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Wolfie 2006 Profile
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Date Registered: 02-2006
Location: Abbotsford, Sydney
TOTAL POSTS: 4
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Problems with Idle Revs


Hi Guys,

I had my car serviced at the Nissan Service Centre in Haberfield (50,000km). I asked them to also look at the idle revs as they appeared rather high (just under 1,000 revs). Looks like that is normal though... But, since then the engine displays some "interesting" behaviour. When starting up the revs go up to ~2,000 and stay there for a few seconds before dropping back to around 1,500 for a few seconds and then slowly going down to around 1,200/1,000.

When taking the foot off the gas and pressing the clutch (like one would do when shifting gears) the idle revs stay where they were before taking the foot off the gas for about 3 to 4 seconds before going down to 1,500 where they stay for 2 or 3 seconds and then dropping to ~900.

When letting the car roll down a hill in first gear and the revs go up to 2,000 engine breaking is noticeable, the car slows down, the revs go down to 1,500 when the car suddenly speeds up again (up to 2,000 revs)
This is really annoying when approaching a red traffic light and the car stays in gear, it slows down until the revs hit 1,500 when it suddenly starts speeding up again.

This started happening after i got the car back from the Nissan guys in Haberfield. Their response to the first inquiry why the idle revs where to high was that some floating "thingy" was extremely dirty and had to be cleaned. Now I am not sure that that was the correct diagnosis. I am not taking the car back to them as I amextremely unhappy with their service (didnt do things they were supposed to do, did things they were NOT supposed to do)...

Do you have any sugestions what the problme could be? I have booked the car in at Rockdale Nissan, but I would like to know what I should tell them where to look :-)

Many thanks for your help,
Wolfie
24/Feb/2006, 2:46 pm Link to this post Send Email PM   Send Private Message
 
basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Re: Problems with Idle Revs


I know the X-Trail has a variable-length air intake manifold - perhaps this was the "floaty" thing they "cleaned"...

The only suggestion I can think of is to reset the ECU (discussed in other threads) - the easy way is to disconnect the battery overnight (and thus requires re-entering of radio security code) or if you can find the other related thread(s) they mention which fuse to remove (and avoid having to re-enter the radio code).

This may or may not fix it. If you've only just got it back from service, theoretically they should've reset the ECU (even without telling you) - if that's the case, it may still be in it's "self-learning" time period so you may just have to put up with it for perhaps a couple of hundred kilometres or so until the ECU figures out part of the engine has been "cleaned"...



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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.
24/Feb/2006, 3:23 pm Link to this post Send Email PM   Send Private Message MSN Yahoo Blog
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: Problems with Idle Revs


 I believe this is normal of the exee (well I hope it is).emoticon

 Prior to doing the ECU reset, my 'warm engine' revs at idle were a fraction over 1000. Since the reset, it is around 800-900. Mine does display similar traits at start-up when cold, immediately rasing to 1800 or so and then dropping to about
900 after a few seconds.

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BRETT72 - X235

24/Feb/2006, 3:25 pm Link to this post Send Email PM   Send Private Message MSN
 
Wolfie 2006 Profile
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Date Registered: 02-2006
Location: Abbotsford, Sydney
TOTAL POSTS: 4
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Re: Problems with Idle Revs


The only other thing I have noticed is an increase in fuel consumptopn :-( Used to be around 10-11 l in city driving and now it is more like 12 and above. I have never noticed that kind of behaviour after a service before. Will keep an eye on it and if it does not improve I may need to reset it :-)

Great forum btw, I am glad I found you guys :-D

Cheers,
Wolfie

What are the chances of getting the diesel version down under?
24/Feb/2006, 7:45 pm Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Problems with Idle Revs


Hi Wolfie and welcome to the forums.

As Rich suggested above you can either reset the ECU yourself or when you take it to Rockdale Nissan ask them to do that for you. It's free of charge.

Please feel free to visit the Introductions section of the forum, and tell us more about yourself when you have time: Introductions


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24/Feb/2006, 7:57 pm Link to this post Send Private Message MSN Blog
 
AKAK9 Profile
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Date Registered: 01-2006
TOTAL POSTS: 133
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Re: Problems with Idle Revs


I'd wager it's a clagged O2 sensor.

Common problem with a lot of Jap cars as they run very rich. If the O2 sensor has carbon build up it reads lean and thus the ECu adjusts to suit, a by product of this being higher idle.

Only way to be sure is to pop it on a Consult.
25/Feb/2006, 10:57 pm Link to this post Send Email PM   Send Private Message
 
Xtrailgb Profile
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Date Registered: 01-2006
TOTAL POSTS: 18
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Re: Problems with Idle Revs


Hello,

I know you don’t have the 2.2di in Aus, but a similar thing happens on my 2.2di (UK Spec)xt.
When dipping the clutch, pulling up towards a junction, the revs average 1300 for about 2 seconds, then drop to 1000 as stop, then drop again to 750 only when I have come to a complete standstill. If I move off free wheeling then the revs go back up to 1000 rpm.
Nissan explained it was to do with engine emission controls and is perfectly OK. It also helps keep the vacuum pump pressure up for the brakes when the clutch is dipped (only applicable to diesels).

It is all controlled via the ECU and speed sensors.

Hope this helps.
Mark


---
2003 Mk1 2.2di - Based in UK (Cheshire)
1/Mar/2006, 8:09 am Link to this post Send Email PM   Send Private Message
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: Problems with Idle Revs


 I searched, but couldn't find a related thread...so here goes.

 My wife has just told me that the exee has developed a problem with stalling at the lights and also surging when travelling at between 40 and 60kph. Prior to my wife going away (with the car), I had it looked over and the ECU was reset to +17. It has done 800kms since the reset and always run on Shell Optimax. The other day she put in Caltex Vortex 95 Premium, as there were no Shell's around.

 Could this have caused the problem, or is there somewhere else I can check. I don't want to send her to Nissan, for them to pull one over her.

 The spark plugs are new and I freshly cleaned/oiled the K&N before she left.

 The car has only done 38,000 so the fuel filter/pump should be ok.

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BRETT72 - X235

1/Mar/2006, 10:33 pm Link to this post Send Email PM   Send Private Message MSN
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Problems with Idle Revs


Hi Brett,

Could this be related to the timing advance you have recently asked the dealer to do and which may require you run on higher octane all the time?

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1/Mar/2006, 10:37 pm Link to this post Send Private Message MSN Blog
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: Problems with Idle Revs


 Yeah I thought that, but on the other hand, the Caltex Vortex is 95RON which should be ok.

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BRETT72 - X235

1/Mar/2006, 10:42 pm Link to this post Send Email PM   Send Private Message MSN
 


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