My truck will run fine for about two or three days and then the SES light will come on and it will throw Fuel Trim Rich Bank 1 & 2 Codes and run like crap for about a day or two. It's been repeating this for about two weeks now and i just put new 02's in it about 3 months ago. So what could be causing this?
5.3L, 4L60E, True Dual Exhaust, 40 Series Flowmasters, K&N Cold Air Intake, Nelson Performance PCM, 93 Octane, 0% TM, Ram Air Hood, 35" Pro Comp X-Terrain's, 18" Mazzi Sphinx Wheels. 3000 stall Yank, TCI clutches, Trans-go Shift Kit. Soon To Come:
4.56's, Cam, PLT's
Bump
exhaust leak?
74 Austin Morris Mini 1000 - Daily Coil Spring conversion, lowered, Disc Brake conversion
FOR SALE: 04 RC/LB Duramax -12 second tow pig, built Allison, Tune, and supporting mods
FOR SALE: 03 Silverado SS -DBRods built 40X, DP, Suspension. Going for fast
Not even sure what year it is. It's a lot easier to help when there is a lot of info. If you have the vacuum referenced fuel pressure regulator check the vacuum port for a raw fuel leak. Low fuel pressure can actually cause rich codes when the pressure is not enough to allow the injectors to atomize the fuel. Check the pressure. A dirty or aftermarket MAF can do it too. Crappy aftermarket O2 sensors can lie.
That's all my guesses for now without a scan.
HTH
2006 Gmc Sierra 1500 z71 4wd. 5.3L vin T. bosch oxygen sensors and 6 month old stock MAF. anything else?
5.3L, 4L60E, True Dual Exhaust, 40 Series Flowmasters, K&N Cold Air Intake, Nelson Performance PCM, 93 Octane, 0% TM, Ram Air Hood, 35" Pro Comp X-Terrain's, 18" Mazzi Sphinx Wheels. 3000 stall Yank, TCI clutches, Trans-go Shift Kit. Soon To Come:
4.56's, Cam, PLT's
when this happens to me i jst go hammre on it and it goes away
THEY CALL ME G.
AZRAEL
2017 RZR 1000 2 SEATER
2023 RZR 1000 XP 4
2008 LTZ DURAMAX 3500
2023 300S 5.7
2023 BUICK ENCORE[/B]
The difference between winning and losing, is having a 2nd stage.
Drunk post, please disregard ROFL.Originally Posted by LamboDoNoMo
1969 Chevy RCLB C10 350/TH400 SOLD
2007 Chevy RCSB 4.8 4x4 LS SOLD
2008 Chevy RCSB 5.3 4x4 LT SOLD
2010 Chevy CCSB 6.2 4x4 LT SOLD
2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
2013 FORD CCSB F350 6.7 Powerstroke 4x4
you know it
THEY CALL ME G.
AZRAEL
2017 RZR 1000 2 SEATER
2023 RZR 1000 XP 4
2008 LTZ DURAMAX 3500
2023 300S 5.7
2023 BUICK ENCORE[/B]
The difference between winning and losing, is having a 2nd stage.
Lol. So nobody has any clue why it does this?
5.3L, 4L60E, True Dual Exhaust, 40 Series Flowmasters, K&N Cold Air Intake, Nelson Performance PCM, 93 Octane, 0% TM, Ram Air Hood, 35" Pro Comp X-Terrain's, 18" Mazzi Sphinx Wheels. 3000 stall Yank, TCI clutches, Trans-go Shift Kit. Soon To Come:
4.56's, Cam, PLT's
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