Engine Clattering - Fuel

Engine, Exhaust, Drivetrain, ECU Issues and Fixes
Giz9
Posts: 714
Joined: Mon Apr 14, 2014 3:00 pm

Re: Engine Clattering - Fuel

Post by Giz9 » Mon Nov 13, 2017 11:26 am

coulsda2 wrote:
Sun Nov 12, 2017 8:01 am
Very interested how this link progresses because I've had the same for about 6 months - or had...
Mine happens when I accelerate very gently and the revs run around 2000rpm. Reminds me of the old fashioned "pinking" noise from my old petrol cars when the timing was too advanced.
Of course, it happens when I'm in the car with my wife and doesn't tend to happen with others. It wasn't all the time - some days seemed worse than others.

I took it in to the Garage and as you could expect...all the way to the garage I couldn't replicate the problem. A mechanic sat in the passenger seat and whilst I could faintly hear the noise it was very backgroundish and the mechanic was not so sure.

Two points you might be interested in....The mechanic thought it would probably be down to ....(now here I apologise because the mechanic spoke German with some English and I speak English but can point in German)....he explained that there is a feedback from the exhaust gas to the ???? as it can run too hot and the feedback cools. He believed that the problem could lie there.

Because I was so frustrated and they had still not heard the problem the next step is for a day drive by the mechanic under normal use while i sit in a loaner.

Since, the temperature has dropped to around 3 to 5 degrees the noise is gone...it may be a temperature related issue?
I certainly think it engine management-related and therefore could come and go at different engine temperatures, different outside air temperatures and possibly different fuel. I am just glad it has gone! Hoping it doesn't come back but maybe it is not a serious problem if it is engine-management related and only occurs under special circumstances. If it was a pure mechanical problem, it wouldn't go away.
Diesel S - Dark Blue/Luxor Beige. http://www.porsche-code.com/PFRFZG58
Deposit 9/4/2014
Locked down 6/3/2015
Built 12/5/2015. Delivered 2/6/2015


coulsda2
Posts: 46
Joined: Sat Jan 02, 2016 9:09 pm

Re: Engine Clattering - Fuel

Post by coulsda2 » Tue Mar 06, 2018 7:13 pm

Mine does it when the weather is warm. It was so bad I was convinced it was mechanical. As soon as the weather changed to cold the noise disappeared, we wait until it returns but already they believe it’s to do with exhaust gas return being faulty


Giz9
Posts: 714
Joined: Mon Apr 14, 2014 3:00 pm

Re: Engine Clattering - Fuel

Post by Giz9 » Wed Mar 07, 2018 10:24 am

coulsda2 wrote:
Tue Mar 06, 2018 7:13 pm
Mine does it when the weather is warm. It was so bad I was convinced it was mechanical. As soon as the weather changed to cold the noise disappeared, we wait until it returns but already they believe it’s to do with exhaust gas return being faulty
Thanks for that. I wondered if it was to do with cold and will see if mine returns when it warms up. Nice to know that they might be able to do something about it too.
Diesel S - Dark Blue/Luxor Beige. http://www.porsche-code.com/PFRFZG58
Deposit 9/4/2014
Locked down 6/3/2015
Built 12/5/2015. Delivered 2/6/2015


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daftpuddin
Posts: 28
Joined: Tue Dec 08, 2015 11:51 am

Re: Engine Clattering - Fuel

Post by daftpuddin » Fri May 04, 2018 5:26 am

Just a quick update. The mild engine 'rattle' noise has completely gone. Just started using branded fuel, not supermarket rubbish.

Occassional fill up with premium fuel such as Ultimate, but any ordinary branded fuel (my nearest is Gulf from a Co-op convenie) seems just as good. Also had first service, don't know if this made much difference, there wasn't a problem by then.

Engine is super smooth now.


mark-yorkshire
Posts: 2419
Joined: Thu Jan 23, 2014 8:34 pm

Re: Engine Clattering - Fuel

Post by mark-yorkshire » Fri May 04, 2018 7:02 am

daftpuddin wrote:
Fri May 04, 2018 5:26 am
Just a quick update. The mild engine 'rattle' noise has completely gone. Just started using branded fuel, not supermarket rubbish.

Occassional fill up with premium fuel such as Ultimate, but any ordinary branded fuel (my nearest is Gulf from a Co-op convenie) seems just as good. Also had first service, don't know if this made much difference, there wasn't a problem by then.

Engine is super smooth now.
I have always used Shell normal diesel for all three of My Macans which have always run quietly. My last Macan at 23000 miles was still as smooth as when new.
2018. Macan SD Volcano Grey
2015 . Macan SD . Agate grey. Sold at 23,000 miles.
2014. Macan SD . Jet black. Sold at 8,000 miles.
2012. 981 Boxster PDK . Agate grey. Sold
2010. 987.2 Cayman PDK. Aqua blue. Sold.


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