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Model specific boards => Golf mk2 => Topic started by: monzablue16v on 01 March 2005, 23:03

Title: misfire from cold and tapping when cold til engine warmed up
Post by: monzablue16v on 01 March 2005, 23:03: hi guys
Little question, mk2 gti 1.8 16v golf got in to start today and started on the button but... it misfires for about 5-10 seconds and takes a light touch on the throttle to idle sweetly once going it sits at 950rpm-1000rpm and behaves itself afterwards is it an early sign that I should be changing something? it also taps when cold but this seems to go once warm new careful golf owner! zooooom
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: free on 02 March 2005, 00:17: sounds like a good service might help :wink:
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: VR6_ROB on 02 March 2005, 08:23: my car does that now and again but lasts about 2-3minutes
then it sorts itself out and wont do it again for a few weeks
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: Judderi on 02 March 2005, 08:24: Sounds exacltly like mine. I think the tapping noise is the hydraulic tappets. As for the misfire i dont know, mine does this too but doesent realy bother me as it stops when you press the acelerator. Just like yours mine drives great once going.
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: monzablue16v on 02 March 2005, 11:00: I just did an oil change on car at the weekend flushed using engine flush then used good mineral oil and some Lucas oil stabiliser, new sump plug and copper washer from VW tappet noise was there before and is still there thought that might have cured it, definitley runs better now, spark plugs are the scariest thing to change cos if i cock it up i got to take so much stuff off to get at it! seems like a common thing but it sounds like it's firing on 1 cylinder and I don't like it :undecided:
Any ideas what might be a good change on the service side? dissy cap and rotor arm?
cheers guys n gals
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: Gambit on 02 March 2005, 11:30: take off the ISV and clean it out properly with thinners or petrol. these get mucked up and when cold starting in the morning they can stick a bit and not operate properly. but cures itself once they get a bit of heat into them

also, is your noise definity metallic tappet noise? i sometimes get a noise which sounds like chit chit constantly but mine is the bottom timing belt cover rubbing on the alternator pulley!!
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: monzablue16v on 02 March 2005, 11:34: yeah it sounds like tappets to me dunno much bout valvers used to have a mini which is a bit different! alternator is shafted neway water pump pulley is wonky! just waiting for a water pump pulley from VW, the guy i bought it from must have not even had a toolkit and has just not fixed stuff :angry: spanner shy monkey!!!
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: monzablue16v on 02 March 2005, 11:36: with the isv is it easily fixable or am I likely to break it! I've seen how much they are to buy and don't wnat to break it!! also do i need any parts to rebuild like gaskets or o rings?
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: Judderi on 02 March 2005, 12:39: There is not allot you can do with the isv other than soak it in brake cleaner to disolve all the gunk inside. I wouldent pay the full price for one. Have a look on ebay, theres always some going cheap.
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: monzablue16v on 02 March 2005, 12:50: I'll give it a go aand keep my eyes peeled :rolleyes: for one on ebay
cheers
scott
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: Gambit on 02 March 2005, 19:27: clean out the :-

1. ISV
2. air intake between airbox & throttle body
3. throttle body
4. Idle screw in the throttle body itself

just make sure you give the ISV a wee squirt of WD40 after cleaning out

ISV is not very easily broke so fire ahead on taking it apart. there is a pic of it circled in my gallery if you dunno where it is
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: monzablue16v on 02 March 2005, 23:33: cheers I shall have a butchers tommorow and see how much crud is in it!!
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: Gambit on 03 March 2005, 20:54: your motor is a very nice colour
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: AudiA8Quattro on 03 March 2005, 21:07: As for the tappets, there isn't alot you can do with them.
What happens is, as the miles pile on, they get clogged up with sh!t from the oil.
Apparently you can strip them down, do a search on clubgti.
Personally i would replace them for new. You will be amazed the difference it will make ?:laugh:
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: AudiA8Quattro on 03 March 2005, 21:08: Gambit, how come your alterator pulley rubs on the timing belt cover?
Surely this can't be right!
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: monzablue16v on 03 March 2005, 22:36: Quote from: Gambit on 03 March 2005, 20:54
your motor is a very nice colour
Cheers Gambit she appreciates it :smiley:? it's factory monza blue is it a rare colour as I've only seen a couple about?

Quote from: golfvr6-is-back on 03 March 2005, 21:07
As for the tappets, there isn't alot you can do with them.
What happens is, as the miles pile on, they get clogged up with sh!t from the oil.
Apparently you can strip them down, do a search on clubgti.
Personally i would replace them for new. You will be amazed the difference it will make? :laugh:

The engine was rebuilt about 36 k ago by a company called AudiGolfhits in north wales I can't even find the company, anybody any experience with them? I would have thought tappets would have been changed but assumption is the mother of all f*** ups!!!

Quote from: golfvr6-is-back on 03 March 2005, 21:08
Gambit, how come your alterator pulley rubs on the timing belt cover?
Surely this can't be right!

Your alternator must be in a different place to mine!!! Speaking of alternators mines Shafted and so is my water pump pulley becoming more unamused with car and previous owner by the minute!
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: Gambit on 04 March 2005, 09:25: Quote from: golfvr6-is-back on 03 March 2005, 21:08
Gambit, how come your alterator pulley rubs on the timing belt cover?
Surely this can't be right!

i meant the bottom pulley :)
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: Horney on 04 March 2005, 10:09: My tappets tick to. It's on my list of things to do soon. But lets face it it's not exactly urgent, the old girl just sounds like a tractor when she's cold.
Title: Re: misfire from cold and tapping when cold til engine warmed up
Post by: AudiA8Quattro on 04 March 2005, 10:42: Euro car parts do a good deal on tappets, and i can confirm that their pattern parts are of good quality, unlike some companies *cough* GSF :laugh: