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#11
12-13-2010, 06:49 PM
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Quote:
Quote:
WUT!?
__________________
 1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore.  BAAAAAA!!!!!! 
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#12
12-13-2010, 06:57 PM
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Yeah I pretty much figured this would be the response... I'm getting a P0430 (or 420 can't remember) but I just replaced the O2's along with the high flow cats, but maybe I just have a bad O2 sensor? That's what I'm hoping because I could get a new one under warranty.
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1999 Camaro z28 (1 of 64) Mystic Teal Metallic, 6 speed, t-tops Livernois Stage 2 cam 595/595, 232/232, 114 lsa, ported 241 heads, Comp springs, moly pushrods, LS7 lifters, Clevite valves, SLP oil pump, LS6 timing chain, LS6 intake manifold, Pacesetter Longtube headers, custom SLP Loudmouth II true duals, CME, SLP intake 402 whp, 382 lb-ft torque 
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#14
12-13-2010, 07:44 PM
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Quote:
__________________
1999 Camaro z28 (1 of 64) Mystic Teal Metallic, 6 speed, t-tops Livernois Stage 2 cam 595/595, 232/232, 114 lsa, ported 241 heads, Comp springs, moly pushrods, LS7 lifters, Clevite valves, SLP oil pump, LS6 timing chain, LS6 intake manifold, Pacesetter Longtube headers, custom SLP Loudmouth II true duals, CME, SLP intake 402 whp, 382 lb-ft torque
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#15
12-13-2010, 08:12 PM
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Also just dawned on me how are you running lean? If you have a MIL on then you should be on open loop and running rich, what lead you to think you were lean?
What do you have in there for 02 sensors? Some of the aftermarket ones are just junk.
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5.3L LSx, Fbody .500 cam, TH400, 4500 Stall, Moser 9"
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#16
12-13-2010, 09:47 PM
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MIL Doesnt always mean open loop. if the O2 is reading just out of range the ecm will still use its reading throw a Lean or Rich code and keep running that way. AGAIN get it checked out it could be anything. and besides P0420/P0430 is cat efficiency Not O2 sensor anyway. Wich in itself wont cause an open loop/limp mode either.
__________________
1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. BAAAAAA!!!!!!
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#17
12-13-2010, 10:10 PM
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Josh the car was run on the dyno with a wideband at Don's and it was lean.
If you're getting P0420 (bad cat) it's probably because of the high flow cats, they will not work as efficiently as the stock cats.
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