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Guys, I really need some help on this. It may be something simple, but I have exhausted my limited knowledge. What is happening is this: I can start off just fine, but by the time I am in 5th gear (Datsun 5 speed) and running at 60 mph I seem to be running out of gas. The engine is sputtering and losing power after about a mile. I can then put the car in neutral and coast for a count of four, put the car back in gear and run great for about another mile and then it starts over again. I drove 20 miles like this last weekend and it sure takes away from the motoring experience. Here are the details of what I am working with. I have boiled out the fuel tank twice and the gas coming out is clean. I have now put in the third Facet fuel pump. It is putting out 4 to 4 1/2 pounds of pressure at the carbs with new high quality fuel hose. I have good fuel filters before the pump and again before the carbs. The 1275 engine and carbs were rebuilt less than 400 miles ago. The motor has high compression pistons and a mild cam. I am using a Pertronics ignition and an alternator. I have double checked the floats and needle valves to make sure they are working correctly. Today I changed the fuel cap to make sure it was venting. It seems like the float bowls are not filling correctly at high speed. When I coast, I feel like they are then filling up again and I have fuel until the bowls run low/dry. This has been going on since the rebuild.
Could this be anything else than fuel starvation? I have hit a wall and need help.
Thanks,
Charlie
Could this be anything else than fuel starvation? I have hit a wall and need help.
Thanks,
Charlie