So unfortunately, I have let my '70 XR7 351w sit for a year or two. Trying to get it back running again. I have a 4bbl Holley 4160 600cfm carb that I just took off and cleaned/rebuilt (metering screws are backed 1.5 turns from bottom). I put it back on today hoping I could get it fired up and moving. I have my timing set roughly to10 degrees BTDC. I can get it to run (a little smokey…kind of a dark grey), and if I let it get below 1400 rpms it starts chugging and cuts off… giving it throttle sounds smooth/good/normal, So I don’t feel like my timing is way out of whack. Was wondering if this is just old gas causing my problems, or is there something else I need to be looking at?
Any help/suggestions would be great
Old gas is definitely an issue. Drain it and start over
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Check that the secondary shaft is completely closed at idle. The linkage may need adjustment by bending the rod.
May want to remove, clean, and re-gap your plugs. The old gas may have fouled them a bit. Also if equipped, clean/replace and adjust your points.
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