Yes - at the compression stroke both valves are closed (ready to fire)
at the exhaust stroke the exhaust valve is open
You have to set your camshaft at a position of firing at number piston ,that is if the camshaft gear does not have a visible timing marks and in relationship with the crankshaft position it has to be position number one piston at TDC
the rotor should be pointing towards the number one plug position on the distributor cap, and the engine should be on compression stroke. If its not the motor will be 180 degrees out
Align the piston number 1 (in firing order) at its bottom most position.
I assume you are asking what is the postiion of #1 piston. Look here http://autorepair.about.com/library/firing_orders/bl-buick-firing-92.htm and pick the correct engine.
Because the spark plug must fire when the piston is at top dead centre of a compression stroke. If the plug fires when the piston is at any other position then you get backfiring etc and no start. The correct firing order ensures the plugs fire at the right time.
Bring #1 piston to its uppermost point and observe position of distributor--it should be firing on no. 1
Number one piston is on the left front looking from front of car and firing order is 15426378 piston sequence is left 1234 right 5678 from front of car
I am not 100% sure what you are asking but try this. If I remember correctly the firing order of a 4.3L is 1-6-5-4-3-2. Stack the firing order numbers like this. 1-6-5 4-3-2 1 & 4, 6 & 3, 5 & 2, are companion cylinders. If #1 is on TDC compression, #4 will be on TDC exhaust, #6 will be 120 degrees out from 1 coming up on compression, #3 will be 120 degrees out from 1 coming up on exhaust, #5 240 degrees out from 1 going down on intake, and #2 will be 240 degrees out from 1 going down on power. If the firing order is different (I think this was firing order pre Vortech heads) you can still apply the same technique to figure out where each piston should be in relation to each other. I hope this helps. Secondly, on a V6 four stroke you will never have a piston 180 degrees out from another at crank time. Cam time the companion cylinder will be 180 degrees out but the pistons are at the same deck height to each other. The most a piston will be out from another piston (at crank time) will be 120 degrees either coming up or going down. A V8 four stroke can have a piston (at crank time) 180 degrees out.
To provide moisture free compressed air to a pneumatic system that operates pneumatic motors.
there is no diffrents in the firing order. with the # 1 piston in the up and firing position, the distributer roter (where ever it may be at that time), place the # 1 wire over it and begain the process from there . most people preffer to have the roter pointing toward the # 1 cylinder, but it does not matter to me. remember that the piston has 2 up strokes intake/exaust so if your car trys to crank but does not, you are 180 degrees out make sure you get the right stroke GOOD LUCK
1-4-3-2 is the correct firing order.
Depends on engine and manufacturer - please be more specific.