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FG XR6 Running Rough idle 

 

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 Post subject: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 12:25 pm 
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Location: Waterford Park
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Hey everyone,

so I have a 2008 FG xr6, has done approx. 262,000km (country and highway).
Has been running great, have owned it for 2 years in June.
I must admit, I am pretty slack and only had 2 or 3 oil changes in that time.

In Jan 2016, it started to have a very rough idle- the whole shakes.
I took it for a service, did the usual. However, mechanic couldn't find issue- thought maybe plugs or injectors.

So far, I have replaced plugs, replaced the injectors, replaced the inlet manifold gasket, changed throttle body and air flow sensor. Nothing has helped.

the car stutters and shakes at anything below 800RPM. it even stalls when the revs drop below 500rpm. Another mechanic has suggested a slipped timing chain, or perhaps the O2 sensor is clogged/dirty.

Any advice would help immensely!
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 12:29 pm 
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When was the last time the coils were changed?

When was the 02 sensor changed last?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 12:33 pm 
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I actually have no idea if the o2 sensor has ever been changed- not since I've had it, nor have I changed the coils. However, the coils have been tested- they were fine.

Another friend who is a mechanic believes the exhaust valve may be stuck?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 1:43 pm 
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o2 Sensors last about 90,000km. Coils around 100,000km.
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 1:45 pm 
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Is that common for them to get clogged up, on a standard non turbo?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 1:46 pm 
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Common on all cars. O2 sensors have a use by time and it is around the 90,000km mark.
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 2:03 pm 
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VIC, Australia

Thanks for the info... would you happen to know where they are located?
I was told under the rocker cover, near the cams?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 2:04 pm 
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reilly wrote:
Thanks for the info... would you happen to know where they are located?
I was told under the rocker cover, near the cams?


O2 Sensor or Coils?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 2:09 pm 
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o2 sensor
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 2:45 pm 
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Mounted in the Exhaust, should be one before the cat and one after.
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Wed Apr 27, 2016 3:24 pm 
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ahh, I thought they were at the front of the motor :?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Thu Apr 28, 2016 1:39 am 
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Could he have possibly skipped a tooth with timing chain ?

Id say get new coils b4 02 sensor that would only make you run little rough n rich op said its really rough idle

Any way to test restiance of coils ?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Thu Apr 28, 2016 9:23 am 
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I am a "she" , and that's what one mechanic suggested, a timing chain issue. He thinks it sounds like the car is trying to find the right revs.
Plus, my fuel consumption hasn't changed, which the o2 sensor would affect am i right?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Thu Apr 28, 2016 2:40 pm 
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Location: Adelaide
SA, Australia

reilly wrote:
I am a "she" , and that's what one mechanic suggested, a timing chain issue. He thinks it sounds like the car is trying to find the right revs.
Plus, my fuel consumption hasn't changed, which the o2 sensor would affect am i right?


Feels bad sorry about that

Amm i have heard a few of the xr6 turbo guys skipping teeth are you hard on the car?

Ya 02 if its bad would defiantly put fuel consumption down


I'm on timming chain coils or injector or pump

But while on the topic does anyone know what these obd2 connectors are like any software that the op she could use with her android phone etx to view errors?

As its only a simple $5 cable the computer might throw her a code and help us out any knowledge on the subject anyone?
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 Post subject: Re: FG XR6 Running Rough idle
Posted: Thu Apr 28, 2016 3:20 pm 
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Ride: FG XR6

Location: Waterford Park
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Thanks :)
Had the injectors replaced- no difference.

Will definitely check out the timing chain over the weekend.
Which Pump?
barraea wrote:
reilly wrote:
I am a "she" , and that's what one mechanic suggested, a timing chain issue. He thinks it sounds like the car is trying to find the right revs.
Plus, my fuel consumption hasn't changed, which the o2 sensor would affect am i right?


Feels bad sorry about that

Amm i have heard a few of the xr6 turbo guys skipping teeth are you hard on the car?

Ya 02 if its bad would defiantly put fuel consumption down


I'm on timming chain coils or injector or pump

But while on the topic does anyone know what these obd2 connectors are like any software that the op she could use with her android phone etx to view errors?

As its only a simple $5 cable the computer might throw her a code and help us out any knowledge on the subject anyone?
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