92 tranny problems

[toyorotor]

hello everyone.... new here and was wondering if anyone can help me???
i have a 92 accord 2.2 that i use to go to work and back, its a great car, but its starting to give some tranny/electrial problems: when i start the car the D4 light comes on then turns off after a moment, then when i am driving the car shifts its self back into third gear, while the D4 light is still on, if you shift it into neutral the D4 light still stays on???? i recently went to the junkyard and got a set of shift solenoids from a 97 accord "top and bottom solenoids" cause i dont know why theres four, well regardless i installed them and now i only have 2nd gear and D4, can anyone give me some advise on this????