Intermittent electrical problem GTC

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Intermittent electrical problem GTC

Post by scimjim » Tue Sep 04, 2018 9:12 am

philipmasonfrance wrote:
Tue Sep 04, 2018 6:33 am
scimjim wrote:
Mon Sep 03, 2018 4:54 pm
philipmasonfrance wrote:
Mon Sep 03, 2018 2:17 pm
"Pretentious, moi?" for those who remember the Muppet Show!
I remember it from Fawlty Towers, not the Muppet show? :D
Definitely the Muppet Show - Miss Piggy. Of course, Basil may have borrowed it - "exactement"!
Much googling later and we may both be wrong, it may have first been published in a “Peanuts” cartoon strip (I can’t find it to verify though) :D

Lucy walks up to Schroeder who is busy playing his piano and completely ignores her.

She sits there for a couple of frames before becoming exasperated and tells him that he is pretentious.

The last frame Lucy has walked off and Schroeder looks up from his piano for the first time and says.......


Jim King

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Intermittent electrical problem GTC

Post by philipmasonfrance » Tue Sep 04, 2018 10:53 am

Jim, You OBVIOUSLY haven't got much on at the moment ... !



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Intermittent electrical problem GTC

Post by philipmasonfrance » Tue Sep 04, 2018 5:34 pm

Still thinking this problem over, and I see that Eric 2205 has a similar (related?) problem on his car. Would a crusty yellow/white wire between the starter and coil, making intermittent contact, also cause the coil to overheat? Which would then cause the engine to cut out?



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Intermittent electrical problem GTC

Post by philhoward » Tue Sep 04, 2018 6:00 pm

If it’s an overheating coil, then cooling it down will generally make it work again - whilst time will do this, try rapid cooling by spraying it with electrical contact cleaner. This should drop it within seconds.


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Intermittent electrical problem GTC

Post by scimjim » Tue Sep 04, 2018 6:02 pm

philipmasonfrance wrote:
Tue Sep 04, 2018 5:34 pm
Still thinking this problem over, and I see that Eric 2205 has a similar (related?) problem on his car. Would a crusty yellow/white wire between the starter and coil, making intermittent contact, also cause the coil to overheat? Which would then cause the engine to cut out?
No, because during normal running the coil isn’t supplied via the yellow/white from the starter - but via the ballast wire.


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Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), Sabre/MX5 auto (The Flying Broomstick),
1300 SS1 (Number One) & Sarah's coupe.
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Intermittent electrical problem GTC

Post by French Coupé » Tue Sep 04, 2018 6:20 pm

Me thinks you're overthinking here! When we (for those who don't know, Phil is my Dad, hence the "we"! :D ) hotwired the coil, the normal feed to the coil was disconnected, which takes the yellow and white wire from the starter out of the equation. After the engine dies, substituting the coil with 2 other coils (one old but working, one brand new and known to be good) makes no difference, so the coil isn't the problem. Unless we have 2 duff coils which overheat as soon as you show them a live wire! :lol:
The ignition module and associated loom have been changed for brand new ones. Which leaves the trigger in the distributor which a) has a connector which has melted; b) has brittle wiring; c) moves about a lot and looks as if it may be touching the vanes on the distributor shaft. For me, that's the prime suspect.

And more importantly, I've definitely heard "Pretentious, moi?" in Fawlty Towers! :lol:


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Intermittent electrical problem GTC

Post by philipmasonfrance » Wed Sep 05, 2018 7:29 am

So next question - does anyone have a known good distributor out there? I rang QRG and Nigel has nothing at the moment which doesn't need rebuilding. Time is of the essence as we have the South of France Scimitar Sortie in 3 weeks - and I need to have the GTC in reliable running order by then. Or else I'll be taking the BRM or borrowing James's MGB GT!



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Intermittent electrical problem GTC

Post by DARK STAR » Wed Sep 05, 2018 8:38 am

Erik Hofman ?
erik@scimitardemon.nl


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Intermittent electrical problem GTC

Post by French Coupé » Wed Sep 05, 2018 10:24 am

philipmasonfrance wrote:
Wed Sep 05, 2018 7:29 am
So next question - does anyone have a known good distributor out there?
Or is a replacement trigger and its small loom available new from somewhere? I've looked on Burton's website but couldn't see anything.


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Post by DARK STAR » Wed Sep 05, 2018 10:58 am

Is there a part number visible?
Just type that in a search and you will find.
Otherwise the Bosch site is comprehensive but not very comprehensible ...


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Intermittent electrical problem GTC

Post by philipmasonfrance » Wed Sep 05, 2018 11:17 am

We are delving in further tomorrow morning. Run her first until she cuts out, then try to bridge the yellow/white wire to the starter motor. Thinks: Or are we wasting our time, and should we go straight for bonnet off (easier access) and get the trigger unit out of the distributor? Watch this space.



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Intermittent electrical problem GTC

Post by philipmasonfrance » Thu Sep 06, 2018 5:11 pm

Latest. We're not at all happy with the trigger unit. As I said earlier, the rotor is definitely rubbing against the stator. Surely that can't be right - or can it? Shouldn't it just move past the stator and cut the magnetic field? When we tried to dismantle the trigger unit a tiny buffer detached itself from under the bottom plate. I would think it is there to keep the plate angled back and so maintain the gap between the rotor/stator. We couldn't get the trigger unit off as it is held very tightly in by a roll-pin down the shaft. So, all in all, not a very satisfactory session. Can anyone confirm that the shouldn't be contact between the rotor/stator please?
Second question. My distributor has a cap held on by two screws - not clips. Does this mean it has the star drive to the oil pump rather than the Allen key drive?



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Intermittent electrical problem GTC

Post by philhoward » Thu Sep 06, 2018 5:42 pm

There shouldn’t be contact between the fixed and moving parts.


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Post by DARK STAR » Thu Sep 06, 2018 5:58 pm

Star drive? That's a new one on me.
My dizzy cap is held on with screws too and the engine has the usual pencil drive.
I think even the 2,9 has pencil drive but no-one has ever confirmed this.


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Post by philipmasonfrance » Thu Sep 06, 2018 6:26 pm

Chris. Ah yes. I seem to remember that gave you some problems ...... I didn't equate "pencil drive" with "Allen key" drive. Well that's good to know if I take the plunge and go for a new/recon unit.
philhoward wrote:
Thu Sep 06, 2018 5:42 pm
There shouldn’t be contact between the fixed and moving parts.
Thanks, Phil. You've confirmed what I thought.



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