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Fiesta Jerks When Cold/first Started


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#1 scousa

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Posted 23 April 2013 - 06:50 AM

I have a 2009 Fiesta zetec s with 80k on the clock, when i got the car i noticed when started after its been sat for a few hours it jerks under acceleration for a few seconds however it runs perfectly immediately afterwards. The only other thing i have noticed if a slight burning smell after a long drive, which i presume is old oil on the engine because someone didn't push the dipstick all the way in.

 

I thought it could be spark plugs or ignition leads so I've replaced both of these however i still have the problem.

 

Has anyone else experienced this problem of know what it could be? 



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#2 DanGersFord

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Posted 23 April 2013 - 07:52 AM

Hi id change the plugs and leads first if not you're probably looking at a coil pack. I would recommend taking it to someone with an obd reader who should be able to tell you exactly what it is causing the fault.

#3 DanGersFord

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Posted 23 April 2013 - 07:52 AM

Certainly sounds like its misfiring on one of the cylinders

#4 scousa

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Posted 23 April 2013 - 11:32 AM

Cheers for the reply, I've already changed the plugs and leads, also there is no other noticeable effects, no loss of power mpg is around 37 and idles fine



#5 experiax10

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Posted 23 April 2013 - 09:04 PM

Mines a 56 plate and was doing the same especially in the cold weather. Had it serviced last month( oil, oil filter, air filter) ford value service £115 which includes 12 month breakdown cover. It's been running perfect since :)

#6 scousa

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Posted 24 April 2013 - 07:04 PM

Hmm I might give it a full service at the weekend then since I've got the parts sat here

#7 DanGersFord

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Posted 24 April 2013 - 07:08 PM

Certainly worth trying a service :) wont do it any harm atleast. Like I said my mk6 was the same itd run quite rough when it was cold then once it had heated up it was absolutely fine and it was a faulty coil pack

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