I am trying to install a timing belt on an Acura Legend V6 and noticed the crankshaft pulley for the belt is half the size of the camshaft pulleys. That means for every 1 rotation of the camshafts, the crankshaft makes 2 rotations. This makes sence as it's a 4 stroke engine therefore one of the rotations is gas intake and compression and the next rotation is explosion and exhaust expulsion.
If whatever controls the spark plugs and tells them when to fire is hooked up to the crankshaft, that means you could get it off 1 turn on the crankshaft and the spark plugs would fire at TDC when the piston was done expelling exhaust and not on the compressions stroke.
If whatever controls when the spark plugs fire is hooked up to the camshaft, I don't think the problem exists because the crankshaft does not behave differently, it just pushes up and down pistons in an even pattern.
So is it possible to have it off 1 turn?
What controls the spark plugs, the Crank/CYL sensor?
If whatever controls the spark plugs and tells them when to fire is hooked up to the crankshaft, that means you could get it off 1 turn on the crankshaft and the spark plugs would fire at TDC when the piston was done expelling exhaust and not on the compressions stroke.
If whatever controls when the spark plugs fire is hooked up to the camshaft, I don't think the problem exists because the crankshaft does not behave differently, it just pushes up and down pistons in an even pattern.
So is it possible to have it off 1 turn?
What controls the spark plugs, the Crank/CYL sensor?