Mk2 Golf GTi Issues.
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Discussion

Badgerboy

Original Poster:

1,794 posts

223 months

Tuesday 5th January 2010
quotequote all
Evening,

As this is the resident PH VW section I was hoping there may be some mechancially minded Mk2 owners here.

I said I would have a look at a friends Golf that he has been having issues with. He's not particulary car savvy but I believe I have worked out most of the issues. The only outstanding one concerns cold idle, the car likes to hunt quite a bit. Apparantly this goes away when warm.

I don't know much about Golf's to be honest but is this a ISCV issue, or a MAF problem? If its common some pointers would be quite useful. The Golf is the 8v version with the Digifant system.

(Incidently, can anyone give me the name for this part so I can get it ordered? I believe it's part of the vacuum assembly for the brake master cylinder. Well was, its had bits snapped off it!)



Thanks for bearing with me, most appreciated.

Dr G

15,994 posts

273 months

Wednesday 6th January 2010
quotequote all
Two common culprits are the ISV and temp senders (3 of them) - the temp senders can all/each cause poop idling and are on the nearside of the cylinder head down and left from the dizzy.

The idle stabilisation valve gets filthy, to clean it pop both pipes off, put your thumb over the lower hose hole and squirt a bit of meths in there. Get a mate to turn the ignition on so the ISV runs, repeat a couple of times if neccesary until the meths comes out clean. Should buzz quite agressively when the ignition is on if it's working correctly.

Dr G

15,994 posts

273 months

Wednesday 6th January 2010
quotequote all
Forgot to add - swap the connectors round on the temp sensors and see if it makes any difference, the sensors from memory are all the same. If it makes any difference doing this replace all three, they're cheap and fail regularly.

Badgerboy

Original Poster:

1,794 posts

223 months

Wednesday 6th January 2010
quotequote all
Thanks, most helpful. I'll pop this week and have a dabble.

steveo3002

11,238 posts

205 months

Thursday 7th January 2010
quotequote all
what engine /year gti

they dont all have them temp senders as described

Badgerboy

Original Poster:

1,794 posts

223 months

Thursday 7th January 2010
quotequote all
steveo3002 said:
what engine /year gti

they dont all have them temp senders as described
It's an E reg 8v PB engine I believe.

steveo3002

11,238 posts

205 months

Thursday 7th January 2010
quotequote all
right you wont have those 3 sensors on the head...thats the 16v models

have a look at this tuning guide

http://www.clubgti.com/forum/showthread.php?t=1249...

Dr G

15,994 posts

273 months

Thursday 7th January 2010
quotequote all
That would be me mostly not reading the thread then boxedin