I am currently driving a 1986 honda accord 2bl carburated with nearly 300k on the odometer. The car has had its problems like going through fuel pumps yearly but a few weeks ago after a 100 mile round trip I noticed the car did not feel like it was doing what it was supposed to do. And soon after it began having a major problem. The car surges or bolts when the accelerator is pushed or more recently if the pedal is pushed the RPMs will just start to drop. Releasing the pedal lets it idle fine. Car starts fine, idles good. If i pump the gas it will surge up to speed, and when I get to about 4grand on the RPMs it will haul ass with no problems at all no surging etc, but then when i shift it will bog down and the RPMs will drop, unless i pump the gas, and then get it back to about 4 grand. It seems like when i am turning whether left but especially right, the problem improves for a short time until i shift. After driving it this way at high way speeds and teh car is a full operating temp (not going into fifth on the 5speed because it will bog down too much without excessive pumping) sometimes it will improve and i can drive it normally but if i push the pedal just to much and shift it without slowly letting the clutch out it will start the problem again. I have changed both fuel filters. Recently I have been playing with the choke, it seems like the choke heater coil works fine (but only opens the choke), i removed it and its clean, the linkage as far as i could see is free to move, i lubricated it and cleaned it etc. One thing i noticed and as mentioned in my chiltons manual it states that depressing the accelerator completely and slowly releasing it should set the choke plate (the butterfly on top) when below 82 degrees it should close completely, when above to about an 1/8", but the accelerator has absolutely no effect at all on the choke plate. I am thinking it is the linkage but i cant see under the choke if it is connected on the bottom someplace else. (like to the throttle cable plate or whatever, or if there is a spring missing etc) The vacumn opener seems to work good, no blockage in the ports, so does the fast idle unloader. There is no vacumn leaks I see or hear. The fuel pump was recently replaced but i wouldnt rule it out, but everything i see points to the choke because if i choke it by pushing my finger on the butterfly while giving it gas on the throttle cable it works like it is supposed to, no bogging down. Is the vacumn choke opener connected to the choke? Becuase when it starts to bog down it trys to push down (as in trying to close the choke) but it seems like they are separate because there is no effect on the butterfly. There is definetely a problem with the choke, but I havent checked into fuel volume, and that hose that connects to the exhaust and the air intake I removed seeing as it was not in the best shape anyway. (if i remember correctly this was after the fact or problem occurred, besides its the summer, so carburetor icing shouldnt be a problem) and I have no idea where the hell or what a thermovalve looks like. I would greatly appreciate any and i mean any insight on this problem. I dont know much about carburators but after studying that chiltons manual I gained some knowledge on it, its complicated as hell!