I have a 426 Hemi with dual 600 Edelbrock carbs that are synchronized (I hope that's the right term) and has a MSD electronic ignition with a MSD Blaster for a coil. I went to a car show on the 4th - all went fine going there. On the way back home, I went about 2 blocks and suddenly I had very little power. I thought maybe I had popped out of gear, nope. I went another 2 blocks and made it to my country road home. I started playing with gears and gas then while driving. The car was slow at take off and never got out of 2nd gear. It stayed in 2nd gear all the way home. I tried changing gears and that all worked fine, even put it in neutral and the engine has a very slow power curve. It would accelerate, but very slowly...even in neutral. It was slow power like driving an old diesel Mercedes from the 60's.
You could stomp on the gas pedal and it would give a very slow acceleration even in nuetral. It didn't miss, or sputter or cutout...just a slow acceleration. I had a little less than 1/2 tank of gas, so that was good. I did have a very low battery from not driving it. After I was home, I took off the shaker and all hoses were attached. Had a new air filter. Everything looked good and connected. Checked all plug wires to ensure they were connected.
I did restart it cold later with the elec. choke and it ran fine for about 20-30 secs. I could get a good VROOM and it would go up nicely to 3500 rpms just fine. Then, suddenly it did this "low power" thing again and dropped to below 1K rpms and foot response was slow. Idle was just fine and no missing. My battery was very still low.
I've talked to a couple mechanics and they are both stumped.
Any help with ideas is appreciated. I'm not a full-time mechanic so I'll do my best to answer questions. Thanks! Phil