A fuel injector atomizes the pressurized fuel. It also injects it into the combustion chamber. In comparison, fuel pumps pressurize fuel and send it through the fuel line and fuel injectors. Fuel injectors decrease the pressure within fuel systems, and fuel pumps increase the pressure within the fuel system.
If an injector becomes clogged with fuel varnish deposits and fails to deliver its normal dose of fuel when it's energized, or fuel pressure to the injector drops below specifications because of a weak fuel pump, plugged fuel filter or leaky fuel pressure regulator, the PCM may not be able to increase injector duration ...
A damaged fuel injector will not only causes issues with driving, but the effects will persist even as the engine idles. Instead of a smooth engine idle, it will be rough and irregular when the fuel supply is abrupt. Reduced fuel efficiency is another signal of a damaged fuel injector.
A fuel injector that is starting to clog has a certain feel. You will have a slightly rough idle but the vehicle will perform normally under acceleration, up until when the injector becomes completely clogged and creates a cylinder misfire all of the time.
Age and condition – if the injectors are old or worn out, a clean may not be enough to restore performance and could do more damage. Severe clogging may mean they need to be replaced anyway. Costs – cleaning fuel injectors is cheaper than replacing them.
Hook the pressure gauge to the fuel pump test fitting.
Locate your fuel pump test point, which is usually near the fuel injectors, and locate the point at which the pump hooks up with the filter injector rail. There should be a separation joint or a test port, where the pressure gauge attaches.
A: Although a bad pump itself doesn't throw a code, the incorrect amount of fuel sent through a car's fuel system could trigger sensors that anticipate certain levels and ratios of air and fuel mixtures. So technically, yes, it's possible to see a code as a result of a bad fuel pump.
It takes gas from the gas tank and sends it to the engine so your car, truck, or SUV can start and run. Your vehicle's fuel pump should last at least 100,000 miles or more.
A weak fuel pump may still pump fuel, but the vehicle may experience difficulty starting from the lack of pressure. A weakened fuel pump can cause the vehicle to take more cranks to start than normal, and in more serious cases may even cause the vehicle to require multiple turns of the key before it will start.
We do not recommend you driving with a failed fuel injector. The issues can cause the car to stall every few moments or accelerate unpredictably, which is unsafe to you and other drivers on the road.
If you happen to hear a rough idling voice, then it is a sign that the fuel injector is bad and it is not delivering the necessary fuel to the engine. Also, a fuel injector normally makes a ticking sound when it works, if you fail to hear that sound, you might have a bad fuel injector.
As mentioned earlier, when the injectors become clogged, they lose their ability to supply the necessary amount of fuel or create a proper spray pattern, but worse yet, the corrosive nature of carbon deposits literally destroys fuel injectors over time.
As mentioned, the average cost of fuel injector replacement can vary depending on several factors, such as the make and model of your vehicle, the severity of the issue, and your location. However, on average, you can expect to spend anywhere from $500 to $2,500 for this fuel injector replacement.
If the fuel pump stops working for any reason, the flow of fuel to the engine stops and the engine dies. Fuel pump failures tend to be sudden and unpredictable, with few symptoms to warn the motorist that trouble is brewing. And the higher the mileage on the vehicle, the greater the risk of a fuel pump failure.
Using subpar or dirty fuel is one of the common reasons that can cause your fuel injector pumps to stop working efficiently or entirely. Overtime residue like gunk and grease can build up inside the fuel system and clog up the entire fuel injector pump.
Replacement Schedule for Fuel Injectors
The Injectors ought to be replaced every 50-100,000 miles, in normal conditions. That is according to some published studies, but the true replacement interval may be very different, based on several factors.
Although fuel injectors are individual, they are designed to work as part of a team with the other injectors. So, if you're wondering if you can replace just one injector or all, the answer is almost always to replace them all. Typically, the labor to replace one or all of them is the same.
Fuel injector problems can eventually lead to a breakdown, or in extreme cases, an accident if your engine fails while traveling at speed on the highway. Be sure to treat the problem before that happens.