Fuel consumption, three nozzles are not working?

Hi,

First, I'm not showing an M30. Instead, we have an M35 which also has a 3.5L engine.

I suspect you are referring to the fuel injectors. Is that correct? If so, we need to check the three injectors not working to see if they are getting power.

If the wiring is the same (see pic below M35), locate the white wire with a blue tracer. With the key in the run position, that wire should have power. Confirm that for me.

If that wire does have power, we need to see if the PCM is providing a ground path to actuate the injector.

To do this, take the alligator clip side of a test lamp and connect it to the battery-positive cable. Disconnect one of the affected injector connectors. Take a look at the schematic. Note that each one has a white/blue wire for power and a black wire for ground. There is a third wire that is a different color for each injector.

Using injector 1 in the schematic as an example, touch the test lamp to the yellow wire with a red tracer and have a helper crank the engine. The test lamp should strobe on and off. If it doesn't or stays on constantly, either we have a faulty ECM (engine control module) or a wiring issue.

Try this and let me know the results.

Take care,

Joe

Hi,

You are very welcome. Keep in mind the power supply to each injector is spliced into one supply wire, so there could be an issue at that point as well.

Take care and let me know if I can help.

Joe