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Old 10-26-2010, 02:21 PM
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Default engine turns over but won't start

I would really appreciate any advice on what might be wrong with my 2007 Sentra. Have taken it to the dealer 3 times and they can't determine what the problem is. The engine turns over and sounds normal, just won't start. Computer gives a code that says "tampering". They rekeyed the chip in my keys and then they replaced a sensor around the ignition. Sometimes it will go a week and not have the problem, but when it does, it's a problem. So far, I've been able to eventually get it to start by slowly pressing the accelerator and releasing it 3 times. But, yesterday it took 9 attempts. The dealer doesn't know what else to try. Any suggestions would be appreciated.
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Old 10-26-2010, 03:11 PM
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Have you or the dealer checked if there is fuel pressure and spark while the problem is occurring?
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Old 10-26-2010, 03:35 PM
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I don't know if the dealer checked these. Is there a way I can check this myself?
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Old 10-27-2010, 02:36 AM
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Does the vehicle have any aftermarket accessories?
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Old 10-27-2010, 11:33 AM
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No, as far as I know, it doesn't.
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Old 12-12-2010, 01:02 PM
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Was there any resolution to this? My girflfriend's 07 sentra does the same thing. 47k miles and bone stock. It hasn't left her stranded but id like to get it fixed before it does. Thanks. -Darren
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Old 04-08-2011, 08:06 PM
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I have a exactly same problem and service department at Nissan told me the same thing as you mentioned. They rekeyed the chip in my keys and then they replaced a sensor around the ignition. I also received a new key. I have found out when this problem occurs all I need to do is put the car in neutral and move it about a feet or two and I can immediatly start the car. I have provided this information to the Dealer in Houston(Baker Jackson) and Iam scheduled to take it in to replace couple of sensors next week. Since this is a random issue and this may not happen for a month I will post the result later time.
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Old 07-10-2011, 06:02 AM
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I have a 2004 Nissan Altima. Everything was fine until 2 days ago, woke up and car was slow to turn over...it cranked and sounded find, but very slow. After sitting for a few hours it would not start. Replace the battery after jumping it twice and all was good started right up. Now, the day after replacing the battery once again it will not start. You can hear the engine cranking and after continually doing this for a few seconds it starts, I let it run for a few minutes and it starts right up. But if I wait for a couple of hours the same thing happens but not sure what the problem may be. I did notice that when changing the battery one of the cables was hard to tighten because ring that goes around battery post is cracked. Could this be the problem?
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Old 07-10-2011, 02:26 PM
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Yeah, you need to change your battery cable terminal. Your not getting good contact.

It happen to me when I replaced my battery. The new battery post was a tad smaller and I can't tightened the terminal anymore. I twist it around until the cable butts the front frame and it stays really tight. No more problem.
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Old 08-13-2011, 02:12 PM
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The owners manual says that other keys or fobs on your key ring can interfere with your immoblizer circuit. It will prevent the fuel pump from running. The red light that flashes on your dash all the time is the immoblizer indicator. If it comes on and stays on while you try to start the car, it has not properly read the radio frequency from your key and will not turn on the fuel pump. Try using your other key and see if it works better. When I have a problem, I remove my key from the the key ring, wait ten seconds and try again, with only the key (no key chain).

good luck
Jimbo
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