Can a fuel injector stay open?

The symptoms of a stuck-open or incompletely closing fuel injector are quite different than an injector that is completely dead or partially clogged. Also, it is common for the fuel economy of the vehicle to slowly worsen as a fuel injector starts to wear out and inject more fuel than desired.

Why does my car only start when I press the gas?

It’s the major reason for the shortage of airflow. A clogged air filter brings along many problems including ceasing the air from reaching into the combustion cylinder, hence an air filter replacement is needed. And if the filter is already clean, the next check should be for a crack or leaky induction system.

What are the three most common problems with fuel injectors?

There are three primary issues that a fuel injector will run into, which is becoming clogged, being dirty or they will leak. Other issues, such as computer errors or failing sensors, can cause the fuel injectors to act incorrectly, but these are not a result of failing injectors.

What controls the fuel injector pulse?

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

Why won’t my car start unless I pump the gas?

There are many causes of hard starting but illustrative ones are a faulty engine coolant temperature switch (sensor), malfunctioning idle air control (IAC) valve, vacuum and EGR leaks, inadequate fuel delivery or pressure (clogged fuel filter, injectors), and contaminated or old gasoline.

What are signs of bad fuel injectors?

Here are a few signs there might be something wrong with your fuel injectors.

• The Engine Misfires. Dirty fuel injectors may cause your vehicle’s engine to misfire.
• Idling Gets Rough.
• Your Gas Mileage Tanks.
• The RPM Needle Starts to Dance.
• Your Car Won’t Start.

How often should fuel injectors be cleaned?

every 60,000 to 90,000 miles
It is recommended to get fuel injector cleaning done after every 60,000 to 90,000 miles. If you’ve noticed a sharp decline in your fuel economy, a lack of power in your car, or have experienced a sluggish feeling when you accelerate, it could mean you need a fuel injection cleaning service.

What would cause no power to the fuel injectors?

No power to the fuel injectors can be caused by a few things. If the relays, fuses, and computer all check out then I would move on to looking at the engine management and fuel system. A no start condition can also be caused by a faulty fuel pump, or any of the associated components.

Do you press the gas pedal when starting a fuel injected car?

No. There is no need to press the gas pedal when starting a fuel injected car. It is actually a good idea to not press the gas pedal when starting such a car. In the “good” old days of carburetors, you would have to press the gas pedal to the floor once and let the pedal go.

What happens when you put gas in an injected engine?

Pumping the pedal sprays gas into the engine and sets the chok & idle for cold operation. In an injected engine, all of its fuel comes from the injectors. The injectors stay closed when static and only open when a signal tells them to. Thus, when the kay is “OFF”, there’s no signal, the injectors don;t open, and nothing happens.

Do fuel injectors need a choke to start?

The fuel injection system does nothing until the engine is turning (starting or running), so pressing the pedal before you start will make no difference. The fuel injectors work at any RPM, so a choke is not necessary. The computer simply feeds a little extra gas through the fuel injectors to start the engine.

What happens if you depress the gas pedal during a start?

If you depress the gas pedal fully during a start then you are doing a “clear flood”. The injectors won’t inject at all and the car will not start. We sometimes do it when the car is, for whatever reason, flooded/fouled up with excessive fuel in the intake.