GolfGTIforum.co.uk

Model specific boards => Golf mk1 => Topic started by: Justins145bhpMK1 on 08 October 2003, 14:27

Title: Why Hunting???
Post by: Justins145bhpMK1 on 08 October 2003, 14:27

Hi all,

Need some help. My Mk1 is running very unevenly, its hunting something cronic when cold, so much so that the dash is shaking loose. On start up it sits at 1000rpm then drops to about 4-500 on tickover. Gets better when warm but still very lumpy accelarating unless you floor it.. which I usually do. It nearly stalled today at lunch at the traffic lights. Any ideas, suggestions, things to check etc....cheers

Title: Re:Why Hunting???
Post by: richandhazel on 08 October 2003, 15:13

Vacuum leak?

Title: Re:Why Hunting???
Post by: Justins145bhpMK1 on 08 October 2003, 15:22

Hoovers working fine, hehehehehee

What am I looking at when checking vacuum pipes rich, are ther many of them???

Title: Re:Why Hunting???
Post by: richandhazel on 08 October 2003, 17:38

Basically check every pipe beween the air filter and inlet manifold and all the pipes coming from the inlet manifold......in fact any pipe that isn't part of the cooling system.  
Try bending them to see if any are split you may be suprised what you'll find, although you haven't long taken delivery of this engine from TSR have you?

Title: Re:Why Hunting???
Post by: Justins145bhpMK1 on 09 October 2003, 14:34

Cool ill try that then, you never know!!!

Engines only done 60k but ts been in the car for a few years now.

heers Rich

Title: Re:Why Hunting???
Post by: Justins145bhpMK1 on 13 October 2003, 09:44

Right, looked to vacuum leaks to no avail, tried upping the idle a little and that doesnt help.

I have also noticed when you rev the engine and come of the gas to drops right down to almost 0 revs and then seems to recover. Maybe airflow meter???? help!!!!!

Title: Re:Why Hunting???
Post by: markconlon on 13 October 2003, 15:42

Check your HT leads, if one is on its way out it could give you these symptoms

Title: Re:Why Hunting???
Post by: Justins145bhpMK1 on 17 October 2003, 12:46

Checked HT leads, still no better??? help!!!!!!!

Title: Re:Why Hunting???
Post by: golfvr6 on 18 October 2003, 00:14

Do you have an idle stabilisation valve on your car?

Title: Re:Why Hunting???
Post by: Justins145bhpMK1 on 20 October 2003, 11:11

Dont know VR6??? where would I find it???????

Title: Re:Why Hunting???
Post by: richandhazel on 20 October 2003, 17:49

I don't think you will have the ISV. Isn't yours an 8V k-jet thats been bored out and race tuned?

The ISV is fitted to the digifant and 16V engines.

Title: Re:Why Hunting???
Post by: VWnut on 20 October 2003, 18:28

On my mk1 cabrio it is the small plastic box to the left of the engine (looking in from the front). It'll have two vacuum hoses going into it.
When your engine "hunts" the idle valve should be clicking in time with the fluctuating revs.

Title: Re:Why Hunting???
Post by: essex_lad on 05 November 2003, 11:29

Whoah there lads before you change everything on the engine.

Get the mixture checked and adjusted, mine was running way too rich when I got it and caused exactly the symptoms you describe. Lumpy idling and everytime I dipped the clutch as I came up to a set of lights the rpm's would dive, almost stall then recover !