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Engine 304 backfire through the carb

Engine 304 backfire through the carb

FFEH

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Location
Central Texas
Vehicle(s)
1973 cj 5 304 t-15 3 speed transmission
I have a 1973 CJ5 AMC 304 AMC manual Transmission . The tub is off and I am trying to get the engine to start. I am getting a backfire through the carburetor which suggests timing to me. I have the jeep at TDC and the picture #1 shows the picture I am using to get everything in the right place according to the picture. I noticed today that my rotor is not pointing to the distributor cap where I have the number one plug wire picture#2. My finger is on the #1 wire. This doesn't match the picture in relation to the cap screws. The rotor is pointing to the # 1 one spark plug. So I think I have the spark plug wires wrong. My question is should I put the plug wires as they are shown in the pic or is the cap orientation wrong to begin with? If you look close you can see the distributor cap screws are not in the same orientation as the picture. Thanks for any help.


1759451782642.webp 1759451782633.webp 1759451782658.webp
Pic1 pic 2 pic 3
 
With the engine at TDC, put the #1 wire on the cap where the rotor is pointing, regardless of whether that is straight at the front as shown in the first pic or not. Then put the other wires in the proper firing order clockwise around the cap. If you really want the #1 wire to be where the pic shows (straight at the front) you may need to pull the distributor and rotate it a bit (a tooth or two on the gear) to achieve that alignment.

Also keep in mind that you could be 180 degrees out. That means while the #1 piston is at TDC, you may not be at the top of the compression stroke where the plug should fire. You may at the top of the exhaust stroke instead. With the #1 piston at TDC, where is the timing mark on the harmonic balancer? Is it at or near the zero mark also?
 
that is correct. if the #1 piston is at TDC you can put #1 wire where the button is pointing on the cap and wire accordingly. if you want it where the rotor button is pointing at #1 on the cap the distributor will need to come out and dropped in so the button is pointing at #1 to ensure the engine is at TDC make sure your timing mark pointer is pointing at your mark on the harmonic balancer and the #1 piston is at the top. but was the engine running? what made it stop running?
 

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