LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Running Like Crap

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Old Apr 6, 2008 | 02:22 PM
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My 1993 z28 is due for a few things. I know i need to put new o2 sensors in but im starting to wonder maybe plugs to. See for the past 2 weeks id say she's been acting tempermental. Like i raced my buddy cutlass thats been built up a lil bit she didnt even spin the tires racing him from a dead stop wth i mean i still beat him by about a car or so. Now when i mash it from a dead stop itll spin but not much. My z28 has 149k miles on it an 60k on the motor which has been rebuilt. It even has a chip in it made by fastchip why is it doing this help me out or is it maybe just me. I mean ive had those days when it seems she's running top notch like no other then other days i feel my friends 01 eclipse would eat it. Could faulty o2 sensors really cause it to run this bad help me out

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Old Apr 6, 2008 | 05:32 PM
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come on help me out
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Old Apr 6, 2008 | 05:35 PM
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Need some more details. What exactly is it doing, when was the last tune-up, etc.
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Old Apr 6, 2008 | 05:40 PM
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it just recently had an oil change but nothing else far as i know. She's started to boug off the line an stuff but imean the motor was recently rebuilt like 2or 3yrs ago
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Old Apr 6, 2008 | 05:41 PM
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oh an the service light came on. So i took it to autozone an had them check the code, it came up as code 31 an 62 or 32 an 61 either way it was an egr computor malfunction an faulty oxygen sensor. Either way since then my cars just feels slow an powerless. but my egr has been removed or blocked off anyways

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Old Apr 6, 2008 | 05:48 PM
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hmmm. Last I heard autozone can only pull obd2 codes.
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Old Apr 6, 2008 | 05:50 PM
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whats obd2 mean
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Old Apr 6, 2008 | 06:01 PM
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On board diagnostic. 1993-1995 is 0bd1 and 1996-2002 is 0bd2.
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Old Apr 6, 2008 | 06:03 PM
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I havent had this car but like 2 months or so now an well. i just dont know . I mean she has power but i either cant belive shes been able to hook up or shes powerless anymore. We went down a freshly paved road omg this road would of made you cry it was so nicely done. we lined up i took off i didnt even spin wth. Could it be that just because im getting use to my car it doesnt excite or scare me as much as it use to. I mean i know what o2 sensors do but could the really cause my car to slow down so much. I should be happy i beat my friends car but its not running well i dont think

Last edited by Kmaroman; Apr 6, 2008 at 06:40 PM.
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Old Apr 6, 2008 | 06:09 PM
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I dont thing 2 months is long enough for you not to still be excited about your car. Does the car have any mods done to it?
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Old Apr 6, 2008 | 06:34 PM
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It has a chip, by fastchips in it, and a bm 6 speed short shift in it witha hurst handle thats all i know. I just dropped it off at the garage in town hopefully they get those old o2s out an maybe it'll be good agian.
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Old Apr 6, 2008 | 07:01 PM
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bump hopefully lt1 dan sees this agian
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Old Apr 6, 2008 | 07:06 PM
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Do you have 2:73 or 3:23 gears?
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Old Apr 6, 2008 | 07:07 PM
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i belive there 323 not for sure though
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Old Apr 8, 2008 | 01:18 PM
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they couldt pull the o2 sensor on the passenger side it to close to the manifold bolt up to the exhuast pipe.but the garage i took it to didnt have a thin wall enough socket to get to that o2 so im gonna take it to the chevy garage soon
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