09-26-2005, 09:27 PM
OK sorry for this being so long but I feel it necessary. 3 weeks ago I did Pacesetter LT's(ceramic coated), removed cats, mandrel 2.5" all around,Magnaflow dual in/dual out single stainless muffler,and LT1 fans. I had a number of exhaust leaks but fixed them all and even put Nitrogen through the system to make sure. The next day I started to get a terribly rough idle-it would go to 3k and back down and repeat untill it ran for about 5 minutes then it would start to load up. When scanning I wasnt getting consistent o2 readings so I replaced both front 02's(obviously the rears are gone and turned off) and they were both totally clogged so it was needed. Well since I got the new o2's(stock ones) it has gotten worse. It feels like when your driving with 7 spark plugs except worse-it bogs and loads up and sounds like I have a flat tire! But I can drop it in 2nd(automatic) and get it in higher rpms for a few seconds and it clears up. I can but it back in drive and most of the time it clears it up and drives fine. Then the next time I crank it up sometimes it will be better sometime it wont. Each morning though this is the case. Through this whole ordeal I have been tuning hoping I can fix it. I have tried in speed desnsity and MAF. At times we would flash it and it would be fine then start back up sometimes in minutes other times hours. We thought I may of had a corrupt file but I put my the tune in I had before the headers(that I had no issues with before) and it didnt help. Ive read about you F-bod guys having issues with your o2's heating up after LT's and I dont know if these sound like problems from that. I have a stock MAF but it is descreened(for over year now). COuld this be a factor? The only code Im getting now is a P0200(injector circuit malfunction). Please help Im running out of ideas! My mods in the sig a current! Obviously I had to adjust my tune after the exhasut leaks and after the o2 fix but now they are fine except when it starts to load up/surge. We thought for a second that I was running out of injector but that doesnt seem to be the case.