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jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29088
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Re:


Have you inspected the catalytic converter internals?

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9/Aug/2014, 11:00 pm Link to this post Send Private Message MSN Blog
 
xr5turbo Profile
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X-TRAIL NEWBIE
 


Date Registered: 07-2013
Location: Dee Why
TOTAL POSTS: 34
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Re: Intermittent Rough Idle when coming to a halt.


I asked the mechanic some time ago to do a visual inspection to check this, he said it was ok but I have my doubts now. You could be on the money with the cat, it seems to be the only probable cause particularly if it's partially damaged or blocked, engine under load and extra back pressure causing the stall. The xtrail does seem a little limited power wise under hard acceleration driving up hill, not obvious but I feel like maybe something could be limiting it.

Did a quick check on the coils, they are aftermarket I think, Hanshin or something, installed by previous owner, not sure how old but the 4 appear ok, engine runs rough disconnecting each as expected. Looks like a cat inspection is warranted and back pressure test as well I guess.

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2002 X-Trail ST T30 Series 1 Titanium Silver
MY05 Subaru Forester XT with MRT XA kit.
10/Aug/2014, 8:52 pm Link to this post Send Email PM   Send Private Message Blog
 
xr5turbo Profile
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X-TRAIL NEWBIE
 


Date Registered: 07-2013
Location: Dee Why
TOTAL POSTS: 34
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Re:


So I thought I should post back with what happened to the xtrail, essentially it is bad news. Jalalski was correct, cat converter is destroyed, massive hole and what looked like blockages in the substrate so it is no wonder the engine stalled under high load.

Image

It's obvious now that my engine is toast, the ceramic has damaged it, and confirms 100% why the engine uses oil.

As an aside to this, and before knowing just how bad the cat was I had already sourced and new MAF & o2 (genuine Nissan) from Dubai and a high quality after market Sentra manifold/cat from the US for a reasonable cost. I went ahead and fitted parts knowing the engine realistically needs a rebuild or replacement, however surprisingly the xtrail has never driven better since owning it. I can report all issues mentioned in this thread have been resolved, so I intend to keep driving it as is and continue to top off with oil as needed until such time as I can find known good condition wreckers engine (unlikely in my dealings thus far) or it stops and that's the end of it.

In the mean time I purchased an immaculate, low k, MT, MY05 Forester XT with an MRT XA kit and I am having some real fun with that and the Mrs is now driving the Xtrail, she likes it so is happy to keep driving it.




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2002 X-Trail ST T30 Series 1 Titanium Silver
MY05 Subaru Forester XT with MRT XA kit.
29/Oct/2014, 2:35 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:


Good to hear you got the problem identified and if the cylinder walls damage is not that bad your solution will last you for many years to come and you will only need to keep topping it up with oil.

Keep us updated on how it runs.

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29/Oct/2014, 6:25 pm Link to this post Send Private Message MSN 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: Intermittent Rough Idle when coming to a halt.


Being an 02 model the engine is getting old anyway so you should be using higher grade oil.
Mine was using about a litre of oil between services, getting to the low mark on the dipstick and having the light come on. So I changed from Castrol 5W30 to Penright 5W40 Synthetic and the oil consumption stopped.
Give that a try too.

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Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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1/Nov/2014, 7:58 am Link to this post Send Email PM   Send Private Message Blog
 
xr5turbo Profile
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Date Registered: 07-2013
Location: Dee Why
TOTAL POSTS: 34
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Re: Intermittent Rough Idle when coming to a halt.


Yeah kev in the 18 months of owning this Xtrail I have experimented with a lot of oils, had the opportunity to do so because of how often its needs topping off, in that time I came to a few conclusions. In fact I just changed the oil over today, just in case there was still some of that cat in the oil, I used 15w50.

When I first got the xtrail I changed oil to 5w30 and after a week no oil was showing on the dipstick, I even tried as high as 25w70 at an oil change because this old QR25DE just shears the crap out of the oil but that was a mistake, the car simply would not idle and stalled. For me 15w50 seems to be the best compromise, motor has just shy of 240k km so oil consumption is to be expected anyway.

I also discovered a product called Engine Restore, have been using it in the xtrail for some time now, before anyone screams snake oil, this stuff does actually work within reason, it contains microscopic particles of Copper, Silver and Lead and this fills the voids created by wear over time, it restores compression in the motor lost over time due to wear, no silver bullet but it works.

I buy it (Amazon) from the US, goes in at each oil change. You certainly would not use this on a sound motor, but I knew early on I had nothing to lose by using it, instead of weekly oil top ups, I can get about 2500km before I notice oil disappearing off the dipstick again, with the added benefit that it makes the old motor incredibly quiet.
Costs about $10 a bottle and i recommend it for anyone who needs to buy time before dealing with the motor properly.

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2002 X-Trail ST T30 Series 1 Titanium Silver
MY05 Subaru Forester XT with MRT XA kit.
1/Nov/2014, 2:51 pm Link to this post Send Email PM   Send Private Message Blog
 


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