Got some problems....

[drano]

k, so about six months ago got a cel, took it to autozone, they checked it (cant remember exact code anymore) took it to a muffler shop, they said cats. put on stromung high flow cat, never put any spacers in, so code came back again, so i guess it was the o2 sensors.

anyways, never replaced o2 sensors and now having more problems that i dont know if they are related to o2 sensors being bad. heres the codes ive got:
p0170 - Fuel Trim Bank One
p0302 - Misfire cyl 2
p0303 - misfire cyl 3
p0325 - Knock sensor - this may be due to car wash earlier that day.

cars runs odd, bogs down when pressing gas sometimes. has shaked a little before at different rpms. cant figure out what gear it want to be in, after shifting the car moves back and forth between gears until its satisfied with that gear and stays with it.

i recently replaced my plugs and wires about 5 months ago.

so what could my problems be, should i clean fuel injectors or replace them, replace o2 sensors, relocate knock sensor?

also when looking for o2 sensor spacers where should i look?

[decke48]

p0170 is usally cause by a vaccum leak after the maf/map or exhaust leak before the front 02. check for exhaust leaks. check over the intake make sure its tight, no crack or holes. after that you need to smoke machine it to see where the leak is. or you can replace all the intake gaskets (manifold, TB, IAC, EGR)
the misfire can be caused by the p0170 so fix that first and see if they come back
and the knock sensor is common for cracking and causing the code when they get wet

[drano]

smoke machine it?

[decke48]

yeah if you have access to one. will tell you if you have a vaccum leak.

[drano]

so what exactly do you do?

[decke48]

attach the smoke hose into the intake hose after the map with the correct adaptor. then look for smoke and pinpoint the leak