Question about 1993 Nissan Sentra 4 Door

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Nissan rough idel

1993 nissan sentra se 1.6 rough idel and shutters at a stop. changed plugs and wires cap and button when the no. 1 wire is taken off doesnt change its getting fire but i just cant figure it out

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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.

Posted on Oct 30, 2008

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