I have a 94 altima SE. I have checked all the other injectors with a meter. Every other one is working fine...13-14 volts constant, and flickering 1-2 on the other side. The number one injector has constant, but not flickering......HELP!!!!!!!!!
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Re: # 1 injector....NOT WORKING!!!
Not unusual to loose an injector , have you put an ohm meter on the injector while it is unplugged , believe you should see 11 - 13 ohms , do you have a noid light tester ? compare ohms to a good injector .
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how did you find out it is the injector causing the problem? the injectors are wired in series on these vehicles, it is possible that another faulty injector may be causing the problem. although it may be difficult to find if this happens intermittently. A scope test may be the only way to find the problem. Does the engine light come on with a misfire code on Cylinder #1? P0301 or r u just getting a random misfire code P0300 ? a bit more info on the vehicle may also be helpful........ engine size? # of cylinders 4 or 6 ?
The injectors get a ground signal from the computer. If all of the injectors have voltage but no ground from the computer, either the driver in the computer is toast or the computer is not getting a timing signal from one of the other sensors ( crank - cam ) Check the computer for trouble codes first.
maybe your fuel injector is clogged-up so try filling up 8 oz. of fuel injector cleaner 1st and let your car run for few minutes to eliminate all the carbon that builds -up inside fuel lines to the exhaust. also try testing your battery maybe dead already. use a tester then start the engine measure it. set your meter to 15 VDCor above as long as more than 12vdc for security. put he red needle to red positive of hte battery and vice versa black needle of the meter to your negative of your battery. the reading must be appx 12. 4 vdc + And then try accelerating by stepping on your gas pedal to around 2- 3000 rpm (3 x 1000) on your dash gauge. the reading must be around appx 13.8vdc or 14.2 vdc. therefore your battery is good if you see thsese results. also try distributor cap replace ,spark plugs mostly before sparkplug cables then ignition coil.
First guess is anti theft.
Leave key on for half an hour and/or lock unlock doors with remote.
Does the tack on the dash show rpm when cranking the engine?If it does you should have a injector pulse using a noid light.
If you have rpm showing and no injector pulse try borrowing a computer from a vehicle like yours.
No RPM showing when cranking?
Check/change crank and cam sensors and possibly computer.
Cam timing can cause no start but you should have an injector pulse even with a jumped tooth or two on the timing chain.
MAKE SURE WIRES ARE GOOD, to check injector Get a noid light and take that injector plug and plug into noid light it should light up everytime injector would pulse.(IT SHOULD BE A STEADY PULSE) contact if you need more help