MozeSS523 Posted August 19, 2008 Report Share Posted August 19, 2008 I had the dynatech long tubes installed in febuary and hours after I started throwing codes for the post cat 02 sensors. I figured it was because of the new location of the sensors and the amount of flow that was affecting the readings. After I got sick of clearing the codes weekly, I turned the emmision monitors off. I am now trying to find another soloution, and before making a decision I would really appreciate some input from from ya'll. Should I be conserned that it is throwing codes in the first place? Should I turn the monitors back on and just put some simulators on the post sensors? I am also going through the same problem with a Trailblazer SS with kooks headers, and will probably do the same thing to it. Does anyone see problems that would arise from doing this? Thanks Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted August 19, 2008 Report Share Posted August 19, 2008 Did you re-tune for the headers? What codes did you throw? I installed the Dynatech header/cat package on mine back in March and have had zero issues with codes from the rear 02s........ Quote Link to comment Share on other sites More sharing options...
smoke03 Posted August 19, 2008 Report Share Posted August 19, 2008 yeah If you didnt tune for the headers then your going to throw codes. Get a custom PCM tune and have your post cat sensors disabled and that should solve your problem. Quote Link to comment Share on other sites More sharing options...
MozeSS523 Posted August 20, 2008 Author Report Share Posted August 20, 2008 I have a custom tune for the headers, we used hp tuners. I used that to turn off the emissions monitor Quote Link to comment Share on other sites More sharing options...
MozeSS523 Posted August 20, 2008 Author Report Share Posted August 20, 2008 which parameter do I need to have changed? Quote Link to comment Share on other sites More sharing options...
smoke03 Posted August 20, 2008 Report Share Posted August 20, 2008 which parameter do I need to have changed? not sure about that one as I had my truck tuned by someone else. Maybe some of the guys that are a little more familiar with hptuners and tuning in general will chime in here Quote Link to comment Share on other sites More sharing options...
SSThunder Posted August 20, 2008 Report Share Posted August 20, 2008 (edited) mine did that also so i had zippy turn them off. Edited August 20, 2008 by SSThunder (see edit history) Quote Link to comment Share on other sites More sharing options...
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