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Old 09-06-2007, 11:30 PM   #1
GSN
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Default AU II XR8 Rough Idle and Hunting

G day guys great forum you have here.

First off ive searched through the site and found a few posts about this but ive pretty much covered all the suggestions so far. Basically the XR8 runs very rough and misses at idle and when ur driving along (its auto) and hold ur foot at a constant position (most noticeably at about 1/3 throttle) is will hunt, meaning u feel the car surge forward then drop off. So far ive done leads, MAF, O2's etc and still no joy, its still under warranty but every ford dealer i goto just says yeah its running rough but its not spitting out any error codes. It gives me the %&^$'s because they admit theres a problem but they wont do anything about it. All they do is slug me for intake clean etc every time it gets serviced.

Now does anyone have any ideas what it might be? Also is there anything that might cause it that wont show up as a fault code (mechanical maybe?).

Any ideas would be great.
Is there any good dyno place in Perth that people recommend that maybe would do a good diagnostic run on it, A/F ratio etc that might shed some light.
Cheers,
Brett

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Old 10-06-2007, 01:28 AM   #2
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You could give BPT a Call they are a site sponsor and they deal with fords everyday.

Terry or barry Ph 9302 3415

Dave

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Old 10-06-2007, 04:30 AM   #3
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Dave cheers mate I will give them a call on Monday, never new about them and I live 15mins away.
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Old 10-06-2007, 11:21 AM   #4
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i had the same sort of problem in my old xh ute i went to a place in wangara Car-Go Gas 9302 1941. they did a full carbon clean of the fuel and intake that seemed to solve the problem

mark
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Old 10-06-2007, 03:03 PM   #5
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Yeah I was thinking injectors, maybe coil packs? but ive been slugged for fuel system cleans and stuff already I dont think they ultrasonically clean them either just on the car. So maybe an ultrasonic clean on the injectors also.
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Old 12-06-2007, 11:42 PM   #6
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Well called into BPT yesterday as I was in the area, great guys i think i spoke to Barry. within 1 min in the car park he pulled th lead off the ISC and she stalled straight away wouldn't start or run so hopefully we are getting somewhere with this.

FORD 12months no result
BPT 1min already onto something

car is booked in for a full diagnostic run/check next tuesday ill see how it goes.
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Old 12-06-2007, 11:45 PM   #7
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Goodstuff mate hope they get it sorted nice and cheap for you. :
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Old 13-06-2007, 01:02 AM   #8
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My car did this and it turned out one of the cats had collapsed in the exaust. I had full power in 4 cyl and the other 4 couldnt breathe cause the cat was blocked. I took the pieps of and the contense of the cat fell out of the exaust. Might be an idea to check this if it is showing any errors on the ford computers.
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Old 17-11-2012, 12:26 PM   #9
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Default Re: AU II XR8 Rough Idle and Hunting

hi.i have exactly the same problem with my AU XR8 , thats been driving me nuts.
can you tell me what ended up fixing your vehicle once you took it to BPT.
thanks
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Old 18-11-2012, 06:47 PM   #10
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Default Re: AU II XR8 Rough Idle and Hunting

archeologists have unearthed Egyptian remains younger than this thread...
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Old 18-11-2012, 07:36 PM   #11
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Default Re: AU II XR8 Rough Idle and Hunting

archeologists do however provide us with useful imformation,unlike your reply
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Old 21-11-2012, 07:22 PM   #12
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Default Re: AU II XR8 Rough Idle and Hunting

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archeologists do however provide us with useful imformation,unlike your reply
Snap! hahaha
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Old 21-11-2012, 11:24 PM   #13
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Default Re: AU II XR8 Rough Idle and Hunting

More than likely a sensor playing up or even a vacuum line off some ware , hard to track down with out starting a replace and see program and not cheap . mite be easier to get a friendly workshop to take a look for you.
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Old 21-11-2012, 11:30 PM   #14
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Default Re: AU II XR8 Rough Idle and Hunting

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More than likely a sensor playing up or even a vacuum line off some ware , hard to track down with out starting a replace and see program and not cheap . mite be easier to get a friendly workshop to take a look for you.
or sell the car and buy an FG Turbo Ute. Problem solved.
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Old 21-11-2012, 11:44 PM   #15
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Default Re: AU II XR8 Rough Idle and Hunting

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or sell the car and buy an FG Turbo Ute. Problem solved.

Blasphemy Austin.
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