ive been having trouble with my car loading up,it ran lean with my stock 02's and it has longtubes and they had every pcv line cut and not plugged off and had a cylinder a 6 misfire and the check engine light would flash,i have since fixed all the PCV issues and installed a oil catch can,new wires and front 02's from a 2000 corvette and now its running really rich,im stumped on if i need new 02's or if it could be a valve issue?

 

What codes does it through now?

 

codes for the 02's and egr

 

Has the car been tuned?

 

it hasnt been tuned yet

 

A simple compression test will tell you if a valve is bent or burned. IIWM I'd
replace the O2s with new and retune. Obviously the computer thinks the
engine is lean and is trying to richen it up. Headers will lean it out, the O2s
are farther away from the engine(heat) and can read differently, and that
screenless MAF can send different info to the computer at idle and low air-
speed situations. A retune should help.

 

thanks for the info,im going to buy some new 02's and new extenders and see how it goes

 

another thing,the car has o2 extenders that did not have direct plug ins,and the wires are spliced together,and the wire colors on the extenders were not the same size or color as the wires on the 02's themselves,and the gauge of the wires from the extenders are a bigger gauge

 

This is most likely your issue as O2s read mili amps and are guage sensitive,
so while your current O2s may not be bad the info they're relaying to the
brain box is innacurate,so the computer don't know up from down.

 

[QUOTE=A.R. Shale Targa;17695040]This is most likely your issue as O2s read mili amps and are guage sensitive,
so while your current O2s may not be bad the info they're relaying to the
brain box is innacurate,so the computer don't know up from down.[/

Good information

 

thanks guys for the info,im going to try new 02's and extenders,a guy told me to use bosch 13111 02's,any info on those?

 

i put brand new bosch 13111 02's on it and its still cracking and popping,but i got to think i didnt take my plugs out yet to clean them im sure they are fould

 

i put new plugs in it and unhooked the battery while i was changing the plugs,started it up and no check engine light so far and running perfect,so im crossing my fingers thats fixed!