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Author Topic: Flaminia V6 engine, single solex twin barrel carb - sparking problems  (Read 636 times)
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Senior Member
Posts: 109

« on: 14 August, 2021, 02:00:32 PM »

Hi All,
Iím having repeated problems with my engine not running properly.
Iíve had spark plugs stop working, sparks leaking through rubber plug caps and creating a tiny hole in them. Iíve replace the bad spark plugs and the rubber covers.
The engine runs great immediately afterwards but then a couple of days later, after driving the car couple of times for short distances, the engine runs badly again!

Now, in the order of the cylinder firing sequence, cylinders 3, 5 and 6 arenít firing - (see diagram attached). I can tell because the exhaust manifold branches for these cylinders arenít getting hot whilst the others are.

Iíve got:
ĎIgnition123' Electric Distributor Ignition system
Carbon core HT leads
NGK iridium spark plugs (NGK BKR6EIX 6418 Spark Plug Iridium IX)
Standard spark plug rubber caps.

The position of the cylinders not firing donít suggest a blocked carb main jet. Iíve had a problem with blocked fuel pipe and/or weak fuel pressure but Iím pretty sure that has been solved now.

Do you think its possible that 123 Ignition system, carbon core HT leads are damaging the spark plugs and rubber caps?

Any other suggestions please?

* Non-firing-Cylinders-14Aug21.pdf (353.71 KB - downloaded 44 times.)
Posts: 326

« Reply #1 on: 15 August, 2021, 05:13:47 PM »

Would it be worth changing the ignition system back to a points/condenser system  and see if that cures the problem ?
If it does you can then make the electronic ignition the culprit.

Flavia 815 Vignale
Flavia 819 Milleotto
Flavia 815 Coupe Inezione
2000HF x2
2000 Coupe
2000 Sedan x3
Current 815 Coupe Variante 1005
Senior Member
Posts: 109

« Reply #2 on: 17 August, 2021, 01:47:16 AM »

Hi Bob, Thanks for your reply. I'll try that as I've tried everything else.
I managed to get it running on all cylinders after de-carbing the plugs but it has now developed a back fire through the carb on tweaking the throttle. After checking for vacuum leaks, doing tappets, cleaning jets and checking float level its now not firing on one cylinder and still has a back fire even, though less often.
I'm wondering if the 123-Ignition electronic ignition dizzy and Bosch coil are just to strong for the plugs and/or HT leads and doing something to them that makes them stop working intermittantly and then eventually kills them?
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