gti 8v engine choke issues

[jim potter]

although people normally run at the mention of k jet .

if its setup properly , its uber reliable and gives great performance ..

kjet over digifant any day for me

[mrhutch]

reeto photos from the OP....

I am one that runs from KJet!

[sciroccotune]

reeto photos from the OP....

I am one that runs from KJet!

Right.... I'm not sure that has been done all that well! However I'm sure it has all the bits you need for a solid runner

However in the first picture you can see the square idle control valve.

I would start bay checking it have 12v with ignition on from cold and that all the pipes are air tight and free from holes

Also below the isv I think I can see an aux air valve again check the pipes for any leaks. If it's not there then this is a likely problem!

Another super important thing is that the inlet to airbox is sealed tight as the amount of air controls the fuel control flap/ meter

Out of interest once warmed up does it run correctly and what's the idle speed?

[ELVIS]

Chris appears to know about the voodoo that is k-jet

Only thing i would add is that the wiring to the box in the first pick looks like its on its last legs, although its blurred , wires look very worn/frayed. 12v/continuity check as Chris said but maybe a visual check might do it, 5 mins soldering a new plug on, even if its a plug cut off a scrap loom might be a start

[Time Bomb Tom]

Thanks for your help guys and for uploading the pics for me, I've found a split in the vacuum pipe from the dizzy I'll replace this and report back as soon as I get time and yes the van runs perfect when warmed at around 900 rpm

[Time Bomb Tom]

Hi guys it looks like my van has been wired up by An idiot, none of the sensors have a 12v supply? and the idle control valve is wired to a switch on the dashboard. Has anyone got a simplified wiring diagram or can give me any ideas I would be great full.
Thanks
Tom

[Time Bomb Tom]

The aux air valve that sits on top of the inlet manifold is only connected at that end, should the other end go in the air box? There is a hole that's been plugged up?

[ghost123uk]

Although I have owned a K-Jet'd Scirocco, I can be of little help (as mine never put a foot wrong in 5+ years of ownership). However I have a suggestion. It is hard from those pictures for anyone to work out what might not be doing what it is supposed to. How about finding a local person who has a MK1 or MK11 Golf GTi or a Scirocco GTX and comparing what they have under the bonnet to what you have. You could even find one in a scrappy and make notes and take pictures. (some Passats had the DX engine fitted too)



Aside = My current Scirocco (a "keeper") is a carb'd one but is way quicker than my old GTX, go figure...
This is why I put fancy brakes and suspension on it.

[sciroccotune]

If nothing has the correct 12v it's never going to work that well. Likely the majority for the things just need 12v live, can't remember if the aux air valve has a times live or fill time however.
Should be pipes a bit like this

ImageUploadedByTapatalk1394965624.402808.jpg

ImageUploadedByTapatalk1394965652.585472.jpg

[sciroccotune]

That's not a working engine, it's one I keep on the lock up btw

[sciroccotune]

So let lost the important sensors

WUR - 12v always
Isv - 12v at warm up?
Aux air valve - 12v at warm up?
5th injector - not needed in the country
Throttle switch- I think involved with the isv


I think you can get away with just sorting the WUR, aux air valve as early Kjet did not have an isv at all

[Time Bomb Tom]

Thanks for your help so far guys
On tracing wiring I've found a switch wired to isv, this has detached it's self from somewhere I added a 12v supply to this and when turned on it makes the tickover rise as if the choke is working I am also having trouble starting the van, it turns over for ages before it fires?

[sciroccotune]

Could be so many things. Air leaks often cause issues or it could be times wrong etc. did you fix the vac pipe to the dizzy?

[Time Bomb Tom]

Yes I have changed the vac pipes, the aux air valve that's is bolted on the inlet is not connected at one end it has a small k&n style filter on it, should this connect into the air box?

[Time Bomb Tom]

The turning over problem was just a fuse it now starts straight away, can anyone tell me if thermo sensor that controls the cold start should have a permanent live or just run when the starters cranking?