Help - 308GT4 one bank down - new coils needed?

Hope someone may be able to shed some light on this

1974 308GT4 - Dual Distributor. Euro RHD.

Started off as a slight misfire - suspected muck in carbs - found leak in inlet manifold. Carbs all cleaned / new gaskets etc.

Found ignition leads resistance all over the place (including open circuit) - replaced.

Can get one bank (rear) working if hold foot on accelerator, but front isn't firing - exhaust pipe from bank is cold.

Dropped the coils down this afternoon, found the wiring to the ballast resistors (square blocks) hanging by a thread. The green terminal is OK, but the brown isn't. The other coil only has 1 wire going to the equivilent resistor. This seems correct according to the wiring diagram, but is it??

Any suggestions on a suitable replacment coils if these are on the way out?

I will redo the dodgy wiring tomorrow, and see what happens.

Thanks

Nigel.
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Hi Peter

Thanks for the info regarding the wire colours. Will check it all through today after redoing the terminals, and checking the resistances.

Do the bosch blue coils with the built in ballast resistance work OK in these cars? Just think might give a bit more spark.

Although it seems there are blue coils and blue coils.....

http://www.ratwell.com/technical/BlueCoil.html

Thanks

Nigel.

 

Thanks for that.

I redid the wiring today. The terminals on the marelli resistors are a bit 'wobbly', so I tried fitting 2 bosch black coils I had ( 4 ohms, 11K) without using the resistor and starting much better on the bank that runs (rear), but still no joy on the front bank.

I have removed both dizzy's and checked the operation of the points, the R2 switch is working, and the wiring to the coil. Shame you cannot swop the caps and leads from front to rear as the wiring is mirrored (or have I made the leads up wrong?)

I will get a pair of the blue coils as they are easy to source.

Next thing to try is to turn the dizzy by hand with the ignition on, and see if the plugs spark.

Also am I right in thinking No 1 cylinder is rear bank timing belt end, and 5 is front bank Dizzy end?

Thanks

Nigel.

 

* UPDATE *

Thanks to everyone for their help so far.

I have fitted 2 new bosch blue coils, and have checked the dizzy by rotating by hand = nice spark on all four in the correct sequence.

Bit more persaverance and I had it idling of sorts at 1100 rpm with a tiny bit of throttle, but the front bank is still nearly cold, and the middle two carb throats were spitting unburnt petrol. I had it running for 3 or 4 minutes like this to try and 'dry out' the cylinders and plugs.#

The engine was putting out lots of smoke - bluey grey, and now see that the carbs are leaking around their base gaskets quite badly.

When I cleaned the carbs, I just took the all jets out and the needle screws and cleaned with carb cleaner. I wonder if I need to reseat / seal all the lead plugs. It is also damp with fuel around the air corrector jets - normal???
New gaskets were used on the top cover and choke cover, and new solid bases and accelerator pumps and fuel filters. I checked the floats heights, and did NOT change the needle valve.

We are getting there.... any more ideas

 

Looks like this could be a solution - reseating the lead plugs?

Before I cleaned the carbs, there was a lot of residue around some of the plugs


http://www.ferrarichat.com/forum/showthread.php?t=35524&highlight=carb+leaking