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      05-21-2017, 08:48 AM   #1
YH10
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Exhaust pause - is this normal.

Afternoon chaps,

I'm experiencing some abnormal behaviour with my exhaust and wondered if anyone has any insight into this. Not driven the car for couple weeks as I've had a few exams, last couple days on startup the exhaust would be as normal but every couple seconds would pause and continue. So when the smoke is coming out on cold start, on the pause the smoke would stop for a split second ...:

Has never happened before, the car is a e92 n55 335i..
I have a video, but can't seem to upload it...
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      05-22-2017, 03:50 AM   #2
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Sounds like its got a misfire?
It won't be the exhaust pausing, it will be the engine.
I'd get it scanned for any faults.
Does it drive ok? Do it do it once warmed up?
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      05-22-2017, 05:59 AM   #3
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Quote:
Originally Posted by dest View Post
Sounds like its got a misfire?
It won't be the exhaust pausing, it will be the engine.
I'd get it scanned for any faults.
Does it drive ok? Do it do it once warmed up?
Thanks dest..
You reckon it's a good idea to change the spark plugs ? I'm uploading the clip on to YouTube and then I'll post a link because I can't seem to upload it directly here..

Yea it drives absolutely fine, and once the 'cold start' is done it doesn't really happen, but occasionally really small ones..
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      05-22-2017, 06:58 AM   #4
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      05-23-2017, 11:14 AM   #5
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Quote:
Originally Posted by YH10 View Post
Afternoon chaps,

I'm experiencing some abnormal behaviour with my exhaust and wondered if anyone has any insight into this. Not driven the car for couple weeks as I've had a few exams, last couple days on startup the exhaust would be as normal but every couple seconds would pause and continue. So when the smoke is coming out on cold start, on the pause the smoke would stop for a split second ...:

Has never happened before, the car is a e92 n55 335i..
I have a video, but can't seem to upload it...
Totally off topic as I dont know jack about the inner runnings of a car but EXAMS? A student with a 335!!

All I had was a Peugeot 106 in gangster Firedance Orange!! LOL
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      05-24-2017, 06:07 AM   #6
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If it's a stock car (without an altered flash) then something looks not quite right on the timing at idle, possibly idle when cold.
It's worth seeing if you can get codes off it.
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      05-24-2017, 07:33 AM   #7
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Quote:
Originally Posted by AWSAWS View Post
If it's a stock car (without an altered flash) then something looks not quite right on the timing at idle, possibly idle when cold.
It's worth seeing if you can get codes off it.
Does a ppk from bmw count as a stock car ?
What's the best code reader to use..
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