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Post by DARK STAR » Sat Aug 12, 2017 9:19 am

Thanks Erik

The garage tried changing the plugs for 'cooler' ones but that didn't help.
Fred hasn't had time yet to look at the choke, but timing seems likely anyway.
Consulting various 'authorities' on the web the recommended timing is anything from '6 - 8º' to '12 - 14º' :shock:
so if the garage looked at the wrong reference it could well be retarded.
What timing is marked for the strobe light?
And which way does one turn the distributor to advance?

The tank was nearly full of 98 octane no-ethanol when I left it.
When I went for the car it was still half full and I topped up with what the garage sold which is 95 with ethanol
Hopefully the mixture is still ok for the motor ...


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Post by Oldconn » Mon Aug 14, 2017 1:34 pm

I'm afraid petrol just won't keep nine months nowadays,Chris. I've been having similar troubles lately with my son's motorbike(hasn't been ridden for a year)and my pal's garden equipment(mower, hedge-trimmer,generator,water-pump). They were all left unused during the winter with old petrol in the tanks. They either refused to start, or would only fart and backfire. So we threw out all the old petrol, re-filled with fresh, and they all ran except for the generator,which needed a carb renewal kit, and the man in the shop advised us to use the special petrol witout Ethanol. I would empty your tank , and start again from first basics, ie: set the timing first.


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Post by DARK STAR » Mon Aug 14, 2017 6:51 pm

Oh no, not another possible cause :doh:
And another serious logistic problem - how do you get rid of 90 litres of petrol?


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Post by AJL Electronics » Mon Aug 14, 2017 7:07 pm

Once the engine is running, you re-introduce it to the tank a couple of gallons at a time until used up.


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Post by Corky » Mon Aug 14, 2017 7:23 pm

Or try a couple of bottles of Octane enhancer/booster ?


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Post by Oldconn » Mon Aug 14, 2017 8:36 pm

That's what I did with our old stuff, I mixed a few litres at a time every time I filled the Scimitar. Mind you, I only had about ten litres to use up.


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Post by tanuki » Tue Aug 15, 2017 9:57 am

Hello Chris,
Here is a summary of the symptoms that I explained over the phone, if it can be of any help to confirm a diagnostic :?

Sunday's trial:
Removed the top of the air filter to check how the card's butterflies would behave
The engine started on the second attempt and I managed to take the car out on the driveway
I let the engine turn without touching the throttle, it was turning at 2000 rpm
butterflies where half closed and if I closed them manually there was a sudden increase in the revs - as expected -
for a couple of seconds then the it would go down to ~ 1200
when releasing the butterflies, revs were back to ~2000 even once the butterflies were wide open :?
I let it warm up to 90, then the fan went ON - phew -
Pushed the throttle and the revs came down to ~1100 and steady
Shut he engine and waited 5', then it started again at the first turn of the key, revs ~1000
During the whole exercise, blue smoke was coming out on both sides near the exhaust collectors ... either exhaust fumes (?)
or burnt oil (?) since there was quite a lot of oil in the area :oops: - I hope the rocker covers have been thighted properly ... -
I would tend to say exhaust fumes since it started right away when the engine was still cold.
I took Vert Soleil for a drive up to the village for a road test ... it sounded a bit sluggish but it reached the carpark.
After 10' to get bread and cigarettes, it started right away and seemed to behave normally on the way back home :wink:

Monday's trial:
Forgot to open the bonnet before starting :oops:
I did not manage to start her ... each attempt would result in the engine starting and dying right away.
Revs would not move from 0 and if I pushed the throttle if would kill it on the spot.
After 5 or 6 attempts I noticed blue smoke coming out of the engine bay, so rushed and opened the bonnet ...
I preferred not to challenge it further, moreover the starter showed signs of getting tired - as if the battery was near to flat,
although I had charged it on the night before - Put the charger back on just in case, but it seemed to indicate that the charge was OK
decided to call it for the day ...

Tuesday's trial:
This time I opened the bonnet to check for smoke :wink:
The engine started at the first turn of the key, but still no revs ... on the second attempt I managed to bring it to ~1500 for
say 30s ... but when releasing the throttle the engine would die with a large puff of smoke coming out of the carb - I was
keeping an eye at it through the bonnet -
Did that three times, then the engine stayed steady at 800 when I released the throttle :o
Took Vert Soleil out on the driveway again and let it turn for a couple of minutes, warming up by itself ... and it remained steady
as if nothing had happened before.
Still the smoke coming out from near the collectors though ...
Looking back at the rear of the garage I noticed that my trials had left traces of black smoke - see below -
I remember my mum saying that the car blowed a huge amount of black smoke when the guy from the recovery truck
managed to start Vert Soleil after unloading it :oops:
Vert Soleil is now enjoying the sun on the driveway, and I will give it another try when it's cooled down !

On a different topics I notice that the parking brake does not work, at least not enough to keep the car standing on the
slow slope of the driveway - one more thing to check I am afraid -

That's all for now ...
BTW do you want me to try and get some of this Octane booster ?
Have you had any new from the other scimitarists near Lyon who may be able to help ?
I am staying here until Sunday morning - working from my parents' place -

Keep in touch !
Fred
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Post by scimjim » Tue Aug 15, 2017 10:17 am

Sounds like something's sticking on the carb linkage. Start with that, then basics - valve gaps, mixture and ignition timing. Obviously the leak also (exhaust or rocker covers?)


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Post by greeny » Tue Aug 15, 2017 10:33 am

scimjim wrote:
Tue Aug 15, 2017 10:17 am
Sounds like something's sticking on the carb linkage. Start with that, then basics - valve gaps, mixture and ignition timing. Obviously the leak also (exhaust or rocker covers?)
What he said


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Post by DARK STAR » Tue Aug 15, 2017 10:39 am

How difficult is it to eliminate the action(s) of the automatic choke?
Or am I barking up the wrong tree as usual?


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Post by DARK STAR » Tue Aug 15, 2017 8:17 pm

Sorry Fred, I was a bit rushed earlier.
I must thank you for your efforts, and reply to your questions.
No response from the Lyon Scimitarists which is a bit disappointing.
I imagine that octane booster for 90 litres of petrol would represent the entire stock of BestDrive and Norauto combined, let's try the carb and the timing first.
If it is the external linkage of the carb which is sticking that should be evident, but the Pierburg is very complicated and has all sorts of internal diaphragms and linkages.
It worked perfectly on the 'old' engine, I had cleaned and rebuilt it (without really understanding much about it :oops: ) but what may have happened since ...
I wonder if a 'garage at home' might be able to help -
http://www.mecanique-auto-domicile.fr
I'll e-mail them for a quote.


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Post by Oldconn » Wed Aug 16, 2017 4:47 pm

I hopeI'm not considered a Lyon Scimitarist! :D Much as I would like to help, I am more than 120 Kms away, with a sick engine myself. Chris, you have a PM.


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Post by Corky » Wed Aug 16, 2017 5:06 pm

Didn't realise you were still on the Pierburg. If you have a Weber available to try, give that a whirl.

In my limited experience of PBs, I found that tapping the large nut at the front of carb with a suitable sized hammer, unsticks the widget inside and normal service is resumed temporarily until it throws up another problem. But in all honesty, I'd just bin it and fit a Weber. I've had more than one unsuccessful attempt to make a PB work, and gave in to the inevitable Weber purchase.


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Post by philhoward » Wed Aug 16, 2017 5:19 pm

What a surprise that the only French component on your car is deciding to make its own mind up if it's going to work...

As Corky said - everyone who has had issues with the Solex Pierberg curb ends up fitting a Weber in the end.


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Post by DARK STAR » Wed Aug 16, 2017 6:54 pm

Pierburg french?
The instructions on the overhaul kit were all in italian ...
I overhauled it and it worked perfectly on the other engine.
What the garage may have done to it afterwards is another matter.

No response from anyone in Lyon apart from Fred, who is not there for long ...
And Ian, I know you are miles away otherwise I could count on you!


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