Question about 2001 Nissan Sentra

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Sentra misfire problems

I have a 2001 nissan sentra gxe. 1.8L I4. i am having misfire problems and i have changed my sparkplugs, i do not seem to have a vaccum leak. i am burning a considerable amount of gas and have extreme loss in power. any help would be greatly appreciated.

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I would pull the sparkplugs and examine.Are they Black? ,Wet?, Hot?, Cold? Also whenever you change the plugs change the wires (cap and rotor if app.).Cracked wires are hard to see but can cause spark to find ground before it gets to sparkplug.8 year old car how many full tune ups?.Good Luck.

Posted on Sep 08, 2009

Testimonial: "thanks. my car does not have sparkplug wires. i did check my coils and it appears that one of my direct coils is bad and not working. "

  • middleburybi Aug 25, 2011

    new mass air sen. fixed my misfire and loss of power 2001 sentra.

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I had the same problem with my 2001 Sentra GXE at 130,000 miles and the cause was the same mentioned in the testimonial: a bad coil pack. There are four coil packs: one for each spark plug. They are accessible from the top of the engine and each is held in place by only one screw and one electrical connector.Diagnosis is simple. With the engine idling, remove the electrical connector from each of the coil packs one at a time. If the corresponding cylinder is the one misfiring, removing the electrical connector will have no effect. If the corresponding cylinder is not the problem, the engine will sound like it is about to stall (and it may if you don't plug the connector back in).Once you isolate the problem to one cylinder, swap the coil pack on the bad cylinder with one from another cylinder. Be sure that when you move the coil pack from one cylinder to another, you swap electrical connections as well. Next repeat the test from before, removing electrical connectors one at a time from each of the coil packs with the engine idling. If the problem cylinder has moved with the coil pack, congratulations, you just found the problem. Get a new coil pack (I paid ~$80) and install. If the problem remains with the cylinder and does not move with the coil pack, you might have a problem with the spark plug or the electrical connection. Try checking the voltage on the electrical connector and/or changing out plugs. If that doesn't do it, you might have a fuel injector problem. Good luck!

Posted on Apr 14, 2012

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I have the same problem my coil packs are good spark plugs good could it be just the plug that goes into the coil pack thats bad on my car its getting voltage thre wires but not from front of conetctor to coil pack

Posted on Dec 13, 2012

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