pnoise2003

Hi guys I need your help with my problems. I have a 2002 civic si hatchback
I have had weird problems with the car.

I have had a fuse blown under dash for the o2s heater, replaced fuse with correct amp and cleared CEL. drove it for 40 miles then car had a code for p300, p301, p302, p303, and p304. i went to gas station and pulled out the fuse for ECM and after that no CEL and no CODES

But car hesitates on 500-2000 rpm while accel, jerks at 3000rpm while driving, and idle drops down to 200 and comes back up to 800 sometimes 1300. went to work car drives fine when it is warm and sometimes jerks @ 3000rpm while running 65mph (sorry i dont know how to describe it better) feels like something is cutting off while driving.

driving home from work car started fine no codes no rough idle, but it was low and shoots down to 200 and back up, exited frwy then CEL came on for p0122, p301, p302, p303, and p304.

When i got home i left the car running at idle and tried unplugging each coil connector and i noticed the car shakes on each coil i unplugged..

I really do not know where to start. I am already feeling bummed about it and cannot even think where to start and how much it will cost me to get it back to normal.

any help will be great, i am not a mechanic, but i am willing to learn thing to save me $$$ and i also hope that this is not major problems.

B18c1vicrx

p0122 is low input to the throttle position sensor and codes p0300-p0304 are random misfire and misfires in cylinders 1-4, I would start with code p0122 because this is the most likely culprit for the misfire codes. You need to know what voltage the tps is suppose to read at wide open throttle and fully shut and confirm your tps is within specs.