So I had a thread previously after rebuilding my '81 CCC carb a couple years ago, but I figured I'd start fresh, though I'll recap that one a bit.
Ran incredibly rich and I couldn't get the MCS dwell reading to go higher than 3. To be certain it wasn't the timing light I was using (that measures dwell), I went and bought the pinnacle of technology in 1981: the OTC Monitor 2000. Connected it up: still 3. Long story short, adjusted the idle air bleed a bunch and suddenly I had varying dwell and could tweak it to exactly where it needed to be. The Monitor 2000 also told me that my TPS was reading nearly 5V at idle, with no change at all no matter how you adjusted it, so I replaced that and was able to set that to the correct voltage as well. I had also replaced the O2 sensor with a new one, so that is new, as well, just in case.
So, that's where I am at now: New O2, new TPS, and have a tool that can confirm all necessary readings and thus tweak everything in closed loop to the proper spec, and have. However, all isn't exactly well.
One of the bigger issues I have is that when this thing is in open loop, it runs like absolute trash. If you have it warmed up and running in closed loop and it then falls back into open loop, it'll try to die. Suddenly starts idling lower and lower. If you bring engine speed up and bring the engine back into closed loop - back to perfect. But this also means cold starts usually require throttle input to keep the thing from dying. When you rev it so it doesn't stall, it sounds like it's breaking up. The throttle response is far from great during all this as well, so it affects drivability as well - end up doing a lot of chirping gears when trying to shift because you really don't know if the throttle is going to act the same was as 2 seconds prior.
The other issues are somewhat more minor. When warmed up and driving around, full throttle usually feels like two stages - it'll kinda just sit there and make a lot of noise and then it starts to pull. Sometimes this even happens with just moderate throttle (part of why driving the car can be so difficult sometimes, as it lacks any kind of consistency). Even when warm, blipping the throttle to rev match on a downshift produces varying results. Sometimes you get a great rev and things sound great - other times it basically does nothing and you end up chirping the tires as you let out the clutch. The full throttle issues may very well just be related to the secondaries being out of adjustment, but the throttle response varying so widely might be more related to the initial issue (or not).
