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Old 04-01-2014, 11:03 AM   #1
Rs31markie
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Default Lt focus missfire first thing!

Hi, could someone tell me if this is a fault that's happened to anyone else. 07 focus zetec, 2.0 dura eng, 65k full ford service history, when started from cold it sometimes has a miss fire, it only lasts for 30secs. I was going to change the plugs as a matter of course, but thought I'd put it up on here to see if it's a common problem. The car runs fine when warm. Thanks.

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Old 04-01-2014, 02:48 PM   #2
DZFord
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Technical Contributor: For members who share their technical expertise. - Issue reason: LS Focus PCV Valve & Hose replacement, a very detailed write up with photos. 
Default Re: Lt focus missfire first thing!

Yeah this is a fairly common issue, lots of mentions of the same problem on here.

Only usually occurs on cold-starts as you mentioned and also only usually short-lasting.
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Old 04-01-2014, 11:08 PM   #3
Rs31markie
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Default Re: Lt focus missfire first thing!

Thanks for reply DZFord, is there a fix or is it just something they do?
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Old 05-01-2014, 11:55 AM   #4
DZFord
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Default Re: Lt focus missfire first thing!

Often, you just need to let them idle for a few seconds before driving off. Replacing spark plugs helped mine and it seems to rarely ever do it these days (NGK Iridium plugs_
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Old 14-01-2014, 11:11 PM   #5
Rs31markie
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Default Re: Lt focus missfire first thing!

Thanks DZFord, I've changed the plugs, and it's not done it since, even tho plugs had only done 20k. Thanks again for you're input.
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Old 16-01-2014, 10:36 AM   #6
DZFord
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Default Re: Lt focus missfire first thing!

Good to hear it helped!
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