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running without o2s for a day??????

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Old Apr 28, 2008 | 10:26 PM
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Default running without o2s for a day??????
i know i know not good but, what i wana know is when i left the shop (no tune all 4 o2s unplugged) after my long tube install, car felt AMAZING, no ses light........... stopped by store, got back in ses light on, car is WEAK!!! so what do you think, "limp" mode? extentions and predater come in tommarow.
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Old Apr 29, 2008 | 02:36 AM
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i know what will fix it i just wanna know what its doing....is it like in a default mode? or what? im just curious.
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Old Apr 29, 2008 | 02:52 AM
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The car is dumping fuel because it's not seeing the 02s..
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Old Apr 29, 2008 | 06:16 AM
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thats correct your throwing the car in an open loop and you should see a po300 code which is a random miss fire. The rear O2's have no cause to the car running that way only the fronts. Although the rear will still throw the ses light till tuned out.
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Old Apr 29, 2008 | 06:31 AM
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you have to have the fronts...bottom line...fix it
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Old Apr 29, 2008 | 06:36 AM
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w/o o2s the PCM dumps fuel and runs constantly rich to aviod detonation. will it hurt the car? well, it might contaminate your oil w/ excess fuel but other than that you should be fine.
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Old Apr 29, 2008 | 07:10 AM
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lmk how that works out for ya
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Old Apr 29, 2008 | 10:04 AM
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Originally Posted by miller456
thats correct your throwing the car in an open loop and you should see a po300 code which is a random miss fire. The rear O2's have no cause to the car running that way only the fronts. Although the rear will still throw the ses light till tuned out.
i figured somthing like that, and i knew it would do somthing wierd, that was expected, im just the kinda guy that likes to understand why..... thanks for the input! like i said extensions and predater come in today and i live like 2 blocks from the shop. isnt lke i was crusin the town or anything.
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