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02-04-2011, 07:12 PM
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#1 |
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Registered User
 
Join Date: Aug 2010
Location: Alta Loma, CA
Posts: 610
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Open header lean?
Anyone ever experience a lean code from running open headers? I have the DT headers and I am getting lean codes on both banks. I am thinking that this is from the O2 sensors being right at the end of the headers, making it see too much fresh air. What do you guys think?
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67 5.3L Build |
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02-04-2011, 09:32 PM
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#2 |
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Registered User
Join Date: Dec 2009
Location: lindale,tx
Posts: 2,373
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Re: Open header lean?
Sounds about right. I dont have a comp on mine but i would bet that is what the prob is. If you put your hand over the end of the headers when it is running they suck in betwen pulses. That would suck in fresh air.
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82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle |
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02-04-2011, 10:43 PM
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#3 |
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Registered User
Join Date: Aug 2010
Location: Alta Loma, CA
Posts: 610
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Re: Open header lean?
Thanks for the input. I will find out next week when I get my exhaust put on. I'm praying that's all it is.
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67 5.3L Build |
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02-04-2011, 10:58 PM
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#4 |
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Registered User
Join Date: Dec 2009
Location: lindale,tx
Posts: 2,373
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Re: Open header lean?
Not a problem. I just remeber that from when i had a bug and i thought it would be cool to try and blow a tiny paper out exhaust and it acctually sucked it in then blew it out seconds later.
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82 c10 5.3/4l60 84 c20 5.3/sm465 85 chevy k10 suburban LQ4/4l60 91 chevy c10 suburban Lsa 5.3/4l60 2017 Silverado whipple 5.3 1964 Vw beetle 1974 vw beetle |
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02-06-2011, 07:02 PM
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#5 |
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Registered User
Join Date: Jul 2010
Location: Sutton, MA
Posts: 130
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Re: Open header lean?
Definitely the problem, I have a small leak at my header flange where it meets up with the exhaust and it is throwing off my 02 readings.
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02-06-2011, 10:04 PM
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#6 | |
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Registered User
Join Date: Aug 2010
Location: Alta Loma, CA
Posts: 610
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Re: Open header lean?
Quote:
Posted via Mobile Device
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67 5.3L Build |
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02-16-2011, 06:45 AM
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#7 |
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Registered User
Join Date: Aug 2010
Location: Alta Loma, CA
Posts: 610
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Re: Open header lean?
I got my exhaust on and the lean codes went away. Hopefully others can learn from my lesson.
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67 5.3L Build |
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02-16-2011, 02:00 PM
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#8 |
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LSX addict
Join Date: Jun 2009
Location: Tyler, Texas
Posts: 262
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Re: Open header lean?
i remember guys having problems with this running open headers on Camaros when i had mine, sorry i was late! glad it was simple
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-1982 C10 SWB GMC Sierra [undergoing 6.0/4L80E swap with mild restoration] |
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02-20-2011, 11:58 PM
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#9 |
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Registered User
Join Date: Jan 2008
Location: Las Vegas, Nv
Posts: 954
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Re: Open header lean?
back-pressure
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http://67-72chevytrucks.com/vboard/s...54#post3194654 |
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