81 Spider Firing Issue
So I've been getting mixed answers as to what the proper firing order for an 81 Spider 2000 (dual Solex carbs) is. I've attached an image of my engine bay for reference. I believe, according to the manual, that the firing order on the engine is 1-3-4-2, from the front side (radiator) going back. I also believe that the order on the distributor cap should be A=1, B=2, C=3, D=4, going clockwise.
The problem is when I hook it up in this order and try to start the car I hear low popping noises in the exhaust and the car does not start. Also, when I give it a bit of gas while starting, higher popping noises come from the carb intakes and white smoke comes out of them (this I suspect is because the spark plug is sparking while the intake valve is open, but I do not know for sure).
Has anyone else had similar issues to this, or know if the firing orders are correct?
1981 Alfa Romeo Spider (Dual Solex C40 ADDHE)