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Model specific boards => Golf mk2 => Topic started by: Volkswagavin on 28 October 2005, 10:46

Title: Help! Intermittent fault
Post by: Volkswagavin on 28 October 2005, 10:46
My J reg 8v GTI has developed a grumble.  Occassionally when accellerating (so far happened in 1st 2nd and 3rd) the car feels as though it is being starved of fuel or air and although the revs climb as normal, my speed doesn't.  It feels almost as though it has a carb that is icing up!  Strangely, when I apply the clutch and release it whilst in the same gear, it pulls as it should.

I've recently had the plugs, leads rotor and dizzy replaced, but this didn't make a difference.  The car is run on either Optimax or Tesco super unleaded, but the problem has occured with tanks of either.

My earth strap is looking a little worse for ware although it is still hanging on - could it be that? Why would it only happen sometimes!?  For instance, it was fine on the way to work this morning, fine yesterday but Sunday it gave me a fair amount of grief....

Any ideas?
Title: Re: Help! Intermittent fault
Post by: Bazzer on 28 October 2005, 11:05
I may be reading that wrong, but if your revs are rising and your speed isn't it's your clutch mate...

Or the cable / adjuster?  :smiley:
Title: Re: Help! Intermittent fault
Post by: Mk2Kezza on 28 October 2005, 12:00
I would also say that your clutch is 'slipping'. If your engine is revving as normal and your not going anywhere (especially in lower gears) then the power isn't being transfered from the engine to the gear box. As Bazzer suggested have a look at the clutch cable first - it may be knackered, or sticking as when you dip the clutch a second time you may be loosening it and the clutch may then be biting. I'm no expert but it sounds like the clutch.
Best bet is to keep checking this forum, until a more experienced VW nut can give you a better explanation.
Good luck.
Title: Re: Help! Intermittent fault
Post by: rubjonny on 28 October 2005, 12:49
Replace the clutch cable with a new manual one before you do anything else :)
Try Halfords as last time I checked it was discontinued so they were going for a fiver each.  Ask for a manual cable for a 1.6 driver otherwise they'll try to sell you an auto adjust cable!
Title: Re: Help! Intermittent fault
Post by: rowlers on 28 October 2005, 16:53
I've had this also, but mine was only doing it in 4th and 5th! revs rising, speed not. Tried clutch cable and failed, ended up fitting new clutch @ £250, all is now fine and dandy.
Title: Re: Help! Intermittent fault
Post by: Volkswagavin on 31 October 2005, 09:29
I've just been told by a local VW nut that its a vacuum leak in the fuel injection system.  It causes a loud whining on accelleration and sporadic flat spots!  Apparently there is also a valve that gets gunked up and that doesn't help matters.

Phew!
Title: Re: Help! Intermittent fault
Post by: Judderi on 04 November 2005, 10:04
That would probably be the ISV idle stabilization valve.