Mystery...

jackwilliams1 · Post by **jackwilliams1** » Thu Jul 26, 2007 10:15 pm

Hi guys, you've already humoured this newbie before but I'm stuck again:

What goes in the yellow highlighted cavity just below my boot sill?

Also, when the engine is warm and I turn it off (to collect chinese takeaway for example...) and then go to turn it on again, it doesnt start. The battery and starter motor work just fine, so my best guess is, knowing that polo's often have this type of issue, is that one or all of my HT leads needs replacing (my reasoning is that as they're say on top of the engine block, once the engine warms up, so do they, and so as a wire increases in temp, its resistance increases, and THATS why it wont start when I want it to... dont know if thats right or even of it's logical, just kinda made sense in my head!) and it starts fine cold every time.

What do you reckon?

Cheers from a Cornish 'dub GTi fan!
jx!

Redline · Post by **Redline** » Thu Jul 26, 2007 10:46 pm

I'd think the yellow highlighted area is meant to house a folding warning triangle.

General legal requirement on the continent, but not in the UK, hence UK cars not having them.

jackwilliams1 · Post by **jackwilliams1** » Thu Jul 26, 2007 11:00 pm

Ahah! I did wonder if it would be that... but then worried that it might be for the wheel brace that I'm missing...

jx!

Redline · Post by **Redline** » Thu Jul 26, 2007 11:16 pm

The standard wheel brace typically sits in the toolbox that holds the jack and other things in the spare wheel well. It's pretty small!

randy · Post by **randy** » Thu Jul 26, 2007 11:39 pm

Just taking a stab in the dark over your starting problems... have you checked the battery to see if you have a dud cell in it? Or maybe alternator?

Randy

garnier · Post by **garnier** » Fri Jul 27, 2007 1:15 am

I think faulty HT leads would manifest itself in other ways, like chugging, spluttering and lumpy idle, even more so when it's raining.

It sounds like your hot-start problem is more related to some kind of sensor. VAG COM diagnostics might be able to tell you more if you are determined to fix it yourself, but unless you are a competent mechanic I wouldn't recommend it. Just from reading this forum people seem to end up even more puzzled by what they find out fom vag com. Your best bet would be to give a mobile tune-up service a call, they'll be able to come and diagnose your fault properly.

J-GTi · Post by **J-GTi** » Fri Jul 27, 2007 11:00 am

The warm starting problem is due to a faulty "coolant temperature sensor"

Very cheap and easy to replace, Sensor is about Â£10 from VW and it'll take you about 5
minutes to sort!

jackwilliams1 · Post by **jackwilliams1** » Fri Jul 27, 2007 8:27 pm

Faulty coolant temperature sensor eh? Cheers J-GTi, I'll rock and roll over to the stealership on monday to get one. You're pretty sure that's the thing right? And how do I go about doing the old 'switcheroo' with the old sensor for new?

This forum is such an awesome resouce!

Cheers guys, go-team woo!
jx!

nrtnm · Post by **nrtnm** » Fri Jul 27, 2007 9:14 pm

I'm pretty sure the highlited area is for a fire extinguisher.

As for the sensor I have exactly the same problem. You should run vag-com to see what faults pop up, more then likely temperature sensor will be one of them.

J-GTi · Post by **J-GTi** » Fri Jul 27, 2007 9:32 pm

Yup thats deffinatly it, Just make sure you have extra engine coolant as some will run out when you change it.

I'll get a pic up later and explain how to go about it and I'll get you the part number too.

jackwilliams1 · Post by **jackwilliams1** » Sat Jul 28, 2007 7:24 pm

If you could that would be awesome, cheers buddy!
jx!

jackwilliams1 · Post by **jackwilliams1** » Sun Jul 29, 2007 4:07 pm

nrtnm, cheers for your advice, but how do I run vag-com? Will it only be dealers who have it? Is that what the socket behind my ashtray is meant for? Are a bunch of other faults that I didn's know about likely to present themselves? I'm in an awesome strange new world, stepped up from a Yaris which just plain and boring worked! But I love that my new dub GTi needs love to run sweet! Gives me something to focus my attention on!

The saga continues: all of a sudden today the polo a.k.a. The Beast started idling at about 2500rpm! It just felt as if the throttle was stuck part-way open...maybe I need to clean the throttle assembly? I overheard a bunch of people chatting about doing that in another thread...

Onelove, jx!

Ry` · Post by **Ry`** » Sun Jul 29, 2007 4:33 pm

J-GTi wrote:Yup thats deffinatly it, Just make sure you have extra engine coolant as some will run out when you change it.

I'll get a pic up later and explain how to go about it and I'll get you the part number too.

This would be great if you could do this. Mine still does it even after changing the spark plugs and HT leads

cheers

jackwilliams1 · Post by **jackwilliams1** » Thu Aug 09, 2007 9:14 pm

Turns out you were bang on the mark! VAG-COM cable arrived so I hooked up and tuned in and viola: fault 16500...coolant temperature sensor (G62) implausible signal! So I'll holler at my dealership and ask them nicely to sort me out with a fresh sensor...any progress on that sensor replacement walkthrough?...

Also VAG-COM told me I have faults 17978 and 18006, and I havent got a clue what they are!

AND when I select 'readiness', Oxygen sensor, Secondary air injection and Catalytic converter all read 'Failed or incomplete'

These thing make me worry...

Please UK-POLOS.NET, do your thang!

jx!

ps just got some new raybans, might stick in a bora sunglasses holder...

UK-POLOS.NET - THE VW Polo Forum

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