Its been a while since I posted here, but have another question My 1958 plymouths flathead runs OK, but there are a couple of small problems( if you can call them that). First, sometimes when the car is running, usually when idling after a stop or start up, the engine will begin to slow down..sorta like it makes a revolution...stop...revolution ...stop..then itll start to speed up back to the normal rpm...Second, when first starting up, the high idle circuit will stay on unless I press the accelerator.Is this normal? Please bear in mind I was born just as everything was going to fuel injection so I dont have too much experience with carberated engines.....Third, While driving, there is a small rumple or popping noise coming out of the tail pipe. It is not like a backfire, but is noticable.
Thank you