If you stick 12v of power to it the injector should open up to spray gas. (I wouldn't just stick 12V on it, it could damage the coil from too much current. My Toyota shop manual shows a special service tool that is a cable and resistor, to limit current flow.)
or you could use a Digital Voltage OHM Meter and measure the resistance across the terminals of the injector. make sure vehicle is off and key out of the ignition. if the resistance is not within specification(can be found in vehicle specific manual or through dealership) replace that injector. First check that the electrical system is operating correctly by listening for a clicking sound from each injector, then if you cannot tell which one did not click you then proceed by disconnecting each injector wire in turn and connecting it to a noid light ( a 12 volt light bulb with 2 wires ) , when you turn the engine over the bulb should flash mimicking the injector pulse. If they are all good ( actually I think you would only need to check a couple ) move on to the ohm meter test, check ohms against a known good injector if you do not have the specs or look for variation across all the injectors. Also check the injector terminals to ground, if continuity is detected replace. If all is still good, disconnect the fuel rail and with some mechanics wire attach the injectors and crank the engine, a good injector will have a cone shaped spray.
the harness could be bad on that injector chech to see if its firing and if it is then the injector is bad
There is a noid light that will check injector pulses from the distributor. It plugs into the injector plug. Most common failure for inop injector is in the distributor module. Also check fuel pressure to see if the fuel pump is operating correctly. It should come on for 2-3 seconds when ignition key is turned to run. Chevy guy denver
On top of engine you will see a metal line that feeds fuel injectors that is your fuel rail it will go around to each injector on that line you will see a fitting where you attach a pressure guage
turn your car on, then unplug the fuel injector circuit one at a time...check to see if the motor shakes after u unplug it... if it does, plug it back in and try another one...if it doesn't shake like the others that's the bad one...
Switch the electrical connections between the two injectors and see if the same one is still bad or if the problem switched to the other one. If the same one is bad, you have a bad injector.
A cylinder misfire can be cause by a bad spark plug or a bad fuel injector. Replace the spark plug to see if the problem is corrected.
There are several ways. Most people use what is called a noid light. To use a noid light you unplug a fuel injector and plug a noid light in to the harness. You turn the engine over. If the noid light flashes then you have injector pulse. Another way to check is to use a low wattage test light. Unplug a fuel injector, and plug one end of the test light to each wire from the harness. Crank the engine over and see if the light flashes.
A bad cylinder had will cause your 1999 Nissan to not start. Check the oil to see if there is fuel in the oil.
you can see the valve on the fuel injector. it is on the passenger side of the car and to the front of the injector.
Remove the injector and you will see the o-ring.
you could add gas treatment liquid to your gas tank or you could buy the fuel injector cleaner tool and run the system with fuel injector cleaner which is alot faster. other then tht you could take each fuel injector out and spray carb clener through the fuel injector until you see nice spread out spray coming out.
Hey James==The wires to the injector are one hot all of the time and one pulsates as the ecm grounds it as the engine is turned over. TAke a test light and hook one end to ground and probe both wires on the injectors. One wire should have 12 volts. If not, check all of the fuses. If no fuses blown check the wiring. If you do have 12 volts, put the light from 0ne injector wire to the other and have someone turn the engine over. the light should flash. If it doesn't, check the wiring to the ecm. Goodluck, Joe
Loosen off the injector pipes at the injector turn vehicle over when you see fuel coming out of the joints retighten the pipes this will allow the air to escape.
You never hear the fuel injectors. You may hear the fuel pump if you listen carefully. Start by replacing the fuel filter. If that does not help, have a fuel pressure test run to see if the pump is weak.
While the motor is running, loosen nut until you see diesel fuel leaking. If there is no significant change in the way the motor runs, that is probably the bad one.
Hook a fuel pressure gauge to the fuel pressure rial and just turn the key on and see if you get any pressure reading. If not you may have a bad relay, or a blocked fuel filter or the pump is bad itself.
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.
The best thing to do is replace the fuel filter anyway. You will need to do it even if the fuel pump is bad, so you have nothing to lose. You can listen to hear iif the fuel pump is kicking on at all. If it is, just do the fuel filter. Its much cheaper and easier than the fuel pump. Then you can test the fuel pressure to see if the pump is bad after you replace the filter.
If this is a petrol vehicle with K-Jetronic injection (you will see four separate braided fuel hoses, one from the fuel distributor to each injector), there is no timing involved in the injection. Each injector sprays a constant mist of fuel.
first check to see if fuel filter is clogged.if you have an electric fuel pump, check the fuel pump fuse. next check the fuel lift pump. then check the injector pump
Depends on the car... If you can see the injectors, you'll need to disconnect the wiring harnesses from the injectors... (there is also usually a boot over the injector). You then need to disconnect the injector from the fuel rail. (careful not to strip the little fitting). You can then use a wrench or injector socket to remove the injector. Make sure you replace the gaskets and seals when installing the new injectors. (might need teflon tape around the pipe fitting where the injector feeds from the fuel rail).
There is no injector relay. The fuel injectors have +12 volts on the pink wire all the time. The pink injector wire is fused by the 15 amp fuse in the divers side fuse panel. The 15 amp fuse gets its power from the ign switch. Check power at the injector with ignition on should be 12 volts. The injectors get their ground from the ECM located under glove box. If you have no power at the injectors with the ign switch on, use a temporary jumper from the + on the battery to the pink wire. (If it runs you have a bad ignition switch.) If you have power at the pink wire use a NOD test light at the injector to see if the ECM is working. Good luck.
Buy some STP fuel injector clean and mix it with about 10 gallons of gas and just drive around town , if it doesnt seem to be working at all they may need to be replaced
if there is fuel to the throttle body injector then test the injector itself. is there a pulse from the computer? use a noid light to see pulse. if so does the injector has high resistance? (resistance can be looked up on-line or at your local auto parts store) resistance is the amount of amperage electricity needs to go through something. that's why corrosion on the battery can cause it to fail or the alternator to fail. if all these tests fail, inspect for blockage between the injector and inlet to the TBI unit.
Typically that's when an injector "leaks" fuel after the engine is turned off, the fuel pools in the cylinder then the fuel slowly leaks past the pistons and builds up in the crankcase. It would be a good idea to find out which injector is causing the problem, or at the very least, run some injector cleaner through to see if you can stop the condition.