so i was driving my 93 saab turbo yesterday and when i got to 2nd gear it jerked like how manual cars jerk right before they stall except my rpms were at 3-4 and then when i push the clutch in it stops then starts up again once i shift into 3rd. i really have no idea what this could be an ideas? also its idle is getting bad it was at 2 yesterday and then it went to about 700 and almost stalled at the light. the only thing i have done to this car was flush the rad nothing with the engine or anything.