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 Intermittent ignition cut out
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Dynorog
V4 Fanatic

United Kingdom
238 Posts

Posted - 24 Mar 2021 :  08:32:10 Show Profile Reply with Quote
Mine wasnt spot welded originally as far as I know, unless of course there had been a previous repair
Cheers

Dynorog
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melle
V4 Guru

United Kingdom
3326 Posts

Posted - 24 Mar 2021 :  10:54:52 Show Profile Reply with Quote
quote:
Originally posted by GeoffC
Just had a thought - as I have the Acuspark ignition fitted, does it actually need the braided earth wire?! Obviously with points it completes the circuit but with the electronic ignition the switching signal is just the Hall effect off the cam lobe.
I think you may be right. When I had this problem yonks ago I was still running points.

www.saabv4.com
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Dynorog
V4 Fanatic

United Kingdom
238 Posts

Posted - 24 Mar 2021 :  10:56:32 Show Profile Reply with Quote
Thinking about it , wouldnt a spot weld just vaporise the braid? Brazed may be?
Cheers

Dynorog
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GeoffC
V4 Fanatic

United Kingdom
482 Posts

Posted - 24 Mar 2021 :  16:42:44 Show Profile Reply with Quote
You could be right. I picked the spot welded info up by Googling Bosch distributors and it stated the best way to solve a failed braided wire was to fit electronic ignition. The penny then dropped that the Acuspark sensor is all sealed in the bit that replaces the points so shouldn't need earthing. Been to a funeral today but will try and get another go on the problem later in the week.
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EdinburghJoe
V4 Fan

United Kingdom
119 Posts

Posted - 24 Mar 2021 :  20:15:13 Show Profile Reply with Quote
Ive got electronic ignition and mine does still need to earth via the distributor case in the same way as points. Theres a wire going from the + on the coil (ie always on) which powers the unit, and another from the -ve side of the coil which the unit then connects to the earth in time with the cam in the same way as the old points. Unless you have a third cable from the unit going to earth, then it must be earthing through the case.
So I think your dodgy braided cable could still be an issue. Ive read this thread with interest, and Ill definitely check mine, as I have had ignition problems in the past (since I had electronic ignition).
Joe
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melle
V4 Guru

United Kingdom
3326 Posts

Posted - 24 Mar 2021 :  21:24:51 Show Profile Reply with Quote
Ah, I didn't realise there are only two wires on the aftermarket electronic ignition kits. The VAG system I use has three wires (the earth wire runs from the distributor to the amplifier module, which is then earthed to the car body).

www.saabv4.com
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GeoffC
V4 Fanatic

United Kingdom
482 Posts

Posted - 25 Mar 2021 :  17:19:24 Show Profile Reply with Quote
Ok I'm back to wanting to replace the braided earth wire!! Just been reading Acuspark's fault finding web page and it DOES say you should ensure that you have a good earth from the baseplate to the distributor body. So will try a local auto-electrician and see if they can do the replacement.
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GeoffC
V4 Fanatic

United Kingdom
482 Posts

Posted - 27 Mar 2021 :  09:50:39 Show Profile Reply with Quote
Found somebody to replace the earth wire so I have taken the distributor out and will drop it off Tuesday. Lets hope this solves the problem but I'm only 60% confident!!!
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EdinburghJoe
V4 Fan

United Kingdom
119 Posts

Posted - 27 Mar 2021 :  21:07:49 Show Profile Reply with Quote
I had a look at my distributor today, its set up similar to Geoffs, and the wire is looking a bit flakey.

Im wandering if I could slip a spade connector under the head of the screw holding the points, use a flexible wire and perhaps feed it outside along with the other two wires on my electronic ignition and earth it somewhere handy.

Does that sound sensible? Dont know if its possible yet, the idea just came to me now!

Joe.
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GeoffC
V4 Fanatic

United Kingdom
482 Posts

Posted - 29 Mar 2021 :  07:35:09 Show Profile Reply with Quote
Might be possible Joe, just have to make sure it doesn't impede the adv/retard plate from free movement.
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Derek
V4 Guru

United Kingdom
2015 Posts

Posted - 29 Mar 2021 :  12:12:45 Show Profile Reply with Quote
The braid is used by choice to allow the points plate to move back and forth under the influence of the advance/retard mechanisms with as little interference as possible. Try and use it if you can. Someone may have an old dizzy that you can salvage a good plate/braid from.
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melle
V4 Guru

United Kingdom
3326 Posts

Posted - 29 Mar 2021 :  23:21:12 Show Profile Reply with Quote
I think solder wick will do the job just fine: https://www.ebay.co.uk/itm/313440386812

www.saabv4.com
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EdinburghJoe
V4 Fan

United Kingdom
119 Posts

Posted - 30 Mar 2021 :  15:26:45 Show Profile Reply with Quote
I considered soldering (I've got a small gas 'iron' which I think would deliver enough heat, and some wire braid from fixing scalextric cars) but I was worried about possible damage to the dizzy if I heated it sufficiently to melt the solder - that sort of joint would need a lot of heat to be strong. I could dismantle it, but that would be a much bigger job. Also, I'd be concerned that, however I did it, the joint might give way at some point.

For what it's worth, I did add a fresh wire and I hope it's OK: I got a fairly standard bit of multi-strand wire, stripped all the insulation off and twisted it up a bit.
There was enough room through the rubber grommet that holds the existing wires going to the electronic ignition 'points' for this new wire to also pass through.
I connected it with a spade connector to the screw holding the 'points', and left some excess wire 'bend' between the connector and the grommet to allow for rotation, and then connected the other end to the outside of the body with another spade connector.
It looks OK: in principle the original mechanical points had one wire following the same route, the electronic breakerless 'points' have two, and now I have three.
I got as far as starting the engine, which was fine, but only time will tell...

By the way, roughly how many degrees might the base plate move? I'm guessing a lot less than 90!
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EdinburghJoe
V4 Fan

United Kingdom
119 Posts

Posted - 30 Mar 2021 :  15:28:49 Show Profile Reply with Quote
Actually, thinking about it, I could probably have just used the braid (as Melle posted) with the spade connectors method. Might have been the best of both worlds, though possibly hard to get out through the grommet.
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GeoffC
V4 Fanatic

United Kingdom
482 Posts

Posted - 01 Apr 2021 :  09:10:39 Show Profile Reply with Quote
Hope it works OK Joe. I should get my dizzy back next week as I dropped it off yesterday so will update later. Thanks for the info on a source for the braid Melle - I still think my soldering wouldn't have been up to the job otherwise I would have had a go. Annoying as I don't like waiting for other people to do what should be an easy job! In fact I can't remember the last time I had to rely on a garage to do any work on one of my Saabs and that includes the old rally car and the current 9-3x - must be getting old!!
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