After installing my LT's i'm experiencing really rough idle

is this due to the fact that I do not have 2 o2 sensors in yet? or is there another problem that could have come up?

i would think its the o2 sensors not being in is throwing something off but I have no idea?

what are some other possibe things to check on

 

Well get everything back on first, this way you can eliminate a lot of possibilities. You dont look for problems with sensors and parts off of the car.

 

yeah tomorrow im gonna get the front o2's in because right now i have the rear ones plugged into the headers cuz i couldnt figure the extensions out but i got it now

so get those in then on saturday a guy with a tuner is gonna come over and flash my car for the rear o2's being out


also gonna check engine mounts and plugs and wires

 

Yeah with the O2's not being shut off your car will run either rich or lean. Your EGR could also be the culprit. Or does the EGR just make you have bad fuel mileage?

 

Then, uninstall it first if there will be changes...lol

 

Id say it's just burning rich but I could be wrong..

 

but would just running rich make it vibrate like that =/
and it only vibrates at idle when im in reverse or drive
when im in neutral or park, nothing happens its fine

 

As stated, put everything back together. If it was running fine before you did the work, then there is no reason why it shouldn't now unless you break smoething or forget to put something back on.

 

You HAVE to have upstream O2 sensors, period.

You can only delete the rears with MILs or a tuner.

 

yeah ryan that could be my problem
i have only the rear's plugged in and extended to my headers soo do you think that will cause vibration?

im trying to fix them asap. i didnt know about taking the tabs off the front ones to make them fit till yesterday