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02-04-2013, 03:06 PM
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#1 |
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Registered User
Join Date: Sep 2010
Location: Anderson, SC
Posts: 325
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**SIGH** On to the next delima: lean problems!
so now im getting a p0171 and p0174 code thrown at me on the 02 burb. i see there are numerous possibilities of what this could be.
i've changed out the o2 sensor within the past 18 months so im not sold its that. i also see it could have something to do with the fuel pump/filter/etc. i will say that here recently if we let the gas get down to less then a quarter of a tank it seems harder and harder to start. to the point of 2 or 3 times last year it wouldn't start at all unless i put more gas in it. before i go and drop a lot of money into dropping the tank and replacing the pump, is there anything else that i should try before i hand it off to my mechanic? |
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02-04-2013, 08:41 PM
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#2 |
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Registered User
Join Date: Nov 2008
Location: manly iowa
Posts: 390
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Re: **SIGH** On to the next delima: lean problems!
Vacuum leak or incorrect readings from maf sensor, either from not working correctly or being dirty.
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02-05-2013, 09:06 AM
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#3 | |
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Registered User
Join Date: Sep 2010
Location: Anderson, SC
Posts: 325
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Re: **SIGH** On to the next delima: lean problems!
Quote:
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02-05-2013, 10:37 AM
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#4 |
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Registered User
Join Date: Jan 2013
Location: Kingfisher OK
Posts: 16
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Re: **SIGH** On to the next delima: lean problems!
Intake manifold gaskets
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02-05-2013, 11:24 AM
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#5 | |
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Registered User
Join Date: Sep 2010
Location: Anderson, SC
Posts: 325
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Re: **SIGH** On to the next delima: lean problems!
Quote:
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02-05-2013, 10:45 PM
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#6 |
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Registered User
Join Date: Nov 2008
Location: manly iowa
Posts: 390
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Re: **SIGH** On to the next delima: lean problems!
If its dirty it will give incorrect readings. I would try cleaning it first. 95% of the ones I see with both banks lean is usually dirty maf or vacuum leak.
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02-06-2013, 12:01 PM
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#7 | |
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Registered User
Join Date: Sep 2010
Location: Anderson, SC
Posts: 325
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Re: **SIGH** On to the next delima: lean problems!
Quote:
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02-06-2013, 05:27 PM
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#8 |
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Registered User
Join Date: Feb 2011
Location: belpre ohio
Posts: 78
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Re: **SIGH** On to the next delima: lean problems!
Had the same problem on my 03 sierra. Changed the intake gaskets cleanend the throttle body, and it runs good as new..
__________________
66 CHEVY STEPSIDE 2WD W/283 ( FAMILY HAND ME DOWN) 81 CHEVY SHORT BED 2WD W/250 4SPD TRANS STRAIGHT 6 ( CURRENTLY UNDER CONSTRUCTION) 01 SILVERADO SHORT BED 2WD W/4.3 5SPD TRANS ( DAILY DRIVER) Sold 03 SIERRA 4X4 STEP SIDE EXTRA CAB 5.3 AUTO( NEW DD) 09 CHEVY COBALT W2.2 AUTO (GF'S DAILY DRIVER) |
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02-06-2013, 07:43 PM
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#9 | |
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Registered User
Join Date: Nov 2011
Location: powhatan virginia
Posts: 402
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Re: **SIGH** On to the next delima: lean problems!
Quote:
__________________
1970 442 convertible 1970 Cutlass SX 1962 Chevy Stepside 2011 GMC 3500HD Crewcab SLT DRW |
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02-06-2013, 10:31 PM
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#10 |
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Registered User
Join Date: Mar 2008
Location: williamsport,pa
Posts: 329
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Re: **SIGH** On to the next delima: lean problems!
Change the fuel filter.
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02-17-2013, 12:41 AM
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#11 |
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Registered User
 
Join Date: Nov 2007
Location: Turlock California 95380
Posts: 2,075
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Re: **SIGH** On to the next delima: lean problems!
I had a truck at work with the exact same codes... I found a vacuum leak at the intake .. used brake clean to find the vacuum leak.. customer didnt approve the intake gaskets but I had snugged down the bolts and it really helped ... but that was just a band aid ... yours may be different ... another truck with the same codes had a tear after the MAF sensor before the throttle body... sometimes theyre easy sometimes not so easy
__________________
72 C20 Longbed 05 1500 Z71 |
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