Question about Nissan Sentra

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I have A 1986 Nissan sentra that has been giving me problems starting. I've changed the wires,plugs, roter cap and button, had A bad catilitic converter removed it and am still hardly starting and when it does start it will run for A few min spit ,sputter backfire and blow one hell of A cloud of white smoke and cut off. Someone told me it sounded like one of my fuel sensors is bad I can't recall whathe called it does this sound like A possibility if so does anyone know The name of the sensor?please help very frustrated and confused.

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2 Answers

Can not use a vehicle without a converter

You have no fuel control, without it

Where did the oxygen sensors go?

Sounds like you have zero vehicle experience
& need a repair shop

Head Gasket a possible

Compression test won't tell you the complete story

Need to do the proper tests for a head gasket, as well
as Cylinder Leak Down Test

Posted on Dec 05, 2014

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  • Nissan Master
  • 14,585 Answers

White smoke is water/coolant. Black smoke is too much fuel, blue smoke is oil burning. Since you changed plugs, this is why you get it to start. Do a compression test. My guess is a blown head gasket..

Posted on Dec 05, 2014

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Posted on Jan 02, 2017

  • 40 Answers

SOURCE: I have a 1986 Nissan Sentra Sentra that .cranks

sounds like ignition timing has jumped. if cat is plugged up it will bacmpressure and will not run.

Posted on Dec 03, 2014

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I am carsandcomps from Fixya.com. My name is Brandon. In order to replace your spark plug wires and spark plugs (best to do both) - do one at a time. Start from one side of the engine (ex: drive front/back) depending on your engine position; doesn't really matter, just start at one side.
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My 1989 nissan sentra has one spark plug that isnt getting any fire can someone explain to me what that might be


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Nissan rough idel


Sounds like the injector in #1 cylinder is not working. Unplug injector and check for OHM reading. The spec for your injector is I believe at around 10-14.5 OHMS. If out of spec, replace it. If that's OK, than check for 12V on one side of the connector going to the injector. If 12V is there, than you are getting power. The other wire goes to the ECM/computer. You will have to trace it to the computer and check for continuity from the injector connector to the ECM/ Continuity should be present. If no continuity is found, than you have a broken wire. If continuity is OK, than the ECM may be the cause. There could be other causes also, like engine mechanical issues, such as burned valve, bad piston, plugged EGR passages on your model Sentra or headgasket. Start with checking the injector and post results. I think that you will find, that its not any good.

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