misfire cylinder 2 p0301 no pulse injector

Replace injector next?

 

Don't replace the number two injector yet.
Run the following tests on that particular injector number:
1. Check for POWER, GROUND, and SIGNAL on the injector wiring harness. It is only when these test proved OK, that you replace the injector.

Also check if the injector connector is properly keyed to the injector.

Note: Sometimes when you have carbon deposits on injectors, it could cause such misfire.


Dxta

 

Injector plug can be tested for power. Test it for ground and power.
Another simple test is to start the car, then unplug the connectors on the injectors o e after the kther, and observed how it they vibrate. As you disconnect them one by one, you'd notice the engine tends to want to go off. If number two doesn't exhibit that, it means that injector is bad, or it isn't getting power/ground coming to it from the ECU of the car.

 

Yes you can with a DVM.

 

You can also unplug all the injector connectors one after the other, as you start the car. Carefully observed the engine behavior (I mean, how it vibrates), as you unplug them. If the injector is the culprit, it won't vibrate as though the engine would go off. But if the injectors are OK, you'd feel that kinda vibration as a misfire(injectors are OK then).

If you try that it doesn't work, then try testing for POWER(connect black lead of meter to body ground, and the red lead of terminal to I think red/or black red strip wire on the connector, with the ignition put on the ON position. You do the reverse for testing the ground). If you don't get 12volts, there's a problem with wiring harness linking the injector to the ECU (open circuit, etc).

 

With a simple mechanic's stethoscope (and maybe even with a long screwdriver pressed to your ear) it's possible to listen to the clicky sounds of th individual injectors.

Extra-dirty ones can make thump sounds rather than clicks.

-Chap

 

Injectors have TWO wires, typically 12v and pulsed ground (but some OEMs pulse the power with constant ground).

Carbon will not cause no pulsing, but can affect fuel flow thru the nozzle.... geeze.

Get a "NOID" light from your local auto parts store, they are CHEAP. If the NOID lights when you crank/run the engine, then the harness, terminals and ECM are working in good order and most likely the injector coil itself is bad.

 

Probably saying the same thing, in a ....way

 

Did you check to see if ground is in fact grounded? Might be pulsed on the 12v side.

 

If you've tried that, and there isn't a good ground, in my view, you might Br having an issue, with the HV battery ecu ground driver. If there's a short in the ecu internals, the bet you could do is to get one from a donor car, and try it out.

Are the other injector harness wiring connectors to the other injectors having a good ground also? If they do, then you've got to repair the harness, or replace it.

Dxta

 

Then either the female connector for injector #2 is not making a good connection, or the ECU is bad. If it's the ECU, it *may* be possible to take the cover off and find a bad solder joint. I have done this many times, but it get more difficult each year as the components shrink.

 

I mean the

The pulse driver is embedded inside the ECU I'm referring to.
Not the ecu at the battery pack. I meant the one located at the engine side. But definitely I'm not talking about the one at the hybrid battery pack.

PS: ha e you checked for continuing on the wiring harness from that injector #2 to the ECU I'm referring to?
Ensure there isn't an open circuit on that circuitry, before finally replacing the ECU.

Do update us pls.

Dxta