MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: mk4gti-t on December 16, 2014, 10:10:05 am

Title: Tick over misfire?
Post by: mk4gti-t on December 16, 2014, 10:10:05 am
When at a standstill in N my 2005 gti dsg will 'pop' occasionally while ticking over. If I knock it into D with my foot on the brake it ticks over fine..... Any ideas? Checked the usual pcv and all seems OK?
Title: Re: Tick over misfire?
Post by: john87 on December 16, 2014, 12:17:30 pm
possibly spark plug(s) need cleaned/replaced?

I would have said coil pack is maybe on its way out, but these usually show a misfire under load, as opposed to when idling.

A scan with VCDS may highlight a misfire
Title: Re: Tick over misfire?
Post by: Carl123 on December 16, 2014, 02:03:59 pm
Had mine scanned yesterday I have misfire on cylinder 2 on idle but when under load etc it's fine misfire disappears gonna change plugs before coil pack!
Title: Re: Tick over misfire?
Post by: GrayMK5GTI on December 16, 2014, 06:46:17 pm
Very common on these. Either dirty valves & intake tract or an injector failing  :sad1:
Title: Re: Tick over misfire?
Post by: mk4gti-t on December 17, 2014, 07:46:04 am
Very common on these. Either dirty valves & intake tract or an injector failing  :sad1:

Whats the best way of cleaning the intake system and valves? Are we talking a head off job?  :sad1:
Title: Re: Tick over misfire?
Post by: GrayMK5GTI on December 17, 2014, 07:47:40 am
Very common on these. Either dirty valves & intake tract or an injector failing  :sad1:

Whats the best way of cleaning the intake system and valves? Are we talking a head off job?  :sad1:

Inlet manifold off and manual cleaning. Plenty of DIY guides on other forums. It takes a long time as the carbon is hard baked on
Title: Re: Tick over misfire?
Post by: mk4gti-t on December 17, 2014, 08:01:43 am
Thanks mate, gives me something to do over the holidays  :happy2:
Title: Re: Tick over misfire?
Post by: r5gtt on January 19, 2015, 01:37:54 pm
Idle control valve was faulty on the one I was buying from a garage and they had already diagnosed the fault to the idle control valve which now been replaced and idling fine. Something to thing about along with plugs coils packs etc.