MK5 Golf GTI

All Things Mk5 => Mk5 General Area => Topic started by: edition_30 on June 08, 2011, 07:08:49 pm

Title: Slight Misfire On Idle
Post by: edition_30 on June 08, 2011, 07:08:49 pm: Since i have owned the car i have noticed a slight misfire on idle. Does not effect performance but just wondering what could be causing the issue.

Plugs were changed as part of 4th year service
Title: Re: Slight Misfire On Idle
Post by: bacillus on June 08, 2011, 07:15:37 pm: coil packs??

Get it logged with vcds to show what cylinder misfire is occuring and swap the coil pack from a cylinder that's not misfiring. If the misfire follows the "bad"coil pack then buy a new one.
Title: Re: Slight Misfire On Idle
Post by: edition_30 on June 08, 2011, 10:32:30 pm: Thanks buddy
Title: Re: Slight Misfire On Idle
Post by: xxx_mojo_xxx on August 15, 2011, 10:23:49 pm: Quote from: bacillus on June 08, 2011, 07:15:37 pm
coil packs??

Get it logged with vcds to show what cylinder misfire is occuring and swap the coil pack from a cylinder that's not misfiring. If the misfire follows the "bad"coil pack then buy a new one.

If it's not the coil pack...then what else should one check?
Title: Re: Slight Misfire On Idle
Post by: bacillus on August 15, 2011, 10:48:10 pm: Quote from: xxx_mojo_xxx on August 15, 2011, 10:23:49 pm
If it's not the coil pack...then what else should one check?

Could be a faulty injector if plugs and coil packs are ok.
Title: Re: Slight Misfire On Idle
Post by: chowgar on August 16, 2011, 11:48:31 am: will a misfire always throw up a light on the dash?

I seem to have a slight stutter sometimes on acceleration, coilpacks have just been replaced under recall and I see from the log book the plugs could do with being replaced.... but other than some slight stuttering there are no warning lights on the dash?

this seems to be a common occurance at the moment alot with those that have just had their CP's replaced under recall???
Title: Re: Slight Misfire On Idle
Post by: Tfsi_Mike on August 16, 2011, 12:15:55 pm: I've just changed all 4 coilpacks as I had a misfire on cyl3

Still spluttered a bit under load on the way home from work last night
and hiccup'd on idle still.

Plugs were only changed a few thousand miles ago. It's chewing through plugs!
Ordering another set today, bloody thing :fighting:

Cyl4 continues to get alot of moisture in the 'coilpack hole'
Title: Re: Slight Misfire On Idle
Post by: WILLZIE on August 16, 2011, 12:22:52 pm: Quote from: chowgar on August 16, 2011, 11:48:31 am
will a misfire always throw up a light on the dash?

I seem to have a slight stutter sometimes on acceleration, coilpacks have just been replaced under recall and I see from the log book the plugs could do with being replaced.... but other than some slight stuttering there are no warning lights on the dash?

this seems to be a common occurance at the moment alot with those that have just had their CP's replaced under recall???

CP Recall???
Title: Re: Slight Misfire On Idle
Post by: Tfsi_Mike on August 16, 2011, 12:28:17 pm: Quote from: WILLZIE on August 16, 2011, 12:22:52 pm
Quote from: chowgar on August 16, 2011, 11:48:31 am
will a misfire always throw up a light on the dash?

I seem to have a slight stutter sometimes on acceleration, coilpacks have just been replaced under recall and I see from the log book the plugs could do with being replaced.... but other than some slight stuttering there are no warning lights on the dash?

this seems to be a common occurance at the moment alot with those that have just had their CP's replaced under recall???
l
CP Recall???

Revised coilpacks ending 'F' I think
Title: Re: Slight Misfire On Idle
Post by: FamilyDub on August 16, 2011, 02:16:43 pm: Quote from: xxx_mojo_xxx on August 15, 2011, 10:23:49 pm
If it's not the coil pack...then what else should one check?

There are more things that could cause it and i've had all of these :confused:

* Do you still have a diaphragm-type diverter valve? Change for piston-type 'Revision D' valve, part 06H 145 710 D?
* You've changed the coils - have you changed the sparkies?
* When was the last time you gave your car an 'Italian tune up'?
* Using the correct grade of fuel? 98+ RON?
* Is it 'hunting' for revs, i.e. dropping to 600, then peaking up to 1,500-2,000 rpm? PCV might be kaput...

Hope you get it fixed.
Title: Re: Slight Misfire On Idle
Post by: Tfsi_Mike on August 16, 2011, 02:29:36 pm: Quote from: FamilyDub on August 16, 2011, 02:16:43 pm
Quote from: xxx_mojo_xxx on August 15, 2011, 10:23:49 pm
If it's not the coil pack...then what else should one check?

There are more things that could cause it and i've had all of these :confused:

* Do you still have a diaphragm-type diverter valve? Change for piston-type 'Revision D' valve, part 06H 145 710 D?
* You've changed the coils - have you changed the sparkies?
* When was the last time you gave your car an 'Italian tune up'?
* Using the correct grade of fuel? 98+ RON?
* Is it 'hunting' for revs, i.e. dropping to 600, then peaking up to 1,500-2,000 rpm? PCV might be kaput...

Hope you get it fixed.

Useful reminder of the basics thanks :happy2:

Italian tune up? lol - thrashing??
Title: Re: Slight Misfire On Idle
Post by: FamilyDub on August 16, 2011, 02:48:46 pm: Quote from: Tfsi_Mike on August 16, 2011, 02:29:36 pm
Italian tune up? lol - thrashing??

I wouldn't use the word 'thrashing'... how about... 'sustained sporty driving', as the VW sales brochures call it! :laugh:
Title: Re: Slight Misfire On Idle
Post by: Tfsi_Mike on August 16, 2011, 02:51:09 pm: Quote from: FamilyDub on August 16, 2011, 02:48:46 pm
Quote from: Tfsi_Mike on August 16, 2011, 02:29:36 pm
Italian tune up? lol - thrashing??

I wouldn't use the word 'thrashing'... how about... 'sustained sporty driving', as the VW sales brochures call it! :laugh:

Sorry, spirited driving.... :innocent:
Title: Re: Slight Misfire On Idle
Post by: FamilyDub on August 16, 2011, 05:04:37 pm: Quote from: Tfsi_Mike on August 16, 2011, 02:51:09 pm
Quote from: FamilyDub on August 16, 2011, 02:48:46 pm
Quote from: Tfsi_Mike on August 16, 2011, 02:29:36 pm
Italian tune up? lol - thrashing??

I wouldn't use the word 'thrashing'... how about... 'sustained sporty driving', as the VW sales brochures call it! :laugh:

Sorry, spirited driving.... :innocent:

That's the one. :driver: