GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

problems with o2s

Old Jul 31, 2010 | 09:44 AM
  #11  
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swap to a corvette rear sensor
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Old Jul 31, 2010 | 06:27 PM
  #12  
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but its not the front sensors its the front sensors that are flashing the engine light
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Old Jul 31, 2010 | 07:43 PM
  #13  
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Originally Posted by nicky g
but its not the front sensors its the front sensors that are flashing the engine light
what?

did you mean its not the "rear" sensors making it flash? i understand that. your rear o2's should be turned off first of all. the only way I know how to fix the problem you are having is swap to a 02 corvette rear o2 sensor bc it doesnt have to burn as hot. or hell just depin your rear o2 sensors and swap them in.

if you are having a misfire in the #7 cylinder then its a spark plug, coil harness, or spark plug wire. all you did was add LTs, i dont have this problem but you are. did you ever go check and see if it had a problem with the boot or wire itself?
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Old Aug 1, 2010 | 09:18 PM
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well the wire was kinda touching but i changed the wires back to the stock ones and then i changed the spark plugs also and it still did the same thing. The computer said that once and then i recently checked the codes and all it showed was insuffient o2 sensors on both sides
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Old Aug 1, 2010 | 10:32 PM
  #15  
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do you have any exhaust leaks?

i think its in the tune, but it could be the o2s arent reading hot enough gasses
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Old Aug 2, 2010 | 11:38 AM
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no sir
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Old Aug 2, 2010 | 02:05 PM
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change the values of when the o2 sensor throws a code. its always hanging the signal, so maybe you can set the light to come on when it stops reading completely. like a 300 or something. it normally ranges from 430-875ish in my truck
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Old Aug 3, 2010 | 12:03 PM
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I think i'm having this same issue. Does anyone know if the c5 rear sensors are plug and play?
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Old Aug 3, 2010 | 12:08 PM
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i have read that if you adjust your timing at idle which will heat up the exhaust more thus keeping the O2s happy....
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Old Aug 3, 2010 | 06:37 PM
  #20  
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no the o2s are not plug and play, you have to splice them into your old plug
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