Ford F-150
Ford F-250
Late Model 1979-New Ford Mustangs

How do you check to see if fuel injectors are plugged?

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2015-07-15 21:29:29
2015-07-15 21:29:29

Injectors typically don't plug too often. The fuel filter needs to be changed routinely. Injectors require a certain amount of pressure to work right. The fuel filter gets dirty and doesn't allow enough pressure into the injectors. Try changing that 1st. Also, the throttle body needs periodic cleaning. I always run injector cleaner once every 3-4 months. If all this fails, you have to pull the injector and be able to apply cleaner/solvent thru it at the correct pressure. I had a bronco 5.8L V8 had 300K miles and never had an injector plug. You can have them professionally cleaned. Make sure it is done by putting the solvent under pressure, not just putting it in the tank.

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get a voltage tester and check to see if your injectors have a pulse if not check to see if you have any fuel pressure if you have no fuel pressure then your fuel pump is out

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Check the injectors. They may have "varnished" up a bit with dried fuel. The fuel filter may have plugged up. Start at the back, pull the line to the fuel filter and make certain that you can get fuel pressure at least that far. Next, connect the fuel filter and see if it's plugged, even partially. If it is, replace it. Next, with the fuel filter back in place, check for fuel pressure at the injectors. Most vehicles have a test port to let you test the fuel pressure. Remember that really old fuel will often not start a vehicle. You may need to drain everyithing and add new fuel. Once you're certain that all of the fuel problems have been addressed, (new filter, new fuel and maybe even a can of injector cleaner in the tank) try a little starting fluid to see if you can get it to run, even briefly. As an absolutely LAST resort, you may need to remove the injector(S?) and get them cleaned or replace them. I don't know if your Corvette is multi-port injected or throttle body injected, although I suspect multi-port, so I'd be surprised if ALL injectors plugged up. Start with the simple, less expensive stuff, and work your way through.

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Are you saying you are loosing fuel? If so, then check you engine oil and see if it is overfull. If so, then you have one or more injectors that are leaking. You may also possible have a fuel pressure regulator that has gone bad. And lastly, check to see if you have a fuel leak that is allowing the fuel to leak on to the hot engine and evaporate.

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check fuel cut off switch make sure its not triggered. check fuel pressure if none see if u hear fuel pump going on if not check for blowen fuse,check for power at fuel pump if u have power at fuel pump replace fuel pump. also make sure ur fuel filter is not plugged it sounds like a fuel pump to me. you will have to drop the fuel tank to replace pump.

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Use a code scanner to check the engine diagnostic codes. If you see any problems fix that first. If there are no issues, check fuel pressure at the fuel rail test port. If the fuel pressure is low either at an idle or when driving under full power, check and/or replace the fuel filter.

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Check the Mercury Villager manual to see if there is a special procedure for cleaning the fuel injector. If not, you can purchase cleaner. You can also have the injectors cleaned by a mechanic or an oil change company.

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In order to answer this you need to be more specific as to what fuel problem you are having. Is it a fuel pressure problem? or a fuel injector problem. I would suggest you go get the fuel pressure checked to begin with. That can usually tell you if the fuel problem is from the fuel tank to the fuel rail or if the problem may lie in the fuel injectors. A weak fuel pump or a clogged fuel filter may be the culprit. If your pump is good and the filter is clean, then one or more injectors may be clogged not allowing the fuel to get to a cylinder. The fuel pumps job is to deliver the fuel to the injectors, the fuel injectors are designed to deliver the fuel to the engine beit through a throttle body or a bank of injectors or single injectors made for each cylinder. Start with a fuel pressure test and see where that leads and then come back and repost.


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