relay box). But check the spark plug for a spark as mentioned (hard to see in direct sunlight, fyi

 

When you removed a spark plug, if you do not smell any fuel vapor coming up from the cylinder then it sounds like your engine's problem is lack of fuel.

Check the following fuses by using an ohmmeter: 7.5A IGN, 15A EFI, 15A AM2, 10A ETCS. Make the Prius READY and see if you can measure 12V on one side of the fuse holder, when the fuse is removed.

If the fuses are good and you have 12V present, then maybe the fuel pump relay (aka circuit opening relay) is at fault.

If you were working on a Classic Prius it would be easy to find the circuit opening relay in the fuse box near the inverter.

However, it's not easy to swap the circuit opening relay in 2G Prius because that relay is one of four in a rectangular box marked "Unit C". This is located in the main relay/fuse box near the inverter.

 

I suggest you go to the fuse box next to the inverter and look for two black rectangular boxes, one with fuses in it and one without. These boxes are next to each other. Each box has tabs at the end which lock it in place, push those tabs away from the box and pull the box out, do this with both boxes. Swap them with the other car and report back. One of those is the fuel pump relay which can go bad.

Avi