Revhead Kev
Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6355
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Re: Very Rough Idling
Hi Dan,
First couple of questions which come to mind are...
1. Does the Xtrail drive fine at normal speeds and does it seem to have normal power and acceleration ?
2. What rpm does the tacho sit on when trying to idel ?
--- Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
My CarPC Worklog
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5/Aug/2008, 9:17 pm
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Very Rough Idling
Hi Dan,
If the dealer adjusted the idle and performed the idle re-learn and it didn't stay the same, then is could possibly be a faulty MAF (air flow) sensor which is sending an incorrect reading to the ECU and confusing the idle.
Have you checked the condition of your air filter?
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5/Aug/2008, 9:37 pm
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Eggins
X-TRAIL ENTHUSIAST
Date Registered: 08-2004
Location: Brisbane
TOTAL POSTS: 184
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Re: Very Rough Idling
I'd definitely try the Idle Air Relearn myself, and do the pedal position things beforehand - the whole procedure! It takes a few attempts to get this right.
Print out the whole procedure, do the first couple of steps to get pedal position and throttle closed positions right, then go for a drive and warm everything up. Pull over somewhere and do the Idle Air Relearn, then drive around again for a while. Try highway and backstreet use.
DIY Idle Air Relearn
Idle should end up being about 900rpm, and you'll know if it all worked OK.
--- Shawn and Belinda Eggins
2003 STR, K&N, Strut brace, Ground wires, Dunlop LM702's, Tint, Mud flaps, Tow, Nudge, Spots, Mats, Rear scuff plate
http://eggins.synthasite.com/
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7/Aug/2008, 5:14 am
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Revhead Kev
Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6355
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Re: Very Rough Idling
Hi Dan,
An ECU reset would not hurt so you may as well try it.
Replacing the MAF is a very easy job.
All you need to do is disconnect an electrical connector, undo a hose clamp, undo 4 bolts holding the MAF housing to the top of the filter box and the MAF is free.
Reverse the steps to put the new one on.
Cost ?
Probably pick one up cheaper from a wreckers rather than a new one from a dealer.
--- Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
My Blog
My CarPC Worklog
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7/Nov/2008, 9:58 pm
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Robbo0001
BANNED USER
Date Registered: 07-2008
Location: Brisvegas, Australia
TOTAL POSTS: 1063
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Re: Very Rough Idling
The easiest, and possibly cheapest thing to do, is change the spark plugs.(if your mechanic hasnt done it)
It is impossible to bench test a spark plug that has a heat problem.
I have discovered that the Consult will test down to "coil pack" level....but an intermittent or "misfiring" sparkplug is bloody hard to find ..If the fault is caused by temp or circumstance, a cheap set of new NGK plugs put in and a drive,will let you know if a plug has failed
If all the electronic resets fail, and no fault code comes up....go the plugs.
At speed you wont notice it...at idle and with load (aircon, radio etc) it will be...
hope this is of help.
Edit...I hope they didnt put your "cooked" spark plugs back in after your head went
Last edited by Robbo0001, 7/Nov/2008, 11:17 pm
--- Dave
99 GU Patrol 2.8TD
Ex-2002 T30 TI Xtrail
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7/Nov/2008, 11:01 pm
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