OK, 2003 Tahoe, 101,000 mile 5.3 flex
Codes:
P0101B (MAF)
P0300B (Misfire)
P0171B (Bank 1 fuel trim lean)
P0174B (Bank 2 fuel trim lean)
Flashing engine light, restarted and it went off. Dirty MAF?
S.C.
OK, 2003 Tahoe, 101,000 mile 5.3 flex
Codes:
P0101B (MAF)
P0300B (Misfire)
P0171B (Bank 1 fuel trim lean)
P0174B (Bank 2 fuel trim lean)
Flashing engine light, restarted and it went off. Dirty MAF?
S.C.
Gone, but not forgotten!
Id start with cleanin th Maf with some crc Maf cleaner.
2000 Silverado ECSB- 5.3 CAI, Pacesetter LTs, ORY- Pipe, Magnaflow XL, E-fan, Ported T/B , Nelson Tuned, Built 4l60e, Circle D Stall, 3.42s G80, 2-4 Drop, Hertz Highs, Rockford 501s
2004 Buell XB12s
Originally Posted by LamboDoNoMo
A dirty MAF won't cause misfires or a flashing SES light. You have a more serious problem. Does the truck still have the factory catalytic converters? If so, better have them checked.
Truck is 101% stock. Plugs, wires, cats, etc are all stock. Only oil & filter changes as required.
It was missing out during a cold (cold for Texas) start @ about 28 degrees. Sounded like it had a nasty cam; gave it some gas & it cleared up.
Gone, but not forgotten!
put some new plugs in it, clean the MAF, make sure your plug wires are good. no popped fuses. Clear the DTC's then see what happens
2005 GMC RST *sold
2006 Silverado SS with nawz
sound like cats ,i just went through hell ,finding this out on my escylade
mods:2004 sierra ext sb,20s ,big brake kit w,hawk pads,air bagged,2006 6.0 lq4 swap,vortec supercharged10psi, air to water intercooled w/ dual electric fans on it ,snow meth injection kit,60lbers, e-fans ,big radiator swap ,cam 218 /222 548/550 comp .hardened prs .1.85 comp roller rockers ,guideplates ,crane double springs,trans 4l65e built .pacesetter l/ts true duals w/x pipe and magnaflows,14 bolt rearend swap ,3.73s,aroemotive fuel pump system w/elec.fuel controller and bypass regulator a/n fittings, taylor 10.5s interceptor gauge,aem w/b a/f ,autometer boost/vac NELSON 93 OCTANE TUNED .
What they said or a vacuum leak. Maybe.
Yeah, flashing SES due to the misfire means the cats are taking a beating.
2013 CC 5.3
81 C10 LS1 project
plugwires!
LOL
Nothing like a unanimous opinion.
Thanks for the responses.
Gone, but not forgotten!
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