Explosines Motor Beetle 69

Friendly greetings: I am currently restoring the 1969 beetle of my grandfather, with 1600 engine, electricity was completely restored, a new alternator, a Solex 32 pic carburetor and electronic ignition system was bought. I was walking a few days to try it and had a pounding in the engine according to my opinion were the puffs of the valves and I would only solve it by adjusting them, but two days later I find that when I turn on and walk it it smells a lot of gasoline and there are some explosions when the engine is accelerated and smoke comes out for the escape something that does not do before. I tell a friend the situation and tells me that it could be the asparagus of the engine and that it loses strength by those accelerating it, another friend tells me that they are the spark plugs. What I want is for you to help me and guide me more or less what I can do to start early tomorrow to solve it.

Hey and what color is the smoke and explosions come out of the exhaust tube

Black, and the explosions seem to me that they are internal in the engine.

Well, K you have to do is the following, I have a vocho, you have to realize that they are the following aspects that intervene in the explosion spark plugs, carburetor, valves, you should start by making a tuned of the engine and ignition, for which you must calibrate spark plugs (better if you buy a new kit, that the problem is the problem in your vocho XK I carbure (check k your low chicleras this for 115 or so)

Thanks Panita, it will be tomorrow that I buy the spark plugs and changes. As soon as I do it, I warn you to help me with calibration, which I currently declare in learning.