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Grey996
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Joined: 24 Jan 2017
Posts: 67
Location: Sheffield


PostPosted: Mon Mar 20, 2017 9:35 am    Post subject: Judder on acceleration and check engine warning light ??? Reply with quote

The car has been great over the weekend but driving in this morning something wasn't right from the off, the idle seems fine but on acceleration there's a very noticeable judder from the engine that stays through acceleration. After about five miles the 'check' engine warning light came on advising to go to the garage but then would go off again. I nursed it the last couple of miles and the light went on and off a couple of times.

I'm hoping its MAF or throttle body related and not something more serious, any ideas?

thanks

Simon
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911tom
Albert Park


Joined: 22 May 2012
Posts: 1573
Location: Buckinghamshire


PostPosted: Mon Mar 20, 2017 9:40 am    Post subject: Reply with quote

Sounds like coil packs again. Get it plugged in. Unlikely to be anything serious!
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996lee
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Joined: 26 Aug 2014
Posts: 629
Location: South Wales/Nottingham


PostPosted: Mon Mar 20, 2017 10:23 am    Post subject: Reply with quote

sounds the exact same as when my coil packs gave up the ghost
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seeforez
Barcelona


Joined: 10 Jan 2016
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PostPosted: Mon Mar 20, 2017 10:44 am    Post subject: Reply with quote

yes damp or failing coil packs would be my first check
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Grey996
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Joined: 24 Jan 2017
Posts: 67
Location: Sheffield


PostPosted: Mon Mar 20, 2017 12:36 pm    Post subject: Reply with quote

thanks guys, I know they need doing as some are cracked but I was hoping they'd last until I planned to take the bumper off and replace the mufflers after summer. It has been very wet here over the weekend so that's probably hastened things.

Hey ho I suppose I'll just have to bring everything forward.

As far a driving it goes, am I ok, I suppose I'll loose a cylinder at a time but should get home, fingers crossed!!
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Grey996
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Joined: 24 Jan 2017
Posts: 67
Location: Sheffield


PostPosted: Mon Mar 20, 2017 3:43 pm    Post subject: Reply with quote

Drove it this afternoon and no problems at all so I assume they've dried out.

Best get some new ones bought though.
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911tom
Albert Park


Joined: 22 May 2012
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Location: Buckinghamshire


PostPosted: Mon Mar 20, 2017 3:52 pm    Post subject: Reply with quote

Yes most likely. Especially as you appear to know they are cracked. I'd get it done ASAP before they fail completely.
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Demort
Paul Ricard


Joined: 21 Mar 2015
Posts: 3256
Location: Sussex


PostPosted: Mon Mar 20, 2017 8:50 pm    Post subject: Reply with quote

Cracked coils will misfire when wet .. water shorts them out , left to dry and they will be fine until they get wet again .

Either replace or only drive when its dry Very Happy
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cheshire911
Paul Ricard


Joined: 10 Jun 2012
Posts: 3374



PostPosted: Mon Mar 20, 2017 8:56 pm    Post subject: Reply with quote

I'd recommend changing the full set of coil packs if you are going to do them.
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