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Could I be running lean?

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Old Jul 29, 2008 | 02:42 AM
  #1  
fiveoformula's Avatar
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From: Orygun
Car: 1988 Formula Firebird
Engine: 5.3 LM4
Transmission: 4L65E
Axle/Gears: 3.42 True-Trac
Could I be running lean?

now im trying to get into prom tuning... reading all i can about it,
my question is, could my car be running lean or hurting anything if i don't have an air pump or EGR hooked up? i know these things can be tuned out but i don't have the means yet...
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Old Aug 7, 2008 | 03:30 AM
  #2  
DSmith's Avatar
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Joined: Mar 2004
Posts: 472
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From: Brandon Mississippi
Car: 1989 Camaro
Engine: 383
Transmission: 700R4
Axle/Gears: 3.73
Re: Could I be running lean?

I didn't run lean after removing the air pump and egr. I don't see where either would affect the afr but even if it did the o2 would pick up on it and the ecm would adjust.
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Old Aug 12, 2008 | 03:50 AM
  #3  
fiveoformula's Avatar
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Joined: Jul 2007
Posts: 240
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From: Orygun
Car: 1988 Formula Firebird
Engine: 5.3 LM4
Transmission: 4L65E
Axle/Gears: 3.42 True-Trac
Re: Could I be running lean?

even with mine being speed density TBI? will the ECM have enough adjustment?
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Old Aug 12, 2008 | 03:56 AM
  #4  
DSmith's Avatar
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Joined: Mar 2004
Posts: 472
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From: Brandon Mississippi
Car: 1989 Camaro
Engine: 383
Transmission: 700R4
Axle/Gears: 3.73
Re: Could I be running lean?

Nothing to worry about.
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