Hey all -
I put this over in the "clustertruck" thread as well, but I wanted to open this question up to everyone.
For reference: My truck has a 283SBC and a Rochester Quadrajet carburetor. Qjet was rebuilt right after I bought it 3 years ago, and only has about 500 miles through it since then.
I just installed new fuel lines running from the fuel pump up to the carburetor. I wanted to run hard lines instead of the rubber ones that had been there previously. I also tuned up the truck - checked and set timing (20deg BTDC @ idle, 34 @ throttle, vacuum advance plugged), and adjusted idle and fuel mixture (using a vacuum gauge).
Now, it idles great, and has awesome throttle response BUT:
1. If I hold the engine at higher RPM's (~2500) for more than about 5 seconds, it stalls the second I let off the throttle - SOMETIMES. But it still stumbles when you unload it.
and
2. I decided to take it for a spin, and only made it about 100 yards before the carburetor completely and catastrophically flooded. Fuel was sitting in the venturis, coming out the baseplate gasket, and leaking out the accelerator pump. Managed to clear the flood, get it turned around and limped home before the carb flooded again.
It still won't flood at idle, and actually wasn't even stalling when revved sitting still, it's only flooding when I actually put it under load - in gear/driving it.
Any thoughts on what might be causing this?
I put this over in the "clustertruck" thread as well, but I wanted to open this question up to everyone.
For reference: My truck has a 283SBC and a Rochester Quadrajet carburetor. Qjet was rebuilt right after I bought it 3 years ago, and only has about 500 miles through it since then.
I just installed new fuel lines running from the fuel pump up to the carburetor. I wanted to run hard lines instead of the rubber ones that had been there previously. I also tuned up the truck - checked and set timing (20deg BTDC @ idle, 34 @ throttle, vacuum advance plugged), and adjusted idle and fuel mixture (using a vacuum gauge).
Now, it idles great, and has awesome throttle response BUT:
1. If I hold the engine at higher RPM's (~2500) for more than about 5 seconds, it stalls the second I let off the throttle - SOMETIMES. But it still stumbles when you unload it.
and
2. I decided to take it for a spin, and only made it about 100 yards before the carburetor completely and catastrophically flooded. Fuel was sitting in the venturis, coming out the baseplate gasket, and leaking out the accelerator pump. Managed to clear the flood, get it turned around and limped home before the carb flooded again.
It still won't flood at idle, and actually wasn't even stalling when revved sitting still, it's only flooding when I actually put it under load - in gear/driving it.
Any thoughts on what might be causing this?