230 1 bbl rochester idling then falling on its face
1964 230 inline 6cyl 2 SPD PG 1 bbl Rochester, converted to HEI Distributor. Has been causing me some heartache latley.
A little back story when all was good, and it went down hill. nice late cool evening started up the nova and drove 6 miles in to town. while sitting at a traffic light I noticed I was a low on fuel. I pulled into a gas station and put 1/2 tank of gas in the car. left the gas station and got on a highway traveling 75mph for about 20 minutes. went through a drive thru and got right back on the highway headed back home car was running great at this point. ahead was a texas state trooper on the side of the road issuing a ticket to another car I slowed to 55mph and got over in the other lane giving the trooper as much room as possible, when I applied gas to accelerate back to 75mph the car instantly started sputtering so I pulled over in the first parking lot available and popped the hood. no smoking gun here externally everything looks fine. car is idling good but when I put it in drive and start going all is good until I try to give it the slightest amount of gas and it just sputters.
Things I've checked.
-removed the fuel line from the carb put it in a glass container and turned the engine over to pump fuel into container. let container sit with no water/fuel separation.
-removed fuel line from tank and drained all gas from fuel tank. No trash.
-blew down fuel line that runs from tank to front of car into a rag with air no trash here either.
-Rebuilt the Rochester 1bbl carburetor.
-Replaced the mechanical fuel pump.
-removed the valve cover and valve lash all looks good.
-checked timing new plugs, HEI distributor, and wires.
-run a separate fuel line to another fuel cell. no change in performance.
-bypassed vacuum lines (2) of them 1 goes to 2 speed PG, other goes to HEI Distributor. no changed there either.
-after each thing I changed on the car there was no difference still idles good but falls on its face if gas is applied.
I'm at a loss please if you have any ideas let me know how a car running like a top can just lose all power when gas is applied.??????