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Does anyone have instructions on how to properly position a distributor on a 428 that was rebuilt. I set my #1 cylinder at TDC and install the distributor so that it looks like #1 spark plug wire on the distributor cap is in the 5 o'clock position (standing on the drivers side of the car). The dist. rotor is just underneath the #1 position in the dist. cap. Just like the old mustang books show it. The engine turns over very slowly and will not fire. I see gas going down the carb when I turn the throttle, and it backfires through the carb when I turn it over. Makes me think the timing is retarded and I may have the distributor in the wrong position. I have tried the other closest cam geat positions, but no luck. Any input on properly placing the distributor would be appreciated. Thanks.
At number 1 TDC is that on compression or exhaust stroke TDC, you 180 degrees out? Pull plug, place thumb on plug hole then bump starter until you feel compression. Set crank at 10 degrees BTDC, rotate dizzy until you just get a spark at # one cylinder, static timed until you get it running. Start, oil pressure OK cool then set timing check for leaks then tune carb and enjoy.
The 180 degree out thing could be your issue. Being that it's a 4 stroke engine, the timing mark comes around twice per full cycle. What that means is that just because you have the mark on TDC for #1, it does not guarentee that the piston is on the compression stroke. As Beemer said, make sure you're on the compression stroke by feeling through the spark plug hole. It's obvious when the cylinder is coming up on compression...when it is then stop at TDC and set your distributor. One other thing...just because you've lined it all up does not ensure it will start right up. You're really just getting it in the ballpark here....when you try to start it you may need to rotate the distributor one way or the other to get it fired up.
Just a side note...it does not matter where the plug wires are on the cap. As long as they are in proper firing order going in the correct rotation. #1 can be in any position as long as you point the rotor to it when you install dizzy at TDC.
I was pretty sure I had the #1 piston at the top of the cylinder. The timing mark at 0 deg. and the distributor rotor pointing at #1 on the cap. I took the spark plug out and put a screwdriver on top of the piston to see where it was in the cylinder. Good to know that the placement of the #1 distributor cap wire is not important as long as everything else is set-up correnctly. Thanks, I will have to dive further over the weekend.
I was pretty sure I had the #1 piston at the top of the cylinder. The timing mark at 0 deg. and the distributor rotor pointing at #1 on the cap. I took the spark plug out and put a screwdriver on top of the piston to see where it was in the cylinder.
You may be right on, however, this needs to be at the top of the compression stroke, not the top of the exhaust stroke (ie 180 degrees off). Just be sure your finger feels pressure on the up side and both valves are closed when you get to the top. You will make it work, just take your time and don't rush...
To test the "180 degrees out" thing (it's really 360 degrees out ), just do this:
Where you "think" #1 is, put #1's spark plug wire on the exact opposite side of the distributor cap and set the rest up according to the firing order - counterclockwise!
For test only that would work but man that makes a mess out of your ignition wires if they were cut to length for a clean custom looking installation.
Were waiting to hear if you have zoom, zoom!
.....=o&o>.....
You guys were correct. I changed the location of the #1 spark plug wire on the distributor cap and then followed with the rest of wires. I was able to start it up with this setup. I guess it is time to take off the valve cover and make sure I set #1 at TDC with the intake valve open. Thanks guys. This was exactly what I was looking for.
Yes, pull the #1 plug, and rotate the engine by hand, until you feel compression at the #1 plug hole. Then, keep rotating (clockwise) until TDC comes up on the damper.
You guys were correct. I changed the location of the #1 spark plug wire on the distributor cap and then followed with the rest of wires. I was able to start it up with this setup. I guess it is time to take off the valve cover and make sure I set #1 at TDC with the intake valve open. Thanks guys. This was exactly what I was looking for.
Closed, both valves are closed at TDC. If you bump the engine until the intake opens AND closes, the next time the timing mark lines up is TDC.............
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