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Model specific boards => Golf mk4 => Topic started by: rsgolf on 30 March 2012, 17:10

Title: misfire problem
Post by: rsgolf on 30 March 2012, 17:10

i have a 2.0 8v gti apk engine on a w plate.i have changed the coil leads and plugs was running fine for over 30 mins at work and never missed a beat.on the way home it started to misfire now and again when i got home it was worse.i have had it on the reader at work and no faults stored.any advise is much appreciated as i dont want to throw any more money at it without curing the fault.thanks guys

Title: Re: misfire problem
Post by: richw911 on 30 March 2012, 18:16

Are the plugs the correct ones for your engine? Are all the leads fully pushed home?

Title: Re: misfire problem
Post by: rsgolf on 30 March 2012, 18:22

yes to both doubled checked them.been reading different posts saying that it could be a lambda sensor or a maf.now unsure what to do.

Title: Re: misfire problem
Post by: richw911 on 30 March 2012, 18:24

Could be the MAF and it wont always show a code - try unplugging it and see if it runs better. Could  also be the coil unit that the 2.0 8v engines have.

Title: Re: misfire problem
Post by: rsgolf on 30 March 2012, 18:40

i disconnected the maf and didn't seem to make a difference.i replaced the coil,plugs and leads and was fine till it warmed up and misfire came back.

Title: Re: misfire problem
Post by: DubAndDubber on 30 March 2012, 18:52

Could possibly be the CAT

Title: Re: misfire problem
Post by: rsgolf on 31 March 2012, 14:08

had the car out today and misfire only happens when car is warm any ideas what it could be causing this.thanks

Title: Re: misfire problem
Post by: richw911 on 31 March 2012, 15:37

Quote from: rsgolf on 31 March 2012, 14:08

had the car out today and misfire only happens when car is warm any ideas what it could be causing this.thanks

Temp sender?  :undecided:

Title: Re: misfire problem
Post by: rsgolf on 31 March 2012, 17:40

car is running rich.would a temp sensor cause this and the misfire

Title: Re: misfire problem
Post by: richw911 on 31 March 2012, 18:01

Quote from: rsgolf on 31 March 2012, 17:40

car is running rich.would a temp sensor cause this and the misfire

Could well do http://www.golfgtiforum.co.uk/index.php?topic=88088.0

It usually throws a code  :undecided:

Title: Re: misfire problem
Post by: DubAndDubber on 31 March 2012, 18:03

Quote from: rsgolf on 31 March 2012, 14:08

had the car out today and misfire only happens when car is warm any ideas what it could be causing this.thanks

COULD POSSIBLY BE THE CAT!