Fg Xr6T Bad Idle....coils?

[IH8TOADS]

Next time it does it, turn the car off straight away and re-start and see if it does it.

Also as suggested above, check the basics via datalogging in the first instance.

What's maintenance like on the car? How old are the plugs and coils? Have the injectors ever been cleaned? Is it the original O2 sensor? Etc etc

[PTR_NITRO_FG]

We are talking about an exhaust manifold, not an inlet manifold. No spraying.

I hope I have not given you a run around. If you put up a video without surrounding noise in the background it would be alot easier to hear.

Generally the noise will stay the same hot or cold.

How would an exhaust leak be fixed? Would it mean just new gasket and then retorque and should be fine? Or are you supposed to put gasket sealant or some type of goo to block it up?

You haven't given me the run around mate....just wanted to get some ideas before getting a mechanic to look over it. The other problem is that it will be hard to show to a mechanic..since its intermittent

And yeah I will try another video next time it happens...but if it's in the same spot as above video; the background noise is next to impossible to get rid of (top floor of carpark and wind blows around + exhaust is close to walls).

New symptom was very very mild miss/rough idle at the lights today. So tiny that it doesn't move the needle at all but can feel the car/wheel moving the tiniest bit. But I've heard that even stock these cars can sometimes miss a little bit I.e. think I remember reading that their idle became better after a good tune and 1000cc injectors.

I should probably try one of those fuel system cleaner bottles in my next tank of fuel as well.

Next time it does it, turn the car off straight away and re-start and see if it does it.

Also as suggested above, check the basics via datalogging in the first instance.

What's maintenance like on the car? How old are the plugs and coils? Have the injectors ever been cleaned? Is it the original O2 sensor?

Thanks bud....next time it happens I will try the immediate shut off and restart and see if it still runs rough.

Datalogging requires the use of HP tuners? I only have an SCT X4....so think I can log some things (think theres a list for up to 8 things that can be monitored...but they are pretty basic stuff). Again since its so intermittent; not sure if I should have the x4 plugged in every time I start the car (and would be annoying lol).

Maintenance is pretty basic so far...owned the car since 82000kms...its now just past 132000kms. Pretty sure everything is stock (service history shows he serviced every 10,000kms but NFI if any parts have been replaced so can only assume its all old dying stuff lol).

I have had the injectors cleaned whilst in the car...I think they put a machine on injectors and clean the rail, etc??? Was done probably 20k kms ago. Plugs and coils have not been changed during my ownership (hence thread title). Same situation with 02 sensor.

So so far the possibilities could be:

1) exhaust leak (check manifold and dump areas)

2) intake manifold leak

3) coils

4) plugs

5) o2 sensor

6) maybe TB clean??? (Again this hasn't been done since around 90000km mark).

Thanks for the input guys and sorry about the massive post!

[turbotrana]

Pretty sure not intake manifold leak, nor coils or plugs nor T/B clean.

I Just listened to the video again. Pretty sure there is an exhaust leak. Could be loose manifold/turbo bolts where bolts just need to be tightened to you having to remove manifold and replacing gaskets with factory ford gaskets and no goo. Just tighten up properly. If turbo bolts loose you may need to invest in some special bolts available that don't come loose as easily.

Do that and see what happens. Whilst you are in the area of the turbo I would even maybe replace the o2 sensor with a good quality one.

I could imagine an exhaust leak playing with 02 sensor readings so that is why I would rectify the leak first then go from there.

Pretty sure you do have a data logger with your handheld SCT . You got to download the software and learn to use it. You can even check error codes

Dont bother with an injector cleaner either.

[PTR_NITRO_FG]

Thanks for the tips Tony!!!!

Ok....well if my mechanic dude will be prying around in the area, I may as well just do it all and see if it makes a difference.

Is OEM Ford gasket best or is the ebay ones ok? (I think the brand is called permaseal last time I was looking around). Is there a gasket on the dump pipe to turbo from factory (and also the rear housing to exhaust manifold)?

I think there was a thread recently where Jet recommended MTQ or Soniq performance for the turbo studs, so I'll see what the prices are.

Also same again with o2 sensor....is there a specific brand to get? OEM is bosch?

And I'll research about the software and datalogging....guess it could be helpful to know anyways. And did a scan 10 days ago and didn't come up with any errors...

You don't rekon injector cleaner stuff works? Cause I feel a difference when I've used it in the past I.e. lets the engine rev more freely.....but maybe that's a placebo effect and all in my head? hahaha

cheers!!!!

[Tocchi]

Fixed yet? I have a solution

[PTR_NITRO_FG]

Should have done this one.... lol

and nah been waiting for you to offer some help

But I did figured out that I can sometimes make it happen (only done it twice since)....it needs to be cold/first start and just tap accelerator so it very quickly revs just past 1000rpm then it will drop and do the rev hunt thing.

Plan is still to do the above and buy gaskets, turbo bolts and o2 sensors...as I'm sure its probably good maintenance to do it every 125,000kms...still gotta sort the vibrations too (its a really firm/rough drive and now the vibrations start happening in the 120+ zone - which I can never show to a shop cause they'll just say do the speed limit f*ckstick....). Hopefully tax comes in soon

[Tocchi]

and nah been waiting for you to offer some help

You have a point, here is my help:

Book it into MT or XFT so you aren't chasing your tail with symptoms.

The cost of the inspection will be negated by the savings of you changing those parts

[PTR_NITRO_FG]

But what if it doesn't do the rev thing when its there? I'd have to leave it overnight so they can try in the morning, and still very little chance it will happen.

Or will they have special devices to pick it up? I.e. no codes come up on the x4.

Also side note; do you know if there's a OEM gasket between dump pipe and turbo? And is there one between exhaust manifold and turbo?

thanks for the help Mr Tocchi

[IH8TOADS]

125,000 kms and you don't know when the plugs and coils have been changed? Regardless if you have a problem or not....put new genuine coils and plugs in (if stock) if these have not been changed already.

Have you tried what I suggested (re-starting the car)?

You need someone with a laptop and an understanding of a logging program to help you. Otherwise take it to a decent ford dealership or tuner for a diagnosis.

[PTR_NITRO_FG]

Yeah I think Fraud guy said it normally gets changed at 150,000kms? (assuming they use iridiums from factory?).

I've been putting it off for just before I get my tune done....getting close now and yep was going to go OEM plugs but with NGK iridiums

And yep....when I turned the car off and straight on again, it didn't do the rev hunting thing the second start up. But next time it does it, I will turn car off then on....if it doesn't do it again, I will try that accelerator tap thing that I mentioned a few posts above (to see if I can get it to rev funny on second start up).