Hey guys, as of late my CJ has been cranky when it's running a little cold. When you first take off on the road, it sort of dies down and acts like it doesn't have any power. It almost feels like the timing is retarted a bit, or it's being starved for fuel (doesn't smoke, so it shouldn't be flooding). If you put your foot into it, it will die out, then backfire out of the exhaust most of the time, but will sometimes backfire back out the carburetor (from what I can hear). Once you take your foot out of it, it will run normally, but still has this hesitation.
I thought this had to do with the fuel pump so I replaced that, which helped cranking it but it still has this problem. I've also found it's gotten worse; it seems that it doesn't matter whether it is cold or hot. I was at my local Jeep parts store and went in for about 10 minutes, came back out, cranked it and took off, and it did this hesitation thing again.
I have the Weber 34/34 with the nutter, and this is a 1986 258 I6 with stock spec'd distributor, wires, plugs, etc. I know the vacuum line going from the carburetor to the distributor is getting vacuum (you can feel it sucking). The only thing I can think of is that the timing is off. I also haven't installed a fuel pressure regulator yet, would this cause the problem? I wouldn't think that it would because the Weber should be getting more gas than it needs, not less and being starved. I really can't tell if it's being starved for gas, but I'm leaning more towards a timing problem. What do you guys think?