dv3

its missing and back firing at low rpm's ....its alot better when i gas it but there is still a stlight miss even then .....i put new plugs and wires in but no help ...
...any suggestions?

mjr46

You may want to run a KOER TEST which should verify o/2 operation / mass air and egr etc etc........ after that if any codes show up troubleshoot them and from there you need to isolate the miss to a cylinder via an occiliscope is the best way but verifying internal cylinder untegrity is a good option through a compression test or cylinder balance test

blkonblk5.0

A dirty MAF can cause a LOT of problems yet it's one of the easiest things to fix. try to clean it.

*EDIT* also is your check engine light on?? couldpossibly be o2 sensors or a combo of both.

dv3

so i did a koeo test and got the code 91...
is this the drivers o2 sensor ?
front or back?

i have stock headers ...is this gonna be hard or can i do it in an hour b4 work tomorrow?

thanks

Kick_Ass2k1

I would set aside more than just an hour in case you run into some kind of problem. You'll need a jack or ramps, an O2 sensor socket (I prefer the crow'sfoot type), and probably a breaker bar (or at the least a ratchet). FYI, its best to replace the sensors in pairs too.