Siena doubts

Hello everyone I have a Siena S the 2000 Community as I said before. My question is, it is monophen with a butterfly body injector is Marelli etc. Is it electronic injection? or is it direct gas injection? I forgive ask this because here childbirth to try to see the problem I presented before Nafta does not go. From thanks and greetings to all those of the forum.

Hello, look, reading the publications you made and I understand that when injection is either mono or multipunto, it is electronic since the injection times by the computer that receives data from several sensor located in the distribution is now controlled in the distribution now the difference is between direct or indirect. Direct refers to when you have an injector by cylinder in the case of multipoint and indirect that you are the one you have that is a single ijector that is shared in an admission as if it were a carburetor but something more delicate.
Misting me directly to your problem you would have to look several and rule out others for example spark you have because Gas is. Now your injector is good this is proven by measuring the resistance between its terminals (Eye descosco the value that should be given to know if it serves or not) obviously if it gives you zero is open the coil and you should change it. Another would be to place an LED between its two points without fear nothing happens !! and look at you when starting it is internally turned on. If it does not turn you on, it is why the computer does not send you the signal and maybe when you put the chip on the computer for CNG, if you did any cable canceled or described without wanting or wanting or wanting.
Another case that can happen to you if the injector is good and you have injection time is that the fuel pump that is inside the tank is burned or disconnected. How is it checked? Measure the pressure that accumulates in the fuel line more or less round between 2 and 4 bars depending on the brand.
As you may have damaged that when you connect the system to CNG you have not made a by pass between gas and gasoline system and when the pump is connected without working it burns (eye is a supposcition) since if it ubiquitously canecta it would have to have worked with the two fuels at the same time something half impossible so I lean to the one that the problem is between the computer (injector signal) and the injector (burnt). I hope this humble comment has served you to clarify some doubts.

Thank you Joel, not at all humble comment, your answer
was great, look I will be walking the rather and right does not take it anymore I can tear it into gasol

Hello, it is good to know what the data served you as I told you before on the subject of electronic injection you have to discard until you reach the problem that you have with a diagnostic team, I tell you why I have it and you have to discard the same.
So you tell me starts and automatically knows for this to gasoline!
I tell you the ignition has two systems. an open loop that is used to start and control the times the ignition modulus and a few seconds later would go to closed loop that would be when the computer begins to control the computers.
Now the ignition module works because it starts what is not happening is to move from an open loop to the closed what would be to verify first is which of the censors on which the computer depends is the one that does not send signal or is well calibrated.
The most committed sensors in this type of case are:
the TPS that goes on one of the sides of the injection and comes from four and three cables but that does not matter. This sensor sends to the computer the sign of the angle in which the butterfly open and therefore the computer understands whether or decreases the time of opening of the injector. What could you do is vary the angle a little to try and also see if there are no cut cables.
Another sensor is the MAP this one works by empty, that is, there is a connected hose between the sensor and the injection and when the emptiness is caused as a result of the admission, it indicates to the computer a signal that graduates between 1.5 and 5 volt that it interprets and also changes your injection time this sensor can cause the symptoms that you describe but I recommend you first visualize the hose ROZE) before sending it to check.
Another not unimportic sensor is the revolution sensor that in many cases is in front of the engine in a tool of the distribution this is very important since any thing that obstructs the signal between it is a sensor and the toothed pulley the computer will understand that the vehicle is stopped by cutting the fuel. If your car is monophen, it is very likely that it does not have it. It is nothing more than a sensor that goes in the distributor and interprets in a certain way the same as the previous one. This if you place it in contact and with the hand Moves a little the ruptor you will hear a clik product of the spark that probes when the signal cuts a window it has.
Well again I hope it serves you, the subject as time is quite complex but not difficult if you want to get a little more full leave me an email and send you a couple of archives that can clarify you even more doubts.
And if it came to have the connection circuit of the CNC system that installed you, make it to arrive so that a looks glued to see where the connection is wrong because in that indentation something lacking.
I hope you find a prompt solution to your problems greetings.
PS: All this data serves you if the installed injector is the original of the vehicle itself, the same harmony etc. since any difference in the injector causes the computer to behave strangely.