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08-26-2023, 12:03 PM
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#1 |
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Registered User
Join Date: Sep 2009
Location: east tennessee
Posts: 158
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lean codes from HE**
Can anybody tell me how to cure lean codes Tried everything from swapping parts to smoke and everything anyone has told me for 4000 miles . Still get both codes every time I drive it .Could it be in the tune? Runs good no other codes in over 4000 miles.?????????????????????????????????????? 03 5.3 in a 3100.
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08-27-2023, 08:15 PM
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#2 |
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BMW & ASE Master Certified
Join Date: Feb 2004
Location: Houston, Texas
Posts: 1,255
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Re: lean codes from HE**
install wide band and verify. not sure how else to verify. A wide band is good to have anyway...
__________________
1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress |
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08-28-2023, 05:53 AM
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#3 |
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Registered User
Join Date: Mar 2015
Location: Manchester, CT
Posts: 429
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Re: lean codes from HE**
Have you checked your fuel pressure? Could be you have a dirty/clogged fuel filter. If that's the case, check your fuel tank, inside, for rust.
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08-28-2023, 08:07 AM
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#4 |
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Registered User
Join Date: Sep 2020
Location: Cleveland, Ohio
Posts: 478
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Re: lean codes from HE**
Could it be the location of your O2 sensors?
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08-28-2023, 10:37 AM
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#5 |
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Registered User
Join Date: Sep 2009
Location: east tennessee
Posts: 158
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Re: lean codes from HE**
Cannot find anyone with wideband. I am to old and dumb to learn, Fuel pressure is right new tank - fuel lines - filter - pump and FPR 02 sensors are in exhaust manifolds they are from early C5 corvette. THANKS
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08-28-2023, 11:23 AM
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#6 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,118
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Re: lean codes from HE**
Is it a flex fuel engine? Who tuned it?
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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08-28-2023, 01:12 PM
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#7 | |
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Senior Member
 
Join Date: Sep 2014
Location: Wenatchee, Wa
Posts: 897
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Re: lean codes from HE**
Quote:
https://www.summitracing.com/parts/avm-30-0300 If you don't weld an exhaust shop can install the bung for you. The hardest part of the whole install was figuring out how to route the wires. I ended up running the through an existing hole on the firewall next to the column. The gauge is easy to read and responds very quickly. Hope this helps! 
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08-28-2023, 02:16 PM
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#8 |
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Registered User
Join Date: Sep 2009
Location: east tennessee
Posts: 158
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Re: lean codes from HE**
Not flex fuel PSI harness Sent computer that came out of same avalanche as engine for PSI to delete vats I do not know if they changed the tune . LTFT stays at +25 most of the time Would an aftermarket tuner like a diablo fix it?
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08-28-2023, 06:32 PM
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#9 |
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Registered User
Join Date: Oct 2013
Location: Alabama
Posts: 1,206
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Re: lean codes from HE**
if your LTFT are at 25% then you got a serious lean issue that needs to be addressed in the tune. NO amount of hardware is going to fix that. It being that lean, I'm actually surprised you haven't already damaged the engine. A diablo-style tuner won't "fix" it, you need someone with HP Tuners to get into those type of changes.
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09-04-2023, 12:27 AM
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#10 |
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BMW & ASE Master Certified
Join Date: Feb 2004
Location: Houston, Texas
Posts: 1,255
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Re: lean codes from HE**
i had a buddy that had a crazy lean problem on a l83 swap.. i actually smoke tested his exhaust, found he forgot to weld the exhaust flange or o2 bungs in all the way..
it seems like you only have 2 options: Buy and learn how to use the wide band ... youtube will teach you... teaches everything practically or pay more money and have a shop do it for you.. will cost far more than 250$ forums can only help so much clint
__________________
1987 Silverado - L83 5.3 w/ 6L80e ,A/C,P/W,P/L,TILT, HID projectors, Wilwood C-10 Pro Spindles w/ 2018 silverado front brakes & C-5 Corvette Rear Disc Brakes 1999 BMW 528i - 5.7 LS1 w/ 4l60e, Ford 8.8 IRS w31 spline posi & FX-r projector retrofit New project: 2006 BMW x5 6cyl AWD to L83 6l80e 4wd to 2WD / RWD A poor man buy's it twice finally got my domain name back, 87chevy.com.... site rework in progress |
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09-07-2023, 09:05 AM
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#11 |
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Registered User
Join Date: Aug 2014
Location: Blue Ridge,GA
Posts: 508
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Re: lean codes from HE**
Im experiencing a similar issue currently. My tuner has found my injectors are not operating 100%. Ive recently replaced the injectors but we have not finished the fine tuning yet to see if issue is resolved. My injectors were nasty and partially clogged from sitting for years with ethanol in them.
__________________
1965 C10 LS2/4l70, WHITE, 5/7 DROP LINK TO SUPER SNOOPY C10 BUILD---> http://67-72chevytrucks.com/vboard/s...d.php?t=689283 1977 C10 SILVERADO HAWAIIAN BLUE, 5/5" DROP, LS6/4L80E 1976 CHEVY K5, 350/350, YUBA GOLD/SADDLE |
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