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

running rich?

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Old Feb 28, 2005 | 11:38 PM
  #1  
Top91Less's Avatar
Top91Less
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From: Long Island ny
Default running rich?

my exhaust smells of heavy gas odor, the stereo shop tech said as i was pullin out the bay....wow your car is running rich......what is the correction to this? is this a reason for bad gas mileage? easy fix????? my vette is a stock 91 conv.
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Old Feb 28, 2005 | 11:46 PM
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From: Redmond Wa
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It's probably a bad O2 sensor.

Does it start hard? This may be an indication of a stuck open injector or two. If it doesn't stsrt hard then my money is on the O2 sensor.
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Old Feb 28, 2005 | 11:58 PM
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go to Autozone or Poop Boys and have them dump your error codes. They should do it for free....don't buy any recommended parts from them...just report codes back here and let the experts analyize the data....
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Old Mar 1, 2005 | 12:06 AM
  #4  
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From: Redmond Wa
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Originally Posted by MikeC4
go to Autozone or Poop Boys and have them dump your error codes. They should do it for free....don't buy any recommended parts from them...just report codes back here and let the experts analyize the data....
Codes are a good thing to understand before you spend any real money. A code 45 is a rich condition being indicated by the O2 sensor but does not necessarily mean the O2 sensor is bad. MikeC4 is right. Get the codes first.
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Old Mar 1, 2005 | 01:40 AM
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From: Lahaina Hi
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If it's rich out the back, then the engine is LEAN.
Check vacuum behind the distributor or at the drivers front,evap can.
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Old Mar 1, 2005 | 08:01 AM
  #6  
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From: St Marys PA
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Originally Posted by REDC4CORVETTE
If it's rich out the back, then the engine is LEAN.
Check vacuum behind the distributor or at the drivers front,evap can.
How does that work?
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Old Mar 1, 2005 | 08:02 AM
  #7  
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From: St Marys PA
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Originally Posted by REDC4CORVETTE
If it's rich out the back, then the engine is LEAN.
Check vacuum behind the distributor or at the drivers front,evap can.
How does that work?

Check your O2, most likely the culpret.
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