C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

95 code"p" (lt1) running rich

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Old Aug 14, 2001 | 01:09 AM
  #1  
gottaspeed's Avatar
gottaspeed
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From: North Shore,Hi
Default 95 code"p" (lt1) running rich

when accelerating from dead stop more black smoke (fuel) than usual? I was thinking O2 sensors dirty? anyone? anyone?
:chevy
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Old Oct 20, 2011 | 04:25 AM
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flhx5241
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From: sparta tn
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id say that is correct.....my 95 done same thing scanned it and read maf and 02 sensor cleaned the maf really good and changed the 02 sensor and good as new
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Old Oct 20, 2011 | 04:21 PM
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Docderek05
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From: Providence RI
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I know this sounds lame, but my 1994 manual states to depress the go pedal in park or neutral per trans type, and rev for 2 minutes at 2000 rpm, as a remedy to clean up dirty 02 sensors...now..why a blast down the highway at 2800 rpm does not do the same thing..is beyond me, but I know if the 02's are not working right, a host of settings in the control module are effected, air/fuel ratio, etc. so probably time for either a wiring check, to the sensors, or worst case change em out, and its not a fun job, without a lift, and proper tools, heat, and something to hold your exhaust up as you try to remove the passenger side, I have fairly large hands, you will probably have to drop it down anyway, to get swing clearance to apply any leverage. Make sure you
re-coat the new ones with recommended never-seize.
Best to you, Derek
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