Question about 2012 Mazda 6 i Sport Sedan 2.5L 4-cyl. 6-speed Manual

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Fuel injectors not spraying - 2012 Mazda 6 i Sport Sedan 2.5L 4-cyl. 6-speed Manual

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Given late model, rarely would it be fuel pump, but fuel relays are the most common issues of no fuel to injectors. If rail has fuel pressure, then it has to be electrical, and only fuel relay controls and sends power to injectors.
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Posted on May 23, 2015

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Bad fuel pump or relay to fuel pump or blown fuse to Main Relay or bad relay, could cause no spray from injectors.
Hope this helps.

Posted on Apr 02, 2015

Testimonial: "Fuel pump works got fuel coming out at fuel rail.fuel pump fuse is good.im going change main relay now"

  • danoyachtcap
    danoyachtcap Apr 02, 2015

    Only other thing I can think of is an emissions sensor that causes computer to not spray fuel. Like no spark might do that.

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to be honest, with an 89, all you can do is replace the injector. how an injector works is there is a small amount of current that is run to a coil around a rod (if you are unaware, this produces magnetic fields). the magnetic field produced pulls up what is usually a small ball, allowing fuel to go through the tip of the injector nozzle. all you can do to fix this is to buy different injectors.

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An injector can pulse without spraying fuel. They can get plugged or get build up on the nozzle and squirt fuel instead of spraying or not spray at all.. Your fuel rail is common rail, so your fuel line should go through a pressure regulator and then to a rail that dispenses the fuel equally. I have heard of cases where kia replaced the fuel rail to solve this problem. All the injectors will get the same amount of fuel pressure with this system, so if you have injector pulse and no missfires on #2 and #4, i would suspect clogged injectors. You can have an injector flush performed, which is probably not a bad ideal any way, to see if you can clean them up, or just replace the bad injectors. You can also inspect them visually to see if there is any debris on the nozzles. I wouldn't recomend that to an inexperienced person. Fuel can be very dangerous. I have head of techs removing the injector from the rail and running the car and watching the injector spray the fuel. Not recommended at all. All it takes is one spark or hot surface. Do a fuel injection clean, or buy some BG brand 44k fuel treatment and put in the tank first, the fill it up with gas. You can remove the injector and soak it in injector cleaner also to help free it up. If any of these don't help, time to take it in...they are also experiencing ECU problems..

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