Rep Power: 646

iv posted my question on here b4 once but response wasnt that great

vehicle: 1994 civic dx
Engine Swap: 99 B18B LS ( running 95 LS ecu )
Problem: RPM HUNTING ISSUE

1) everytime i start the vehicle, idle is very low so i gotta keep my foot on the pedal 10% for a min or two, for it to idle n not shut down on me
2) no matter which ever gear im in, around 2500RPM-3000RPM it will start to jerk, start hunting. if u go above or below that range drives fine.

i have to unplug idle air control valve, for my car to run. if plugged in starts hunting up n down as soon as u start the car

i have tryed 3 diff idle air control valves (used) same result

tryed 2 diff tps sensors still no luck

PLZ HELP. IV SPENT ALOT OF MONEY N TIME BUT NO RESULTS. THANKS

 
Rep Power: 636

Im may not know honda's well but would the problem still occur if you were running the motors stock ecu? If Im not mistaken, a 99 motor is different then a 95 since its OBD2 for one thing and it has more sensors..

Also does your vehicle have a mass air flow sensor?

 
Rep Power: 646

yes i belive it does have a map sensor. i have also tryed the old ecu same problem
i have 2 unknown plugs that dont go anywhere. 1 i got no clue the other looks to be a a intake manifold sensors. but this 99 engine has no room for that sensor on the intake manifold.