1-8-4-3-6-5-7-2
At cylinder 1, should be labeled on distributor cap.
Firing order starts with the #1 cylinder which is normally the first cylinder closest to the front of the engine.
1-8-4-3-6-5-7-2 is the most common firing order. Bring the number 1 cylinder up to top dead center. And find out where it is pointing on the distributer, put the cap back on ,then start putting the plug wires clockwise on the distributer starting where it was pointing on the cap with number 1.
It always starts from the front of the motor.
timing advanced, 180 out, Chevy requires delayed vacuum for advance, did you change the vacuum supply location? firing order 18436572 clockwise on distributer, turning distributer counterclock wise advances timing,
Either the distrbutor cap is cracked or broken or the plug wires are not in the correct firing order or the drive for the distributer is partially broke or the valve train is to tight.
it could be the firing order if u had it tuned up lately check the spark plug wires 2 see if the firing order is right.if that is not it then it could be the timing, which can usually be fixed easy by turning the distributor a little bit.
in the front
The firing order should be on the intake manifold and you start counting on the cap where it is marked something like one? or a tick mark
The firing order start on the number one cylender. Which is the first cylender on the passenger side closest to the front end running in a clock wise direction. when seting your distributer make sure the cylender number on is all the way up and set your router on your distributer pointing towards cylender number one.
sounds like you have moisture in the distributer next time it wont start, remove distributer cap, and using a hair dryer, dry inside distributer cap,and inside distributer
1-8-4-3-6-5-7-2, clockwise. driver side 1-3-5-7, pass side 2-4-6-8. #1 should be labeled on the cap.