You know, I would be very happy to answer your question, but you must help me. No way can I or anyone else answer this question, as you do not list what engine you are talking about. 4cylinder, V6, V8, Chevy, Ford, 350, 2.0 liter, etc. I need to know what engine you are talking about. They are not all the same. So I will place this question in my watchlist. List the engine and I will try to answer it.
Number 1 plug is located drivers side front of engine. Firing order is 1-2-3-4-5-6
Second from the left.
Ford Explorer V6 engine : firewall 3 - 6 2 - 5 1 - 4 front
firewall 3 - 6 2 - 5 1 - 4 front
Front Plug on passenger side.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Mustang ( V8 )
bank 1 are the odd number cylinders ( 1,3,5 ) and bank 2 are the even number cylinders. Referring to the owners manual, Bank 1 is the closest to firewall, bank 2 is towards front of car the bank 1 camshaft sensor is located on the drivers side, just below the valve cover on the head closest to the firewall. look for a green plug. also it will be the sensor with the straight plug. bank two has the angle plug.
Firing order is 1-2-3-4-5-6 Distributor rotates clockwise. Number 1 plug is located on passenger's side front of engine. Number 2 plug is on front of engine driver's side and so on.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Ford Expedition
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front