P3190 - alone

When I want the pressure out, I just unplug one of the injectors with the car off and tickle it with a 9V battery and listen to the little squirt into the intake port. By the time I'm done with whatever I'm planning to do, that will have evaporated and won't cause a flooded-starting problem.

If it becomes a matter of reading the fuel pressure, that has to be done by plumbing a pressure gauge into the system. Even at a dealership they'll just unhook the hose at the firewall and MacGyver something up with a tee and fittings. They have part numbers if you want to do the same 'official' MacGyverage that they would.

There isn't a familiar alternator, but both motor-generators in the transaxle can generate power to charge the battery, and clearly if the engine won't start they're not doing that. Using the big high-voltage battery and a transaxle motor, the engine usually cranks for starting at such a high speed it sounds like it's already started, but if the car gives up after a period of time and stops cranking, then it often didn't really start at all.

Be careful about using up all the big-battery charge on wasted starting attempts. When it gets low enough the car will stop trying to start, and then you've got a bigger problem. Chargers for a 202-volt battery aren't in every corner store.

 

Yeah you've got to know start on an engine that is quite a character there's a lot of stuff goes on with this one I wish you well luckily I guess it's not yours but you're basically going through a no start condition like with a regular car All the coils plugs If you pull the plugs in this car early in the day you can look for water droplets on the tips of the plugs this is the car that the whole wiper tray has to come out so have new plugs at the ready and just change them I personally use the SK20 you 11s I believe it is but whatever you need for your vehicle where it sits but that's it I try I track this down on two of these generation 3s here wasn't really a lot of fun but did finally get them running and then they blew up so it's good fun you may find online or hear somebody here has the generation 3 PDF which has the whole 20 or 30 pages of the no start condition have pen and paper ready and all of that

 

Many standard shops do not work on hybrids because of their complexity and unusual symptoms.

As stated above, a no start on a Prius that cranks the engine at high rpm can be misleading and can discharge your 201v hybrid battery. Then you have another big problem for someone unfamiliar with these cars. A few dealers can charge it, some can not. It's a several hundred dollar job as it requires partial disassembly of the hybrid battery assembly.

Sometimes a no start can be as simple as a loose vacuum line which will prevent engine starts.

A bad and continuing misfire can do it as well.

The following video is a good no start diagnosis on this car. The engine in the video also has a common head gasket leak but that is not the cause of the no start. It is not the disconnected knock sensor either.

These systems often require clearing codes and two attempts after the problem is corrected. He shows how to check fuel pressure and other basic checks although some tests require modern diagnostic tools.

Basic no start from Pine Hollow
(22 minutes - don't stop at the hg diagnosis - he also does a wrap up as an extra at end)

The video starts with the wiper assembly removed for access. The following video includes removing the wipers in the first 5:32. Disregard the egr part for now.

Mervs egr and Wiper Cowl Video

Finally be careful of using aftermarket maf or other sensors as many are poor quality and may introduce one more problem to an already difficult situation.

 

Where are you going to be doing this taking apart the fuel line looking for the squirt underneath the seat underneath the little plate was a big mess under there that's where your bladder is of the very outer part of it I wouldn't do that If you want to see if you've got some decent fuel pressure start the car well your car is not starting I put your 3190 is is your car failed to start You feel it turning over and spinning but it's not starting or it would stay running so your troubleshooting a no start condition The likelihood of the fuel pump being bad is really slim but it is possible usually what I do if I just want to quickly see if I think I have pressure is try to prime the rail by turning the car on but before it starts to do a lot of cranking and wearing the battery turn it off immediately pull off the air cleaner and undo the two big bolts that hold the fuel rail down on to the injectors and to the head lift up on one corner Do you see the fuel come spraying out and fill up the wells in between the intake ports you'll smell it and you'll hear it it'll be squirting on your finger to me that indicates enough pressure is going to come out of the system to squirt out of the fuel injectors so then I push the rail back down tighten the two bolts I don't take the spacers out lift the injector rail off of the system or anything and I just lift one and usually up near number one cylinder passenger side of the car lift up on the rail and the injector between your fourth finger and what have you and just lift up a little you'll hear the gas bleeding out like an air leak in a tire once you ascertain that happens you just push the rail back down tighten the two bolts with the air cleaner back on and we'll say we have enough pressure to start the car I'm not seen a generation to personally with low enough fuel pressure not to start the car so far been through about six of them and working on about 9:00 no gas tanks no fuel pumps so far. 3190 is quite a bit of troubleshooting that involves the coils and everything The transition from MG spinning the engine round and round to everything being turned on coils fuel pump all of it that stuff is off when the engine is just going around and round and not called upon. In the Prius the reciprocating mass of the engine is turning anytime the front wheels are moving more or less The engines just turned off electrically coils are turned off not powered fuel pump isn't pumping that sort of thing but the pistons are going up and down.

 

The battery has likely been cranking it that whole time, with the engine never producing enough power to turn itself.

That will use a percent or two of battery charge each time, and when it gets low enough, you'll have a "how do I recharge a 202-volt battery?" problem standing between you and the problem you started with.

 

It and everything else done by the previous mechanics was a waste of money because the shops did not know proper diagnostic techniques. Yes a bidirectional scanner is mechanic 101 but simply disconnecting the fuel line as shown is good enough.

A clarification: Sometimes it is running but not good enough for a hybrid system that has to synchronize with the e-cvt transaxle.

 

The gen3 1.8L is X2ZR-W25N
which is the same engine shown in the the video. The knock sensor view he shows requires the air intake snorkel (front passenger side) to be removed and it is still partially hidden under the intake manifold. The fuel quick connect is on the firewall next to the heater hoses and requires the entire wiper assembly to be removed for access.



By the way, if anyone replaced the maf with aftermarket there is an almost certain chance it is no good. Cleaning an oem maf with harsh chemicals can damage it or not getting into its sensor chamber may have left existing contamination.

 

I’ve had this issue before.

Check fuel pump pressure and or replace
Check fuel injectors and or replace
Clean EGR cooler and EGR valve system
Replace spark plugs
Replace camshaft sensor
Replace crankshaft sensor

this should solve your issue.

 

If all your getting is a P3190. I'd check the ignition and fuel pump fuses and relays first. Then siphon out all the gas and replace the fuel pump assembly. Add 3 gallons of fresh 'good' gas and try again. Check and clean-out curd in the tank if you see any while the assembly is out. Since Techroline clear the issue far a while, there may be a bunch of loose sludge gumming up the works....

Cam and crank sensor issues should throw codes....

 

This is not the first time that adding cleaning products actually creates a jelly in the fuel tank that clogs the filter and reduces fuel supply.

It looks like a conspiracy between the cleaning product manufacturer and the mechanics.

I sometimes pour Acetone into the tank.
One portion is enough, one shot, like whiskey.

Yes, sometimes the car also wants to relax for the weekend.

In fact, this product binds water, which can accumulate in the tank when there is a shortage of fuel.

Acetone is a good solvent. Acetone - Wikipedia

In a bound form, water molecules, along with acetone and gasoline, fly out of the tank into the engine, turning into gas and steam.
This way, water does not clog the fuel pump filter, especially in the cold season, when it turns into needle-like growths.

 

Especially if you've been driving in Wisconsin.

 

LoL; I take it that your not a cheese head fan.

 

The blockage may be due to the fact that low-quality gasoline contains components that, when combined with other chemicals, can form a sediment that clogs the fuel filter.