Feb 12, 2013 - What Tools Do I Need to Test the COP Coils. ... coils (most commonly known as the COP ignition coils), on your 1.8L Nissan Sentra is pretty easy. ... When one COP ignition coil fails... that cylinder goes 'dead' due to a lack of Spark and is said to be misfiring. .... 2000, 2001, 2002, 2003, 2004, 2005, 2006 ...
Jan 17, 2013 - Checking for Spark With a Spark Tester. ... Your 1.8L Nissan will either have a distributor-type ignition system or the more modern COP ... A BAD fuel pumpwill cause your 1.8L Nissan Sentra to Crank but Not Start... since the ... Still, the other method that I've used to test for a lack of fuel... is spraying starting ...
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I doubt anything is getting wet, but you could be right on a bad connection. You could have enough humidity in the air after a rain to cause a weak connection to fail completely. It could also be a faulty relay. Someone would need to figure out if you are lacking spark to the plugs or fuel pressure when it fails to start, then track down why.
anti theft malfunction. seriously put your ear near the filler neck uncapped and have someone turn the key. is there s whining. then that rules out a bad fuel pump> try carefully priming the injectors with fuel and then crank. standby with a garden hose in the even it backfires and pukes out the fuel. remove a plug wire and put any plug in the boot rest it against the valve cover have someone cranlk and looks for spark. 2 main causes for no start lack of fuel, lack of spark
Its not the oil, increasing temperature will thin out the oil. If it cranks easily but won't start it could be the spark plugs or the spark plug wires. When they heat up, especially if they are old, they won't perform well. Pull off one of the wires and hold it close to the plug, try to crank the engine and look for a spark. If it sparks them try removing a plug and check to see if it looks wet. If its bone dry it might not be getting fuel.
Sounds more like an intermittent problem has become permanent, nothing ever fixes itself. You are going to have to start by figuring out whether it is lack of fuel or spark. Pull a plug out and see if it is dry or wet with gas. If it is wet then you have fuel coming into the chamber. Have someone turn the ignition key while a wire connected spark plug is held down touching the engine block. DANGER WILL ROBINSON CHANCE OF SHOCK. Do not use yourself as an electrical path from the plug to the block. If you see a spark jumping across the little gap on the tip of the plug, then you have spark. If no fuel most likely you are looking at a fuel pump or pressure regulator, if no spark an ignition module or computer. This can become very expensive very quickly. I would spend a hundred at a dealer getting a diagnosis before I spent dollar one on parts. If you scroll through these queries you will find many, many situations where folks have spent hundreds replacing good parts with new parts and have yet to stumble upon the bad part.