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2005 Nissan Sentra wont start

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New User

Oct 3, 2013, 10:12 PM

Post #1 of 4 (661 views)
2005 Nissan Sentra wont start Sign In

Hi, I have a Nissan Sentra 2005 1.8L 4dr sedan, about a year ago june 2012, I started having trouble starting it. It would crank but wouldn't start. Took it to the dealer and they replaced the cam shaft sensor. t ran fine for a month and did it again. This time dealer said it was the timing chain (belt). $1700.00 later that was replaced too. Now just 13 months later, it is doing almost same thing again. This time, a friend replaced the plugs as they had fouled. Ran for a week, the plugs fouled again, replaced them a second time and it lasted 2 days. The 3rd time, the gas poured into the plugs right away flooding it immediatley. I am thinking it has something to do with the fuel pump - maybe the regulator. Does anybody have any ideas? It is 8 years old, I can't pump money into it like this, it only has 125K on it...thanks and drive safe

New User

Oct 3, 2013, 10:20 PM

Post #2 of 4 (652 views)
Re: 2005 Nissan Sentra wont start [In reply to] Sign In

I should add that the engine light comes on and when read, the code comes up as 0300 misfire

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nickwarner profile image

Oct 4, 2013, 4:45 AM

Post #3 of 4 (633 views)
Re: 2005 Nissan Sentra wont start [In reply to] Sign In

This uses individual coils per cylinder, but I do wonder if you have one or more weak ones. What is the fuel pressure at? Were the plugs oil fouled? You may want to do a compression test and post the numbers dry and wet for us so we know if this is caused by an internal issue or not. If you don't know the proper method for that, here it is.

First, disable the fuel supply so fuel doesn't go into the cylinders. Easiest way is to pull the fuel pump relay.

Make sure your battery is fully charged and will stay that way during this test. A battery getting weak halfway through will crank slower and make the results invalid.

Remove all 4 spark plugs. Connect a compression tester to your first cylinder to test.

Hold the throttle to the floor and crank the engine approximately 5 seconds. Note the reading on the gauge and repeat for the other 3 cylinders.

After gathering the results of the dry test, do a wet test. Pour about a teaspoon of clean engine oil down each spark plug hole and do exactly what you did for the dry test. Take note of those readings as well. All of your cylinders should read a bit higher than they did during the dry test. If you have one that was low compared to the others but suddenly picks up a much higher reading than the others did on the dry test that is indicative of a worn out cylinder.

Most auto parts stores have a compression tester that you can rent for a small deposit that you will get back when you return it, making it free use of a tool. They also should have a fuel pressure gauge, although if this takes special adapters they may not have the one you need.

Do a little testing and see post up the results. Some of the other regulars will likely be by soon and will throw their two cents in so you can be in the right direction to getting this running right again.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Oct 4, 2013, 8:08 AM

Post #4 of 4 (626 views)
Re: 2005 Nissan Sentra wont start [In reply to] Sign In

Nick has that on target. I'll only add but would be noticed in the 5 second crank anyway that you really want to look at about the third pulse of pressure and count that one. Nice if they are all close to each other but good to know if not so you don't waste $ or time looking elsewhere for a problem first,

Long retired now


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