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Re: 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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probly age--needs boiling out or jet ajust-------try fixin idle speed with screwdrivr---------cud be engine issue-like tuneup---inspect inside distributer cap for corrosion or worn plug wires---also egr valve mite be bad--------get vehicle scanned
It probably does need a tune up, but DO NOT take it to a dealer. They overcharge you for things that you could get at a lower price from a private auto mechanic. I don't know why it would cut off at every stop. As for the distributor cap, spark plug wires, and spark plugs... bring the car to Advance Auto Parts or Autozone, buy those things, and get them to show you how to put them on. It's really not that hard to do and you'll save a lot of money that way.
Check vacuum leaks , by spraying carburator cleaner around intake manifold gasket and vacuum hoses connections . See if engine picks up the idle speed while you doing it , and if it does , locate leak and fix it. Most common , intake manifold gasket brakes.
By changing the rotor button, this would not cause the timing to be off. As long as you don't remove the distributor a and turn the engine over. If your car is running rough it could be the wires were put on wrong, or a plug is fouled, You could have a bad plug wire. It's many options that could be the problem.
I have a 92 Nissan congrats they are awesome cars. Me and my friend changed the rotor and cap along with the spark plugs on mine. If you lost the wire pattern I would recommend going to auto store and looking it up in the nissan car manual.
Sounds like misfire. Change spark plugs, wires, cap, rotor , fuel and air filters. Check for oil in spark plug holes. if oil found change valve cover gasket spark plug orings. they can leak oil into spark plug holes and cause misfire.
Did you change the spark plug?? Your car (1993) has a distibutor assy, which means it has ignition wires for each plug. How are your wires??cap?? rotor?? Have you ever done ignition tune up?? If the answer is yes and you have already installed new injector and pressure regulator (althoug it still could be a injection issue/ECM or computer, because ECM is what drives the injectors. If the ECM or wiring to #1 injector has an issue, the injector will not fire off and put gas into the cylinder, resulting in a misfire.) Remove #1 injector connector and check to see if you have power/12V on one side of the connector. If you have 12V there, than check the other wire for continuity to the ECM. You will need wiring diagram to find the right wire color at the ECM. That other wire goes into the ECM to the driver which opens and closes the injector depending on your demands as far as gas pedal input. That driver may be bad, causing the injector not to shoot gasoline. Than I would be looking into a engine issue, such as burned valve, or head gasket problem (coolant getting into #1 cylinder, flooding your spark plug). Tough to diagnose over the computer and not looking at it my self. Let me know what you find.