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
the hall sender in the dizzy is your next port of call i'd say and general cleaning of earths
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
yeah if the hall sender is knackered then the ECU wont think the engine is turning and wont fire the coil.
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 :(.
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...
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
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?
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
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.
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.
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.
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?
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!
Quote from: goosyganger on July 20, 2009, 06:09:31 PM
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.
Nik the loom i have sent you is off a pukka working car, came out of my old G so if that doesn't solve the problem then you have another issue with the car, might be worth checking that there are no broken wires in the loom before changing it back using a multimeter and a haynes wiring diagram and pinning it back from the hall sender connector to the ECU.
scotsjohn how much did you pay for the repair? and what sort of place did you get it done at? I was born ready for bad news lol.
Yeah hopefully the loom will result in it working, otherwise I will start to investigate the ECU and try to find a way of testing it in someone elses G40.
Thanks for all the help boys
There are two plugs one for the coil, the other for the ignition end stage. They are close to each other. Did you get them mixed up ?
It was about £250 and that's going back a few years. I got it fixed by the AA who seemingly have a repair facility dedicated to ECU problems. Can't remember addresses/phone nos. but if they still run it (and I reckon it would still be profitable) it shouldn't be too hard to get their whereabouts. Only problem was they couldn't identify the cause of failure.
Have a look at this thread from Club Polo. There is a transistor in the ECU that drives the coil. This may be broken. If your injectors are working but there is no spark it may be the problem. If injectors not firing either then it is something else. I would check with another G40 ECU first to prove yours is faulty before you start messing about with it though. The fix discussed below cost 17p!
http://www.clubpolo.co.uk/forum/index.php?showtopic=110223&hl=transistor
Hi guys,
Just wanted to give another update. Today I installed the loom that I bought from 'Robin', connected it all up. I went to see if I would get a spark by touching the spark plug in the HT to the head (earth) and there was a spark, then as the second spark hit the engine fired up. I wasnt expecting a result so I didnt bother attaching the downpipe to the manifold. My girlfriend was sitting next to the front of the car in my garage and nearly hit the roof when it fired coz it was so loud! haha. I bought the old loom from someone on here and was obviously ripped off because the loom is far from working! At least its fired up now I can finish the final touches. Thanks for all your advice it was very helpful!
Nik
Good result.
so it was the loom? I think i better check mine before i start buying new parts.
Quote from: vwmk3jon on July 26, 2009, 10:11:32 PM
so it was the loom? I think i better check mine before i start buying new parts.
yeah and it seemed to have sparked up straight away. Pull yours out and test it. Im sure there must be a more suffisticated way of doing it but I jsut used a multimeter to make sure there wasnt anymore then 0.5 resistence and that it bleeped. took me a couple of hours to get through the whole loom. But worth checking. Who knows this may not be the end of my problems lol.