exhaust/manifold issues

[olly22n]

Hi guys.

My car now sounds like a tractor, and the noise seems to be coming from the exhaust manifold.:bigcry:

Are they known to crack? The car is now running like a bag of nails at low rpm/part throttle. It is fine once the revs are up and there are no warning lights, oil is fine, no funny smells etc etc...

Any ideas?

:)

[AlexGTT]

Very rare. The manifolds are excellent quality. Are you sure it's not a joint further onto downpipe?

[olly22n]

Had my hands round the join to the cats, nothing there, and the noise is coming from further towards the engine.

[olly22n]

reading this http://www.cslregister.com/forum/showthread.php?p=101327#post101327

thread, could it be a coil pack? It clears itself the higher up the rev range you go. Worst at tickover (both noise and misfire/hesitation).

It came on suddenly, it went from perfect to borked in a blink of an eye

[shane@mbtech]

If your car is misfiring it will make the exhaust sound noisier.

Get your car checked ASAP and dont drive it in between.

A misfire can have many origins, a coilpack being one.

Other possibilities are head gasket issues- which seem very popular at present.

Where are you based? If you're local I will take a quick gander for free.

[olly22n]

If your car is misfiring it will make the exhaust sound noisier.

ok, explains that then.


Get your car checked ASAP and dont drive it in between.

A misfire can have many origins, a coilpack being one.

Other possibilities are head gasket issues- which seem very popular at present.

Had to drive it 8 miles home, but that was extremly gently, need to drive it 4 miles tomorrow to the garage. WIll that be ok?


Where are you based? If you're local I will take a quick gander for free.

stamford lincs chap, miles from warrington.


One other thing, the car changing instantly while driving, would a coil pack/headgasket go just like that?

[olly22n]

a video, although hard to hear what is happening..

http://i63.photobucket.com/albums/h126/olly22n/th_VID00041-20111106-1648.jpg (http://s63.photobucket.com/albums/h126/olly22n/?action=view&current=VID00041-20111106-1648.mp4)

[shane@mbtech]

ok, explains that then.



Had to drive it 8 miles home, but that was extremly gently, need to drive it 4 miles tomorrow to the garage. WIll that be ok?



stamford lincs chap, miles from warrington.


One other thing, the car changing instantly while driving, would a coil pack/headgasket go just like that?

Only drive it where you need to and very gently.

A misfire just happens, like a light bulb going, it either misses or it doesnt. It will feel funny because its probably not running on all 6 cyl.

[olly22n]

Only drive it where you need to and very gently.

A misfire just happens, like a light bulb going, it either misses or it doesnt. It will feel funny because its probably not running on all 6 cyl.

Thank you!

Hopefully is just something nice and simple.

[olly22n]

All sorted!

BMW service came out and changed the coil packs, all super smooth now.:thumbs:


Search keywords; coil packs, hesitation, rough running, mis fire, misfire, chugging

[shane@mbtech]

All sorted!

BMW service came out and changed the coil packs, all super smooth now.:thumbs:


Search keywords; coil packs, hesitation, rough running, mis fire, misfire, chugging

Good nice happy ending:beer:

[CraigMillwardCroft]

Glad you go it sorted, sounded okay to me from the video :thumbs:

[Bounce]

Glad your sorted.:thumbs:

[olly22n]

I must admit, I love having a warranty.

[giraffe]

Nice 1 :thumbs:

[bryce]

Im wondering if my car is hesitating...

When I punch the throttle from idle theres a slight delay in revs, but if I do it from 1200rpm+ its no problem.

Been a lonnnnng time since Ive driven the car so maybe its always been like that, Running perfect otherwise.

[olly22n]

Before this problem, I thought mine was running well, and since changing the coil pack it is noticably smoothly at low rpm, part throttle and from closed throttle.

[AlexGTT]

Good news. :thumbs:

[olly22n]

and, in addition, I think I have finally mastered the SMG gearbox.