i have 99 accord LX and i been having this problem from like almost year now everytime i reach speed of 40mph it starts jeking alot i mean i havt changed spark plugs and wires like 2 times still didnt get anything out of it pissin me off bad :banghead:

How much rpm drop/rise when it does it? Is it just as it starts to cruise without much throttle?

I ask because you are describing the right speed for a torque convertor lockup shudder...feels like you are rapidly getting on and off the throttle or sometimes people think it feels like OD cutting in and out rapidly...

yeah its not always but wheneever i reach 40mph it starting jerking and then when i go over 40 it will stop i didnt notice the rpm i will do it when i drive today. thnx