Quote Originally Posted by 4.3L260z
I have a Chevy 4.3L V6 with a 525 CFM Road Demon carb. I was getting a large
stumble off idle and at 3000-4000 RPM. I installed smaller squirters and it solved the off idle stumble but there is still a large flat spot from around 3000 to 4000 RPM. If anyone has any advice it would be greatly appreciated.
Thanks
The stumble off idle has to do with the acc. pump.
Try changing out the vac. sec. spring to a stiffer one.