What controls the injector pulse?

The (PCM) uses the trigger signal from the crankshaft position sensor; and/or camshaft position sensor to pulse the injectors.

What causes 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 controls the injector pulse width on an Obdii vehicle?

Fuel Injector timing and injector pulse width are controlled by the PCM. The primary sensor for real-time adjustment to air/fuel mixture is the upstream oxygen sensor. The sensor generates a RICH or LEAN signal that the PCM uses to constantly adjust the fuel mixture.

Can fuel injectors cause car not to start?

When the ratio of air and fuel in your engine is off, your motor may not generate the combustion it needs to operate. It’s rare, but in some cases, fuel injector issues can lead to engine failure that prevents your car from starting. It’s also possible that your car won’t start because, um, you forgot to put gas in it.

What affects injector pulse width?

When an engine needs to make more power—to accelerate onto a highway, for example—the onboard computer increases the pulse width of the fuel injectors to deliver more fuel.

Why am I not getting fuel to my injectors?

Sometimes, if your engine isn’t getting enough fuel, the culprit could be your fuel pressure regulator, a fuel leak, a clogged fuel filter, or clogged injectors. But most of the time, it’s the fuel pump. The fuel pump can usually be checked fairly easily.

What does it mean when there is no injector pulse?

In case of that, there is no injector pulse or spark, this means that is your ECU has failed in operating in this case you have to get your ECU changed or visit an expert. You May Like: Low Fuel Light Comes on When Tank Is Full Causes and How to solve it Question: What controls the fuel injector pulse?

What to do if your Dodge Neon won’t start?

If you have a Dodge Neon no crank no start condition, the first place to start diagnosis is with the battery. You must have at least 12.25 volts measured across the battery terminals to get that starter moving. And don’t think you can tell the condition of the battery terminals by looking at them—you can’t. So clean them with a wire brush.

How does the neutral safety switch work on a Dodge Neon?

But in newer vehicles, the state of the neutral safety switch is read by the PCM. If it sees that the vehicle is in PARK or NEUTRAL, it will allow starting. To do that, it usually provides ground to a starter relay in the fuse box. The starter relay switches power to the starter solenoid and THAT’s what connects battery power to the starter motor.

How can I tell if my fuel injector wire is pulsed?

If you do have battery voltage at the power wire of the injector, check the “ground” side. With the car running, it may be hard to see because multimeters are so slow, but you should get a pulsed battery voltage. It will probably just show up as a constant voltage on the multimeter however. If you don’t get it, the injector isn’t being pulsed.

How to check O2 sensor injector pulse width?

A rich condition can be temporarily created with a propane enrichment tool and a lean condition can be temporarily created by removing a vacuum line. If the engine control system is in closed loop (check loop status with the scan tool), monitor the injector pulse-width changes in response to changes to the O2 sensor readings.

Why is my fuel injector # 2 cylinder not getting fuel?

No Pulse I hooked a stethoscope to the injector #2 and it has no pulse. All the injectors are ticking perfectly fine. I switched injectors to stock and have 8 set of these injectors and no matter which injector I use, the #2 cylinder isnt getting fuel. The engine studders and has terrible rough idle at like 550rpm.

How does the engine control unit control the injector pulse?

Question: What controls the fuel injector pulse? Ans: The engine control unit is the electronic brain that used to control the fuel injector pulse by gathering data from various sensors along the fuel line