i have a 91 honda accord ex automatic the problem is that the car runs good you step on the gas it runs good in nutral it runs good but when im driving it and try to stay at a steady speed 35 or 55 ( any speed ) it starts to act like it is missing or running on 3 cylinders its not giving any codes to it seems to be in gas but not sure if anyone can help oh by the way its 2.2 liter
terry

 

chk your plugs and plug wires