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12-20-2015, 05:14 PM
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#1
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Join Date: Apr 2012
Location: brick nj
Posts: 12
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P0172, P0175
97 stock Z28, driving home today my car started idling REAL rough. CEL came on shortly after, when i got home i ran the codes and P0172 and P0175 both banks running rich. the car will not start unless the pedal is floored and even then it takes a few seconds longer to start plus you can smell raw gas. fpr not leaking fuel, LT fuel trims are staying at 0 and the ST trims are going as high as -37 on both banks, also the temp sensor is reading fine. evap, egr, and rear o2 have all been removed and tuned out for a few years now. anyone have any clues as to where to look next?
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12-20-2015, 05:47 PM
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#2
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Join Date: Dec 2008
Location: NNJ
Posts: 1,489
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I would start by testing the fuel pressure and O2 readings.
I had a similar problem running extremely rich, turned out front O2s were toasted and pcm saw very lean exhaust
__________________
1997 Camaro Z28 - 355 LT1, T56, CC503, LTs, ORY, Bald Eagle-back exhaust, !emissions, Lingenfelter CAI, EWP, !CAGS, BMR LCAs, UMI PHB, Koni Str.t/Koni SA, C5 Z06 front / LS1 F-body rear brake swap, factory hurst with short stick 
2014 2LT Cruze 2.0 Turbo Diesel
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02-09-2016, 06:14 PM
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#3
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What?
Join Date: Nov 2009
Posts: 411
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badd 02 sensors
I would replace both 02,
__________________
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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02-09-2016, 06:28 PM
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#4
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,342
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shazammmm
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02-09-2016, 06:29 PM
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#5
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^^^Lover of bad cars^^^ Meet Coordinator
Join Date: Aug 2007
Location: Whitehouse Station
Posts: 2,261
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Could be bad o2s. Try unplugging a front one see if it helps. Does the car run OK on a cold start?
__________________
1986 Honda VFR750 - 89.3HP to the wheel
2000 Trans Am M6 - Mods: Yes.
2018 Durango R/T - AFE Intake, JLT Catch Can, Stainless Works Catback, Vinyl Dodge Racing Stripes
2003 Toyota Matrix XRS M6 - Lol
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02-09-2016, 07:40 PM
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#6
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Join Date: Feb 2016
Posts: 692
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pull a plug and read it ? this is an old post tho hope you figured it out by now
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02-09-2016, 08:21 PM
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#7
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,342
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Sounds like the o2's are saying pull fuel? I would look elsewhere.
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02-09-2016, 09:01 PM
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#8
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^^^Lover of bad cars^^^ Meet Coordinator
Join Date: Aug 2007
Location: Whitehouse Station
Posts: 2,261
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god damnit chickenhawk bumping 2 month old posts lol
__________________
1986 Honda VFR750 - 89.3HP to the wheel
2000 Trans Am M6 - Mods: Yes.
2018 Durango R/T - AFE Intake, JLT Catch Can, Stainless Works Catback, Vinyl Dodge Racing Stripes
2003 Toyota Matrix XRS M6 - Lol
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02-10-2016, 07:30 AM
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#9
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Mongo the Meet Coordinator
Join Date: May 2008
Posts: 16,900
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Quote:
Originally Posted by ThoR294
god damnit chickenhawk bumping 2 month old posts lol
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bukk bukk warriorzzz
__________________
Quote:
Originally Posted by KirkEvil
repo bigals turd gen and part it out to a loving home
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02-10-2016, 11:56 AM
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#10
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What?
Join Date: Nov 2009
Posts: 411
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0r this?????
you mite have too move your 02 sensors, back a little,
__________________
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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02-10-2016, 11:59 AM
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#11
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,342
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Quote:
Originally Posted by chknhwk01
you mite have too move your 02 sensors, back a little,
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Like unscrew them back a little? About how far?
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02-10-2016, 10:14 PM
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#12
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What?
Join Date: Nov 2009
Posts: 411
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02 sensors
move them back about 7to10 ins... try that that mite work??
__________________
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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02-11-2016, 07:22 AM
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#13
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Meet Coordinator
Join Date: Jan 2008
Location: brick/pt. pleasant beach
Posts: 19,342
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buk buk playazzzz
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