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17-10-2009, 09:38 PM
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#1 | ||
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Winter all year round
Join Date: Jan 2005
Location: Sydney
Posts: 671
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Hi guys, got a minor niggle with the AU which I hope someone might have some suggestions about.
When the car is at operating temperature in drive/reverse (auto) idle speed is about 650rpm. Idle is smooth but when I turn on the AC or turn the wheel (when it's not rolling) the revs drop. This is normal and the ISC will compensate to raise the revs, but it's slow to react and the revs drop down to about 400rpm and naturally the car starts to shake. Within about 2-3 seconds the ISC compensates and the revs come back up. It's quite annoying and I don't thing it should take that long for the revs to compensate. Here's the stats; -Car has done 95,000 clicks -Has new Air filter, fuel filter. -Just cleaned the throttle body (which was dirty) I've pulled the ISC off and there is a light carbon residue inside but nothing major. Do you think the ISC is sticking? Any suggestions?
__________________
Some people drive sports cars on the weekend....I drive my AU! It's not what you drive...it's how you enjoy it. Recommend trading with Mechan1k, Offyaguts, EDMONTY, PhantomXR8, HOTC2R, Partie & JC |
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17-10-2009, 09:41 PM
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#2 | ||
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FF.Com.Au Hardcore
Join Date: Apr 2009
Location: jimboomba
Posts: 4,638
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reset the ecu
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Welder/Fabricator at Beaudesert Exhuast Posted by Xcabbi, Does it slap or rattle? Rattle is more to do with timing chains and tensioners. Slap is more to do with lifters, rings, bearings or GENIII boat anchors |
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17-10-2009, 09:54 PM
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#3 | ||
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Winter all year round
Join Date: Jan 2005
Location: Sydney
Posts: 671
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Hmmmm did that not long ago when the battery was replaced. Did the whole procedure with Park/drive AC/No AC.
But then again this was before the throttle body clean. Ok i'll give that a try.
__________________
Some people drive sports cars on the weekend....I drive my AU! It's not what you drive...it's how you enjoy it. Recommend trading with Mechan1k, Offyaguts, EDMONTY, PhantomXR8, HOTC2R, Partie & JC |
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17-10-2009, 10:01 PM
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#4 | ||
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FF.Com.Au Hardcore
Join Date: Apr 2009
Location: jimboomba
Posts: 4,638
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or you might have a vacum leak some where, good luck finding it
__________________
Welder/Fabricator at Beaudesert Exhuast Posted by Xcabbi, Does it slap or rattle? Rattle is more to do with timing chains and tensioners. Slap is more to do with lifters, rings, bearings or GENIII boat anchors |
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17-10-2009, 10:07 PM
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#5 | ||
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Winter all year round
Join Date: Jan 2005
Location: Sydney
Posts: 671
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yeah that's what I was worried about......there is a light hissing sound in the engine bay when the motor is running but it could be air intake. Me thinks a better start looking for leaks!
__________________
Some people drive sports cars on the weekend....I drive my AU! It's not what you drive...it's how you enjoy it. Recommend trading with Mechan1k, Offyaguts, EDMONTY, PhantomXR8, HOTC2R, Partie & JC |
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17-10-2009, 10:10 PM
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#6 | ||
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FF.Com.Au Hardcore
Join Date: Apr 2009
Location: jimboomba
Posts: 4,638
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check the air intake, bbm gasket,
use some water and spray it around with it running to see where it is leaking or sucking it in
__________________
Welder/Fabricator at Beaudesert Exhuast Posted by Xcabbi, Does it slap or rattle? Rattle is more to do with timing chains and tensioners. Slap is more to do with lifters, rings, bearings or GENIII boat anchors |
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18-10-2009, 12:00 AM
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#7 | ||
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Flairs - Truckers Delight
Join Date: Aug 2006
Location: Brisbane Northside Likes: Opposite Lock
Posts: 5,731
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do the ISC clean with carby cleaner anyway
there's no idle up solenoid for the A/C on an AU, is there? It's all controlled by EEC-V, right?
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Current: Silhouette Black 2007 SY Ford Territory TX RWD 7-seater "Black Banger"
2006-2016: Regency Red 2000 AUII Ford Falcon Forte Automatic Sedan Tickford LPG "Millennium Falcon" |
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18-10-2009, 06:12 AM
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#8 | ||
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Just slidin'
Join Date: Sep 2005
Location: Brisvegas
Posts: 7,791
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You can turn the base idle up on the throttle body if your keen, wouldnt reccomend it for a long term fix though.
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MD Mondeo - For the family
NP Pajero - For the adventure |
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18-10-2009, 09:02 AM
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#9 | ||
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Just another mock-up..
Join Date: Sep 2006
Location: In an AU Fairlane somewhere...
Posts: 9,966
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had the same thing happen with mine mate...
would turn the steering and it would almost die.. would put AC on an it would almost die.. It was a vacuum leak and a pain in the butt one at that.. Manifold Gasket... Check to see all the manifold bolt are tight (where manifold meets head) You may have a number of little splits in the gasket like mine did.. cheers kris
__________________
Desire isn't driven by the heart, the mind or the wallet. Desire comes from another place. It's created by the smell of burnt fuel under full throttle and the look a car gives you when you're washing it alone at night... see my car here: Built my own TL50!!! [SIGPIC][/SIGPIC]
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18-10-2009, 09:45 PM
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#10 | ||
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Winter all year round
Join Date: Jan 2005
Location: Sydney
Posts: 671
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Kristo did your mirrors shake at idle?? mine does it randomly. I recall seeing a residue around the head/manifold gasket, but the rocker cover is definitely not leaking, so it could be some loose bolts or failed gasket.
__________________
Some people drive sports cars on the weekend....I drive my AU! It's not what you drive...it's how you enjoy it. Recommend trading with Mechan1k, Offyaguts, EDMONTY, PhantomXR8, HOTC2R, Partie & JC |
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19-10-2009, 09:15 AM
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#11 | ||
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Just another mock-up..
Join Date: Sep 2006
Location: In an AU Fairlane somewhere...
Posts: 9,966
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yeah my mirrors did shake...lol
yeah it could be.... check to see if the bolts are all tight first.. then, while the car is running spray some WD40 over the gasket.. If the idle changes or you see it seeping in through the gasket, then you have small splits in the gasket and it needs to be changed... I did this and found the problem.. cheers kris
__________________
Desire isn't driven by the heart, the mind or the wallet. Desire comes from another place. It's created by the smell of burnt fuel under full throttle and the look a car gives you when you're washing it alone at night... see my car here: Built my own TL50!!! [SIGPIC][/SIGPIC]
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19-10-2009, 09:43 AM
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#12 | ||
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Winter all year round
Join Date: Jan 2005
Location: Sydney
Posts: 671
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After reading your post last night at 10pm I popped down to the garage and the first three bolts I checked turned about 15 degrees! When I next get a chance i'll go over them all & if that doesn't work then i'll go for the WD40. Cheers, thanks for your help so far!
__________________
Some people drive sports cars on the weekend....I drive my AU! It's not what you drive...it's how you enjoy it. Recommend trading with Mechan1k, Offyaguts, EDMONTY, PhantomXR8, HOTC2R, Partie & JC |
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19-10-2009, 09:48 AM
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#13 | ||
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Just another mock-up..
Join Date: Sep 2006
Location: In an AU Fairlane somewhere...
Posts: 9,966
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no worries mate...
__________________
Desire isn't driven by the heart, the mind or the wallet. Desire comes from another place. It's created by the smell of burnt fuel under full throttle and the look a car gives you when you're washing it alone at night... see my car here: Built my own TL50!!! [SIGPIC][/SIGPIC]
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19-10-2009, 07:35 PM
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#14 | ||
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Winter all year round
Join Date: Jan 2005
Location: Sydney
Posts: 671
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Ok, got home tonight and decided to try some of the advice. I checked ever manifold bolt, all manifold to head bolts needed tightening (minor). Then I pulled the ISC off and cleaned it.
I think the ISC was sticking. I tried to move the valve with a screwdriver but it didn't move freely, so i cleaned it out a little and it moves much more freely and returns quickly. At operating temperature the rev drop when I engage the AC is about 50rpm now compared to the 200rpm drop previously. And there is no drop when I turn the wheel at a stand still. This weekend i'll clean ISC further as there appears to be still be more carbon built up on the shaft as it enters the solenoid that needs to be cleaned off. Then i'll do an ECU reset. Looks like this was the culprit. Thanks the advice of all, i'll let you know the weekends outcome. Cheers, Adrian.
__________________
Some people drive sports cars on the weekend....I drive my AU! It's not what you drive...it's how you enjoy it. Recommend trading with Mechan1k, Offyaguts, EDMONTY, PhantomXR8, HOTC2R, Partie & JC |
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19-10-2009, 10:27 PM
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#15 | ||
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Just another mock-up..
Join Date: Sep 2006
Location: In an AU Fairlane somewhere...
Posts: 9,966
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glad to hear its not the manifold gasket mate...
they're a pain in the butt...
__________________
Desire isn't driven by the heart, the mind or the wallet. Desire comes from another place. It's created by the smell of burnt fuel under full throttle and the look a car gives you when you're washing it alone at night... see my car here: Built my own TL50!!! [SIGPIC][/SIGPIC]
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Problems at Idle
Linear Mode
