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crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
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X trail won't start - Update: Piston rings and timing chain issues


Hi all,

My 2006 X trail T30 won't start at the moment. I can hear the starter motor (I think) turning over but the engine never starts.

8 days prior I had to jumpstart the car but otherwise there were no irregularities, over half a tank of fuel, no warning lights and it had been well maintained and running well.

We checked the fuel pump, battery and spark initially and everything appeared fine. A mechanic friend of mine then the computer diagnostics in my garage. The computer picked up an error to do with the crank angle sensor, which was replaced less than 6 months ago.

The next day we replaced both crank angle sensor's and the car again wouldn't start.

We're about to have the car towed so that the mechanics can work on it in a more suitable environment and get to the bottom of it.

At the moment, other theories involve issues with the electric cables or the timing chain.

I've had a search but haven't turned up anything that matches my case.

Has anyone experienced something similar? Can anyone suggest what we should look for?

It's very odd as the car has been well maintained and any issues have been quickly resolved. It was running well before hand, and there was nothing out of the ordinary after I jump started it a couple of weeks ago.

Any help is appreciated.

Last edited by crventura, 22/Mar/2015, 10:54 am


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2007 T30 ST-S Extreme
15/Feb/2015, 8:52 pm Link to this post Send Email PM   Send Private Message Blog
 
crventura Profile
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X-TRAIL NEWBIE
 


Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
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Re:


Just an update for those playing along at home.

I had the RACV come out and take a look as a second opinion. After checking the obvious things he ran the computer diagnostic which again returned the error code P0340 Camshaft position sensor. He then cleared the error list and attempted to start the car which again failed. He re-run the diagnostic and this time it did not return the error code P0340.

He also noted that the ECU was not registering any throttle when the accelerator was pressed and that there was no spark or switching of the coil packs.

We concluded that something is causing the ECU to prevent the engine from igniting and had the car towed to the mechanics for a more thorough investigation.

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2007 T30 ST-S Extreme
17/Feb/2015, 11:33 am Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29088
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Re:


Pretty common fault with the T30 are these failed sensors and most of the T30 models require them to be replaced.

In your case replacing the Crank and CAM sensors should have been done at the same time and the 3rd fault is related to a faulty TPS sensor (Throttle Position Sensor).

An error code sometimes won't register in the ECU if the sensor is playing up, but it will still produce all symptoms of a fault.

You can do a search on the TPS and all other sensors to ensure the mechanic won't give you a bill for complete engine replacement emoticon

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17/Feb/2015, 5:59 pm Link to this post Send Private Message MSN Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
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Re:


Thanks for the reply Jalalski, Can you point me in the direction of any further discussion of faulty throttle position sensors causing a similar problem to mine?

I've had a quick search but everything I've found concerning throttle position sensors involves things like erratic idle and odd RPM ranges.

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2007 T30 ST-S Extreme
19/Feb/2015, 11:10 pm Link to this post Send Email PM   Send Private Message Blog
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29088
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Re:


All 3 sensors give the same symptoms to what you are having and assuming you have checked that your battery is fine, it is also very important to know that you must re-set the ECU after replacing any of these sensors. I am also guessing that Genuine Nissan Sensors were used and not aftermarket ones? There were cases of brand new sensors not working correctly straight from the packaging.

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20/Feb/2015, 9:27 am Link to this post Send Private Message MSN Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
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Re:


Thanks again for the reply.

Yep, genuine nissan sensors were used.

I mentioned to him that it may be the throttle position sensor but he is of the opinion that it's an earthing issue. Apparently there's no earth connection which he believes is causing the sensors to not work, so he's acquired the wiring diagram to try and figure out where things have gone amiss.



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2007 T30 ST-S Extreme
25/Feb/2015, 10:50 pm Link to this post Send Email PM   Send Private Message Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
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Re:


Latest news is that it is likely the timing chain has stretched/worn throwing the timing out. I guess we were sent on a wild goose chase with the sensors.

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2007 T30 ST-S Extreme
2/Mar/2015, 5:18 pm Link to this post Send Email PM   Send Private Message Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
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Re:


...and latest latest news after addressing the timing chain is that there is no compression. Suggesting head gasket failure?

I'm surprised it could be something mechanical, as the car was driving fine one day then wouldn't start the next. No other engine issues to report.

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2007 T30 ST-S Extreme
13/Mar/2015, 6:37 pm Link to this post Send Email PM   Send Private Message Blog
 
crventura Profile
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Date Registered: 11-2014
Location: Melbourne
TOTAL POSTS: 22
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Re:


for anyone who may still be playing along at home...

The timing chain has been fixed and the head was rebuilt due to a lack of compression in the first 2 cylinders. Apparently there was a heap of gunk built up which prevented the valves from closing fully.

Whilst I'm not a mechanic, I thought it was a bit early for this kind of work to need to be done, and I didn't notice any drop in power or fuel economy in the lead up to all this, although I noticed the oil was a bit low and topped it up about a week prior to when the car stopped.

For reference, the X trail I had before this one saw ~130,000km without any such work, which is about double what my current x trail has done.

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2007 T30 ST-S Extreme
19/Mar/2015, 10:39 pm Link to this post Send Email PM   Send Private Message Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5406
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Re: X trail won't start


When you say the chain was done, what needed doing to it ? Was it stretched, faulty tensioner or jumped a tooth ?

With the gunk build-up, what type of fuel are you using ? 91, 95, 98 "brand-name" or small independent reseller ? Have you used any fuel additives or oil additives ?

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Kev X450(c) T30 Guru
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20/Mar/2015, 3:57 pm Link to this post Send Email PM   Send Private Message Blog
 


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