What causes a weak injector pulse?

You could have bad injectors, a bad resistor box (unlikely as I haven’t ever seen a bad one unless someone else has), or a wiring issue. Like stated before the ECU controls the grounds. Meaning the ground circuit for the injectors goes directly to the ecu.

What should injector pulse be?

Injector pulse width is the amount of time, measured in milliseconds (ms), that a fuel injector stays open (delivers fuel) during a cylinder intake cycle. The typical injector pulse width for an idling engine at normal operating temperature is between 2.5 and 3.5 ms.

How can I tell which injector is bad?

The most common sign of a bad fuel injector is the check engine warning light, which appears on the dashboard. As soon as an injector isn’t doing what it should, this light will come on. (In other words, if it’s adding too much or too little.)

Why are my injectors not getting power?

No power to the fuel injectors can be caused by a few things. A no start condition can also be caused by a faulty fuel pump, or any of the associated components. I would verify that the pump is operating, and that it is providing the required pressure for correct engine operation.

Does ignition module control fuel injectors?

Does ignition module control fuel injectors? The ICM doesn’t control the injectors, but the ECM will not pulse them without a signal from the ICM. The ICM monitors the reluctor wheel on the distributor shaft and triggers the ignition coil at the proper moment to send spark out from the coil to the correct cylinder.

How do I know if my injector has power?

Fuel Injector Resistance Testing

Turn the multimeter to “Ohms.”
Place the multimeter leads into the fuel injector plug terminal.
Read the Ohms, or resistance, produced by the fuel injector.
Test all the fuel injector Ohm readings.
Replace the injector if the Ohm value is significantly different than other injectors.

Why does my Honda Civic have 4 cylinders?

When one (or more) of those 4 cylinders misfire, it’s because one of those three things is missing from the cylinder (experiencing the misfire). If your Civic is experiencing a misfire, it’s probably doing one or more of the following: The check engine light (CEL) is on.

Is there a problem with the Honda Civic p0302?

P0302 is certainly a cause for concern, and can be a threat to the drivability the Honda Civic. The nice thing about it is that the P0302 has tracked the problem to a particular cylinder, which makes diagnosing the problems simpler than P0300, which means that the cylinders are randomly misfiring.

Why does my Honda Civic have a misfire code?

Driving with a misfire can damage that catalytic converter. Raw fuel is also passing through the cylinder into the exhaust. Mileage may suffer as well when your Civic has P0302. P0302 is a cylinder specific misfire code, which means that cylinder 2 is misfiring and causing the code.

Why is the number 2 injector not pulsed?

If you don’t get it, the injector isn’t being pulsed. Now, since it’s only the number 2 injector, it shouldn’t be the injector driver in the ecu. Look at wiring diagrams again and trace the injectors back to the ecu, checking for voltage just like you did before. Most likely you have an open somewhere. Click to expand…

What is the misfire code on Honda Civic p0304?

Mileage may suffer as well when your Civic has P0304 as well. P0304 is a cylinder specific misfire code, which means that Cylinder 4 is misfiring and causing the code.

What causes a Honda Civic engine to misfire?

It’s when one of these three things is missing from the mix that the engine in your Honda Civic starts to misfire. Let’s look into more specifics: Ignition System: The majority of misfire codes have their root cause in a failed ignition system component that isn’t creating or delivering spark to the affected cylinder.