S14 misfire

[robmontoya11]

Someone please help I have been going at this for weeks!!! I have a misfire in which it ideales rough and makes muffled popping noises when idling as if it's not getting spark or has fuel cuts. It also loses a good amount of top end power and sometimes makes a nasty noise that sounds like it's leaning out hard. I have replaced fuel filter, have a Walbro 255 fuel pump, MAF, distributor with cap and rotor, spark plugs, injectors, air filter, added engine ground, replaced oil, and adjusted idle. I went to get an OBD scan and I got 3 codes: EGR(removed), speed sensor, and some air sensor for this car but when I looked that code up online, nothing popped up. I am led to believe the only things left that may fix the issue are TPS, Bad wiring harness or ECU. Someone please provide further input I would greatly appreciate it.

[Nissan2nr22]

What about the cables and coilpacks?

Check/clean those out, electrical grease etc.

[jedi03]

double check timing too

[robmontoya11]

I already checked timing it's on point

[EDT007]

I can only assume that it's a KA since you didn't specify. It would help if you actually listed the P-codes you received from the OBD scanner. What year is the car?

[robmontoya11]

Just went to Autozone, the codes are p0110 Intake air temp sensor, p0500 speed sensor, P0325 Knock sensor, most likely activated by solid mounts or misfire, p1605 A/T diagnostics communication line( converted to manual), and P1400 EGR(removed)