Hello,
I have some troubles regarding my olds -60.

When the engine is cold, it runs fine. After a while when the engine gets hotter and hotter, it starts to run more and more bad. Almost as if one cylinder doesnt fire. At first, it runs a little rough but its driveable. It intensifies pretty fast and runs rougher and rougher. It only accours on low-mid RPM, if I floor it, it runs fine on the higher RPMs.

Any ideas what could be malfunctioning? Vacuum leaks? I’ve replaced all the sparkplug wires.

 

Are there any well plugs on the 4gc carburetor? I have a aftermarket electric fuel pump, and it has to refill the carburetor a bit when its been sittning for like 24h. Figured the carburetor might be flooding?