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  #1  
Old 01-18-2013, 08:41 AM
M0U35Y's_SS M0U35Y's_SS is offline
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i have the above code being thrown. it came up while the car sat in park for a few moments after a short drive. i have previously changed both upstream o2s with the acdelcos from amazon and the exhaust leak was repaired a few months prior. and it has an new egr valve and pcv. i haven't checked for vacuum leaks yet. anything else i should check for. i only have a basic scan tool so all i can see is trouble codes. also, what is the difference between lean and rich?
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96 impala ss
dd
137xxx and counting
home plate delete
all led interior/exterior, dakota digital fan relay thingy.
door trigger radio do dad, r1 concepts rotors, monroe sensatrack shocks all around.
euro smokes on the front alteza smokes on the rear.
ddm tuning hi/lo 5k H.ID.
garys cables with a duralast red top.
Glowshif trans temp, oil pressure and voltmeter.
interior lights and auto door lock/unlock.
recent tune up at about 130k
the more things change the more they stay the same
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  #2  
Old 01-23-2013, 10:57 AM
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Quote:
Originally Posted by M0U35Y's_SS View Post
also, what is the difference between lean and rich?
Usually Lean means too much air not enough fuel
Rich means too much fuel not enough air.


i get this confused... is Lean too much air, or is lean not enough fuel...

p0174 is bank 2 lean
i am chasing on my car too....


-ALF out....
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  #3  
Old 01-23-2013, 04:58 PM
M0U35Y's_SS M0U35Y's_SS is offline
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Could a constricted muffler cause this? This is frustrating new o2 sensors amd map clean maf. And checked for intake leakes. Maybe injectors mot flowing? How can i clean those?
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96 impala ss
dd
137xxx and counting
home plate delete
all led interior/exterior, dakota digital fan relay thingy.
door trigger radio do dad, r1 concepts rotors, monroe sensatrack shocks all around.
euro smokes on the front alteza smokes on the rear.
ddm tuning hi/lo 5k H.ID.
garys cables with a duralast red top.
Glowshif trans temp, oil pressure and voltmeter.
interior lights and auto door lock/unlock.
recent tune up at about 130k
the more things change the more they stay the same
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  #4  
Old 01-23-2013, 08:31 PM
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Since,I'm assuming you have some system scanning capacity. I would be curious if you carefully swap the left & right O2 sensors to see if the problem moves too. I know an exhaust leak can introduce this issue. A minor injector issue can create this condition. A compromised spark plug/wire should be ruled out as well. Use a decent fuel injector cleaner,and verify proper fuel pressure.
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Old 01-23-2013, 11:10 PM
M0U35Y's_SS M0U35Y's_SS is offline
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scanning meh, its a cheapo just to pull codes and see what emissions system are "on" uhm, yeah ill move the o2s around. i do notice during initial cold start i smell fuel from the passenger exhaust. also the motor runs much smoother until the pcm goes into closed loop. after closed loop it tends to behave more erratically. i am personally leaning injector side because of how long the car sat before i got it. not sure. i would like to clean/replace the injectors. but id rather clean if its cheaper. and i kniw my exhaust system is rather bad. both mufflers are almost rusted through. i can only imagine how bad the cats are. but when i get funds up im replacing the cats with something that flows better.
this problem did seem to coincidentally arise after i replaced my fpr. its a master pro? from orielys. and since i have replaced it i have had had problems starting it and now bank to running lean. i may swap the old (failed) regulator back in to see if my starting issue goes away. idk. i need to get a fuel pressure gauge i know. :P
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96 impala ss
dd
137xxx and counting
home plate delete
all led interior/exterior, dakota digital fan relay thingy.
door trigger radio do dad, r1 concepts rotors, monroe sensatrack shocks all around.
euro smokes on the front alteza smokes on the rear.
ddm tuning hi/lo 5k H.ID.
garys cables with a duralast red top.
Glowshif trans temp, oil pressure and voltmeter.
interior lights and auto door lock/unlock.
recent tune up at about 130k
the more things change the more they stay the same

Last edited by M0U35Y's_SS; 01-23-2013 at 11:18 PM.
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  #6  
Old 01-26-2013, 01:19 PM
M0U35Y's_SS M0U35Y's_SS is offline
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as far as cleaning or replacing injectors, what you guys take? im leaning towards cleaning with this...
OTC 7448 Fuel Injection Cleaner : Amazon.com : Automotive OTC 7448 Fuel Injection Cleaner : Amazon.com : Automotive
any other better ways?
also i want to remove the intake, clean all the gunk out and add an filter to the pcv vent to prevent future build up. any cleaners/methods of doing said task?
__________________

96 impala ss
dd
137xxx and counting
home plate delete
all led interior/exterior, dakota digital fan relay thingy.
door trigger radio do dad, r1 concepts rotors, monroe sensatrack shocks all around.
euro smokes on the front alteza smokes on the rear.
ddm tuning hi/lo 5k H.ID.
garys cables with a duralast red top.
Glowshif trans temp, oil pressure and voltmeter.
interior lights and auto door lock/unlock.
recent tune up at about 130k
the more things change the more they stay the same
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  #7  
Old 01-26-2013, 02:33 PM
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I use a quality fuel-injector cleaner (RedLine,or Chevron) in the fuel tank a couple times a year. I installed an oil/vapor separator in the PCV line. Filters quickly clog up,making them useless. I would consider removing the intake to have a shop clean it,if I was having the cylinder heads serviced. Otherwise,I'd leave well enough alone. I mounted the oil/vapor separator on the steering box. One line extends to the PCV,the other goes to the intake. Not a great picture,but the system is highly effective.
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Old 01-26-2013, 04:10 PM
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Quote:
Originally Posted by angelo View Post
Usually Lean means too much air not enough fuel
Rich means too much fuel not enough air.


i get this confused... is Lean too much air, or is lean not enough fuel...

p0174 is bank 2 lean
i am chasing on my car too....


-ALF out....
BOTH!

To the OP, make sure you have all of your exhaust manifold bolts and they are tight. Do you hear a spitting or tapping noise while the motor is cold and goes away when hot? If so, exhaust manifold leak of some sort, and this will cause the issue your having. Trust, but verify. you can unplug the o2's and see if the drivability symptoms, if there are any, go away. that would confirm an issue in that area. It will also set more codes, but wont allow closed loop feedback, and thus no fuel trimming. Kind of like a field svc mode. (overly simplified description)

Chris
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I really can't say for sure. Once the roofies kicked in she seemed calm and easy going.
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My first advice to you is to edit that and call me from a payphone.
94-95 Scan. Free well written diagnostic software
http://www.mediafire.com/?0elo4c935uc5s
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  #9  
Old 01-27-2013, 09:08 PM
M0U35Y's_SS M0U35Y's_SS is offline
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ok, im gonna try that after i swap o2s n see what happens. or doesn't happen. i went with some lucas injector cleaner. i do have a "tapping" and it does seem to be on the passenger side... but it never goes away. it sounds kinda like the sound my jeep made(4.7 dohc). i have inspected all visible portions of the manifold in question. but not under the heat shield. would it be wise to remove and inspect whats under the heat shield? or leave as is for the moment? i wouldn't imagine this would be a lifter would it?????
__________________

96 impala ss
dd
137xxx and counting
home plate delete
all led interior/exterior, dakota digital fan relay thingy.
door trigger radio do dad, r1 concepts rotors, monroe sensatrack shocks all around.
euro smokes on the front alteza smokes on the rear.
ddm tuning hi/lo 5k H.ID.
garys cables with a duralast red top.
Glowshif trans temp, oil pressure and voltmeter.
interior lights and auto door lock/unlock.
recent tune up at about 130k
the more things change the more they stay the same
Reply With Quote Quick reply to this message
  #10  
Old 01-27-2013, 09:40 PM
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I wouldn't bother with swapping o2's. Investigate the noise. I dont think it's a lifter. Look under the heat shield and look with a mirror for missing bolts.

Chris
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Quote:
Originally Posted by Goldmaster View Post
I really can't say for sure. Once the roofies kicked in she seemed calm and easy going.
Quote:
Originally Posted by Erik View Post
My first advice to you is to edit that and call me from a payphone.
94-95 Scan. Free well written diagnostic software
http://www.mediafire.com/?0elo4c935uc5s
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