Whats up Im new to the site I have a da integra that had b18b in it the hg was blown when I got car took it apart was not worth fixing damage to block also so I got a b20b low miles from trusted seller. I droped motor in with im, tranny, headers,dist., from the b18. Started firt crank no problems runs and idles great. So I hop in the car back out of the garage into the street and.....when I put into 1st and start to go car is bucking like crazyy gauge cluster shuts off all electric shuts off until push clutch in. it acts like if when someone new drives stick for first time. So I backed car into my drive way yeah it drives just fine in reverse no problems. First thing I do is check ecu for codes pulled code 7tps so bought new tps installed calibrated reset ecu and I still have same problem.checked wires grounds fuel pump just about everything just not the right one. Does anybody have ideas.

 

Are you running the stock ecu? That could be your problem.

 

Omg I figured it out the main ground to the battery wasnt grounding good to stock locatiom on tranny I moved it to bolt under battery box works perfect thanks for the reply

 

if the engine starts missing, look into an adjustable fuel pressure regulator. sometimes running the stock pr4 ecu on a b20 can cause a lean condition. from what i've read, bumping the pressure up to 50psi solves the misfire