help! something happened need to find out what

[Spartanzz]

Ok so today I swapped o2 sensors and jumped on the free way and went wot. Next thing is there is loss of power engine light flashes so I slow down and you can hear the rough sound of a misfire. So I pulled over check the codes at first it said cylinder 3 misfire. Next it says systems bank 1 too lean. So pulled the plug for 3 and it was fine check the injectors even switched them to see if it moved. Got it home and now its random multiple misfire and there is major loss of power and you can hear the car rattle when trying to give it gas. We were trying to find a cylinder 3 misfire before but that was only at idle and we thought it was something stuck in the fuel rail. Could all this be caused by the o2 sensor? Any suggestion would be greatly appreciated because I have to have this fixed ASAP...p.s. I don't have my hands on a compression tester so will be trying that tonight. And probably flushing the rail to see if that changes anything.

[blueguy]

Bank 1 too lean means you have a vacuum leak.

[Spartanzz]

Well see that's what I thought and when I looked under the hood I saw the vac tee connected to the fuel pressure regulater was also piped off so I put it back on and the lean code is still there as well as the multiple misfire code...

[Spartanzz]

Well just an update, but today i was told i should reseat the PCM could have gotten knocked around and another guy told me to just disconnect the battery and reset the computer. so...i did both lol after everything was back in a reset it started up and ran great got in the car drove down the street and code comes back car start running terrible again...i have a feeling the sensor i had in there is bad...guess ill find out tomorrow.

[nascartech]

let us know what u find

[real diehl]

Well just an update, but today i was told i should reseat the PCM could have gotten knocked around and another guy told me to just disconnect the battery and reset the computer. so...i did both lol after everything was back in a reset it started up and ran great got in the car drove down the street and code comes back car start running terrible again...i have a feeling the sensor i had in there is bad...guess ill find out tomorrow.

OBD2 Doesn't always reset by disconnecting the battery. And reseat the PCM because it got "knocked around?" Who is giving you this information?

[Spartanzz]

Ok new update for yall! Got it fixed. Seems it was the icm...which confuses me because either the lady who had it before me was lieing about it being new or this thing has now eaten through a new icm...but either way the icm wasn't giving any spark to the top coil pack so I got one and replaced it today and I can notice a huge difference in power that's why I think the lady lied lol