my G40 wont spark

[goosyganger]

Hey guys,
I had this posted on club polo but no one could really give any answers as to why my fresh engine will not spark, or shall I say the coil pack. I changed the coil to a brand new one and there is still no spark coming out of it, I have checked it directly. I have bought a new loom that I am waiting for as the one I have has been repaird by the boggy man and has some dodgy work on it, so I thought maybe its worth getting a different one, getting it tested and repairing anything wrong with it. But I was wondering could a fault with the ECU cause a problem with the spark coming out of the coil? or does it go through a relay, in which case could there be a problem there?

Cheers

[PeteG40]

the hall sender in the dizzy is your next port of call i'd say and general cleaning of earths

[goosyganger]

Could the hall sender still affect the coil even if I dont check for a spark through the distributor? If I tested the spark through the coil. Is there still some sort of link? Before I took the old engine out everything was working so I assume they are still working now.

Thanks

[hayesey]

yeah if the hall sender is knackered then the ECU wont think the engine is turning and wont fire the coil.

[goosyganger]

I see, well that sucks. Do GSF do one? or does it have to be VW original part? I think there is a replacement FAQ on Club Polo but is it very difficult and does it take long? Or is it fairly simple?

Thanks for the advice. Hopefully it will sort it. I want the little thing back on the road .

[hayesey]

not sure if GSF sell a hall sender or not, VW certainly will.  It's not especially cheap though, I think it's something like £60, I'd try and borrow a spare dizzy off someone first to see if that is actually the problem.  Even a non-g40 dizzy would be enough to see if it gets a spark...

[goosyganger]

ouch, yeah thats not cheap. Ok that is the first thing I will do and see what happens. If it works then thanks for the advice if not then ill be back with more questions im sure lol

[vwmk3jon]

goosy, does your fire at all? My engine turns over but doesnt actually fire up. it gets like 99% of the way there but no joy.

Can i bodge a dizzy etc from a 1043cc mk3 on to check?

[goosyganger]

Hey jon, well i have wired everything up and am getting power to all the components and have checked the power and earth going to the coil and it's all there with the correct readings. I can crank the engine over on the starter motor fine,but that's all it does. Me and my friend tested the coil and no power was coming out in the form of a spark. So I got a new coil and nothing happened. So I have tracked down a new loom because the one I have is quite junk so going to neaten it up and eliminate that from the problem and will try a different dizzy to see if it is the hall sender is shagged. As heyesey has said if it's Brocken it can cause a problem with the coil. My mate have a 1l mk3 up the road so asked him if he can pop down for me to try his. He also said that a none g40 one will be enough to see if there is a spark. It's worth a go.

Will yours not run at all then, jon??

Nik 

[vwmk3jon]

Not at the moment. Its doing exactly the same as yours by the sounds of it. Need to get it running before i can get it remapped.

luckily ive got a 1l dizzy very close at hand to try. once the rains stopped (if ever), i can go out and try swapping them over.

[supercharged spaniel]

You can buy a genuine Bosch hall sender repair kit which has everything included to replace the insides of the dizzy. The only difference really from buying a Bosch replacement from vag is you'll get the dizzy case which you'll pay around 100 quid extra for. Very easy to change although you'll need a vice to clamp it while you work on it. I think Gsf charge about 50 quid for it and you'll in effect have a new dizzy.

[goosyganger]

That really sucks dude. It's a frustrating feeling isn't it! Especially when you have an eaton under the hood! My mate just finished his lupo gti eaton conversion and booooooooy does it sound good!! Can just imagine what it's like in the G! My mate is popping down tomorrow afternoon for a test so fingers crossed we will make some progress.

Actually phoned gsf on Saturday to see if they have one in stock and they do so i am sending my girlfriend over while I'm at work to pick it up. It's 58 quid but with the clip polo discount it'll be a bit cheaper. Do gsf only do a full repair kit or do u need to specify that that is what u want? Also I've been to vw a while ago when I still had my gt lump in the car and the guy quoted me 150quid for a distributor!!have a laugh!!lol. Thanks for the help spaniel.

[goosyganger]

Just a little update. I tried to start my car today with a different distributor. Put my mates 1l dizzy on my mine and there was still no spark. Also we tried my dizzy in his car and it fired up first time so the reason for no spark in my case is not the coil or dizzy. Next I have the new loom coming so hopefully this will show doom light. Is it worth getting the ecu tested?

[vwmk3jon]

frustrating yes! the noise is so addictive and certainly got quite afew looks whilst bringing it home.

ill get onto fixing it at some point. on holiday end of month so when i get back ill get onto it. Should really get the bready running too so my other half doesnt have to get up quite as early as me!

[scotsjohn]

Is it worth getting the ecu tested?

I'd say so, but after what you've tried, be prepared for bad news. I had to get an ecu repair for exact same symptoms. What was worse was the reason for the fail couldn't be identified.