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03-31-2013, 01:05 PM
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#1
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Join Date: Dec 2009
Location: milltown
Posts: 1,497
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P0171
fix one thing now another...
so i got my car through isnpection and fix the catalyst deficency code with a magnaflow cat. i havent had a CEL for about 500miles and all my I/M sensors have checked so i know its not gonna just come back with the previous code. now just driving to my friends house last night the CEL comes on, ok i scan it and comes back with P0171, lean bank one but car is running fine.
just doing the bit of research online ive learned to check vacum lines for cracks, inspect MAF, change upstream o2s.
this is what has been done in past year as far as maintence and mods, k/n cold air (installed 4 months ago), new rear o2 (1 month isntalled), magnaflow highflow cat (1 month isntalled), new ac-delco factory spec plugs and wires (12months installed), pacesetter header (with an exhaust leak, installed 12 months). new oem fuel pump and filter (6 months). the car is a 02 camaro 3.8l with 98k miles. obviously checking vacum lines are easiest thing to do but what else should i look out for?
thanks for your help
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2002 Camaro Sunset Orange Mettalic, V6, 5spd, bilstein HD shocks and struts, eibach pro lowering kit, eibach f/r sway bars, lakewood PHB, UMI 2 point subframe connectors, energy suspensions poly master bushing kit
daily econobox and first car
1986 IROC-Z, T56, MGW shifter, Heads, Cam, Holley Stealth Ram 350, t-top, tubular LCA with relo brackets, adjustable PHB, belltech sway bars, ground control weight jacks, SLP mid length headers, 3in w/borla XR1, RIP 3 10 bolts, 12.7 @ 109 so far.. atleast its faster than stock  SOLD
1971 Camaro LS3/T56/9in, cam only and still carbed, RIP 2 10 bolts, 11.62@121
03 Blazer 2 door - salt sponge
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03-31-2013, 01:33 PM
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#2
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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What bank is the exhaust leak on? Could be sucking air in and causing your o2 to see more oxygen then itsould making it think its lean.
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01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
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03-31-2013, 01:42 PM
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#3
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Join Date: Dec 2009
Location: milltown
Posts: 1,497
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Quote:
Originally Posted by B4C
What bank is the exhaust leak on? Could be sucking air in and causing your o2 to see more oxygen then itsould making it think its lean.
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i know for sure it is leaking on the driver side where the EGR connects (i can see discoloration where exhaust gasses are coming out) but could also be leaking on passenger side as well, i cant really tell for sure. it has been leaking for a while now with no problems
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2002 Camaro Sunset Orange Mettalic, V6, 5spd, bilstein HD shocks and struts, eibach pro lowering kit, eibach f/r sway bars, lakewood PHB, UMI 2 point subframe connectors, energy suspensions poly master bushing kit
daily econobox and first car
1986 IROC-Z, T56, MGW shifter, Heads, Cam, Holley Stealth Ram 350, t-top, tubular LCA with relo brackets, adjustable PHB, belltech sway bars, ground control weight jacks, SLP mid length headers, 3in w/borla XR1, RIP 3 10 bolts, 12.7 @ 109 so far.. atleast its faster than stock SOLD
1971 Camaro LS3/T56/9in, cam only and still carbed, RIP 2 10 bolts, 11.62@121
03 Blazer 2 door - salt sponge
Last edited by redsoxsstink; 03-31-2013 at 01:43 PM.
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03-31-2013, 01:49 PM
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#4
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Join Date: May 2007
Location: Jim Thorpe PA
Posts: 2,132
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Look into that first. Could be the k&n but I would assume that it would affect both banks if the maf was contaminated
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01 SS 383 stroker, Magnum F, 9in.
86 Trans-Am 355 t56
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03-31-2013, 02:04 PM
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#5
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Join Date: Dec 2009
Location: milltown
Posts: 1,497
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Quote:
Originally Posted by B4C
Look into that first. Could be the k&n but I would assume that it would affect both banks if the maf was contaminated
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i thought that could be the problem too, but i have had it installed for a while now with no problems, i even let the filter dry before installing so any excess oil from the factory wouldnt contaminate the system.
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2002 Camaro Sunset Orange Mettalic, V6, 5spd, bilstein HD shocks and struts, eibach pro lowering kit, eibach f/r sway bars, lakewood PHB, UMI 2 point subframe connectors, energy suspensions poly master bushing kit
daily econobox and first car
1986 IROC-Z, T56, MGW shifter, Heads, Cam, Holley Stealth Ram 350, t-top, tubular LCA with relo brackets, adjustable PHB, belltech sway bars, ground control weight jacks, SLP mid length headers, 3in w/borla XR1, RIP 3 10 bolts, 12.7 @ 109 so far.. atleast its faster than stock SOLD
1971 Camaro LS3/T56/9in, cam only and still carbed, RIP 2 10 bolts, 11.62@121
03 Blazer 2 door - salt sponge
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03-31-2013, 03:52 PM
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#6
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What?
Join Date: Nov 2009
Posts: 411
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It could b this?
DRIVER,SIDE,02 SENSOR, HIS BADDDDDD????..... 
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YELLOW BULLET,WHER THE ''WEAK ARE EATEN''
STOP THE ''BITCH IN,  BAAAAD
BOOTS TO ASSSES, IF U CAN SMELLLLLLLLLLLLL,WHAT THUNDER IS-SPAYYYY-IN..  .. RIP, MIKE ROMEO..TUNE,BY DALE CHERRY,INJECTION-CONNECTION..""SHAZAMMMM""
THE FAMOUS ONE215-675-8515 ,AND STEVE SPOHN,and j&g-transmisstions,willow grove,pa,215-659-3022,, R.I.P.JOE PRINCE..
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04-01-2013, 07:21 AM
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#7
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,341
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You have an exhaust leak on the driver side upstream of your front o2? You found your problem. If its a small leak, the computer will compensate and compensate until it can no longer. Resetting the computer or disconnecting the battery will bring you back to factory fuel trims. I would correct the exhaust leak first before going any other direction.
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04-01-2013, 07:44 AM
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#8
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Join Date: Dec 2009
Location: milltown
Posts: 1,497
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CEL went off on my way to work
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2002 Camaro Sunset Orange Mettalic, V6, 5spd, bilstein HD shocks and struts, eibach pro lowering kit, eibach f/r sway bars, lakewood PHB, UMI 2 point subframe connectors, energy suspensions poly master bushing kit
daily econobox and first car
1986 IROC-Z, T56, MGW shifter, Heads, Cam, Holley Stealth Ram 350, t-top, tubular LCA with relo brackets, adjustable PHB, belltech sway bars, ground control weight jacks, SLP mid length headers, 3in w/borla XR1, RIP 3 10 bolts, 12.7 @ 109 so far.. atleast its faster than stock SOLD
1971 Camaro LS3/T56/9in, cam only and still carbed, RIP 2 10 bolts, 11.62@121
03 Blazer 2 door - salt sponge
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04-01-2013, 10:40 AM
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#9
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Ayatollah of Rock N Rolla / Admin
Join Date: Mar 2006
Location: Parts Unknown
Posts: 12,573
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Check fuel pressure? Maybe a bad FPR?
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