Alright I got myself a scangauge II in December and have been watching my KR along with other info. I am typically seeing 3-4 degrees KR climbing hills and in general at the beginning of acceleration. Sometimes I can see as high as 6 but rarely. My thoughts are that by installing a 3" catless zzp downpipe I could eliminate the KR and get better mileage, car has about 120k on it now so I figure the cat might be getting restrictive. I don't plan to mod this car extensively. It is a 2002 gtp. I have been reading that the zzp Rear O2 emulator will not work on 01 and up, they say otherwise but its all over in this forum that it won't work. I also have been reading that HPtuners will not allow you to delete the rear O2 sensor test that dumps fuel. Help with tuning a series 2 L67
My concern is that even if I buy a catted downpipe I may still get a cat code. I would like to delete the cat and avoid the issues in the long run that might be experienced like plugging it up etc. I have access to an older version of HPtuners. Does anybody know for sure if it can be used to delete the rear o2 test and not just the resulting codes?
Or as another option does the bung extender work?
Asking because it seems none has followed up on solving this issue on an 01 up car.
