Question about Nissan NX

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Hi Car wont start .Spark plugs are new checked each one and have good spark.New fuel filter .Fuel pump is fine getting clean fuel to the injectors.Got a new air filter which I disconnected and sprayed ether into air intake ,turned starter over still didnt fire.Then I took plugs out and sprayed a bit into cylinder still to no avail.I do not have a pressure guage to check compression but do you think this could be timing belt maybe? I have spark ,clean air and fuel and cannot think of anything else. Cheers.

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Sounds like it could be. (without checking to see if you have a "pulse" at the injectors) You can usully hear a difference in the way it turns over with a cam belt issue.

Posted on Mar 26, 2011

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This will be due to a bad fuel pump, a broken timing belt, an inoperative cam sensor or crank sensor. Also this problems are related to faulty spark plug. Check the spark at spark plugs when you start the car. Do you notice any spark. Actually you should see. If in case there is no spark then it's a spark plug problem. Also the coil pack gives power to spark plug. So check the voltage at coil pack. It will show 12 volt.If there is no voltage noticed at coil pack then its faulty coil pack that has to be replaced.Also check and confirm that there is fuel in the car. If its very low fuel then in some cases this causes the problem. Also check and confirm that fuel pump is functioning properly and the fuel filter is not clogged. One of the easiest ways to check for a fuel pump related problem is to spray a little starting fluid into the air intake while trying to start the car. If the car starts momentarily, then there's a good chance the fuel pump is not working or the car is out of gas. You can also listen for the fuel pump's humming sound when the key is first turned on. Also if a inoperative fuel pump is suspected, a good technician will always check to verify there is power and ground being supplied to the pump, to eliminate the possibility of a bad relay or electrical issue. Fuel pressure can be checked with a pressure gauge and if there is pressure, pulse can be checked at the fuel injectors in several ways including the most common, with the use of noid lights. If the injectors don't have pulse the engine won't start. ---------- This troubleshooting tips will help you to solve the problem.Thanks.Helpmech.

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1 Answer

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It need to have fuel and sparks to start.
Have you check to see if there is spark after all new parts?
If there is spark, then check if it has fuel.

To check spark, hold 1 spark plug touching engine chasis while cranking, if there is no spark then problem with the coils or ignition module.
To check fuel, after cranking several times but no firing, take out a spark plug to see if it wet.
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