Car running funny after driven a little

"Runs like shit" covers a lot of posibilities. Before going to the trouble of adding a carb spacer why not locate the cause of the problem first. If it is running rich it could be due to a leaking float valve, an aftermarket fuel pump that's delivering too much pressure, leaking power valve, dirty air filter, sticking choke........

If it's running lean check for an obstructed fuel filter, inoperable power valve, failing fuel pump, dirt in the carb.......

A failing ignition coil can also cause the symoptoms you described. Good luck...Al English

Thanks., that will get me started. It doesn't want to idle at a light after the motor warms up. When on the highway it's fine until I slow down and let off the accelerator.

Look for a vacuum leak.

Chuck

I HAD THIS SAME PROBLEM WITH A CAMARO THAT I OWNED. IT ENDED UP BEING A BAD PCV VALVE. THE VACUUM LEAK AT AND IDLE WAS JUST TO MUCH.

What cam do you have? The last guy that complained of his newly-purchased Pantera dying at signal lights, was running a 0.710-lift cam with 285 degrees of duration @.050 lift- basically a NASCAR cam made for the Talledega high-banks...

I have basically a stock motor with rebuilt heads and aluminum intake and 600cfm holley with aftermarket headers. No trick mods at all. I think maybe it is getting hot because only one fan is running right now and no thermostat installed! (and of course I need to move the sensor to the block to get an accurate reading.