Throwing Codes =(
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From: Palatine IL
Throwing Codes =(
Hey guys I've had FLP long tube headers with high flow cats and with 4 tip borla stingers on the car. I've had them on for about 2 months noww a done some very long trips in the car. Anyways I'm throwing a 0430 HC I believe it was code. It just started poppping up now like every 15 minutes or so. Now it throws a 0430 HC and 0420 HC codes. I know these are the o2 sensors I believe on the passenger side bank, but is this occurs cause the o2's are bad or not? Also should I just switch over to 02 simms? Will that hurt my rwhp at all? Any advice or help on this guys would be appreciated... Thanks in advance :confused:
Drifting
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From: Memphis Tn
Re: Throwing Codes =( (Cobra Skinner)
PO420-TWC System Low Effeciency Bank 1-A
PO430-TWC System Low Effeciency Bank 2-A
It's in your intake system. Look up codes here; http://www.corvetteplanet.com
PO410 is intake system, 412 is AIR Solenoid Relay, 418 is AIR Pump Relay, etc.
Oxygen sensor codes are PO131 thru PO161, so it's not that.
[Modified by ScreaminDemon, 1:12 AM 6/2/2003]
PO430-TWC System Low Effeciency Bank 2-A
It's in your intake system. Look up codes here; http://www.corvetteplanet.com
PO410 is intake system, 412 is AIR Solenoid Relay, 418 is AIR Pump Relay, etc.
Oxygen sensor codes are PO131 thru PO161, so it's not that.
[Modified by ScreaminDemon, 1:12 AM 6/2/2003]
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From: Murphy TX
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Re: Throwing Codes =( (Cobra Skinner)
420 and 430 are the codes indicating low three-way catalytic converter efficiency, triggered by unexpected activity on the rear O2s. If it shows up on both (your are getting codes from both banks) it points at something like bad gas or the like. Check your cats, make sure they're okay. Has the exhaust sound or smell changed at all?
Cats other than OEM may have a different effect on the signal produced by the O2s as they may have different properties, but you should see something like all the other folks with the same setup. If they're not seeing codes, you shouldn't expect them either.
Cats other than OEM may have a different effect on the signal produced by the O2s as they may have different properties, but you should see something like all the other folks with the same setup. If they're not seeing codes, you shouldn't expect them either.
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From: Palatine IL
Re: Throwing Codes =( (ToplessTexan)
So which one is it? Is it the intake or the rear 02's. I have just switched over to a vortex intake but everything seems to function properly with it. I have high flow cats on the car, this is part of the FLP system... If these new cats are the reason the codes are being thrown would a set of 02 simms fix the problem and not hurt my hp? I'm really worried about loosing HP since this is the reason why I did a full intake w/ bride and full exhaust system.
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From: Murphy TX
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Re: Throwing Codes =( (Cobra Skinner)
There are other codes that indicate whether or not the O2 are functioning properly. You're not seeing those which suggests that their output is valid. What they're telling you is that the converter is not operating as expected. That may or may not be true. If you just pop on sims, all you'll be doing is ignoring the condition. (I am also very likely in the minority in that I am convinced that rear O2s do influence fuel trimming.)
The thing to look for is something that will affect both banks since you're seeing codes on both sides. I have a hard time believing changing an intake will cause this. Much more likely to be bad gas, race gas, dead cats due to running rich, etc. If it were me I would try to log all four O2 sensors and go from there based on what the data told me.
The thing to look for is something that will affect both banks since you're seeing codes on both sides. I have a hard time believing changing an intake will cause this. Much more likely to be bad gas, race gas, dead cats due to running rich, etc. If it were me I would try to log all four O2 sensors and go from there based on what the data told me.
Drifting
Joined: Sep 2001
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From: Memphis Tn
Re: Throwing Codes =( (Cobra Skinner)
I have the 02 simms, and they will stop you from throwing codes from your rear sensors. If your throwing these codes, I don't see why your not throwing any heated oxygen sensor or even any emissions codes if it is your cat sensors. Wish I knew more, you need to ask C5tech, he knows all!!!!!
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From: Palatine IL
Re: Throwing Codes =( (ScreaminDemon)
Ok the thing is i haven't run race gas and have had this for a few full tanks of gas now. The system has only been on my car for about a 1000 miles or so and barely throws the codes. Most of the time 0430 is being thrown but once in a while the 0420 and 0430 come up together. Did you means run autotap and see what the 02s are saying?
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From: Murphy TX
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Re: Throwing Codes =( (Cobra Skinner)
Yes.
You might also do a search for posts by other folks that have had similar problems with their FLP setup.
[Modified by ToplessTexan, 8:00 AM 6/3/2003]
You might also do a search for posts by other folks that have had similar problems with their FLP setup.
[Modified by ToplessTexan, 8:00 AM 6/3/2003]
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From: Murphy TX
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Re: Throwing Codes =( (ScreaminDemon)
I have the 02 simms, and they will stop you from throwing codes from your rear sensors. If your throwing these codes, I don't see why your not throwing any heated oxygen sensor or even any emissions codes if it is your cat sensors. Wish I knew more, you need to ask C5tech, he knows all!!!!!
He's not throwing codes indicating the O2 sensors are inoperative. He's throwing codes indicating that these properly operating O2 sensors are reporting more activity than is expected. The PCM has interpreted that as an inefficient converter and thrown the relevant codes.
The question is why. The converters either a) do not behave enough like the OEM units to keep the PCM happy or b) are not performing adequately. I would expect the codes to have begun almost immediately after install if it's a) otherwise I'd lean toward b).
Drifting
Joined: Sep 2001
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From: Memphis Tn
Re: Throwing Codes =( (ToplessTexan)
Well, I wonder if his pcm is leaning out or making it run rich due to the new intake/MAF,etc, or just misreading,which in turn should give bad emissions? Would high flow cats still clean this up if performing properly? :confused:
What brand of premium do you run?
[Modified by ScreaminDemon, 10:35 PM 6/3/2003]
What brand of premium do you run?
[Modified by ScreaminDemon, 10:35 PM 6/3/2003]
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From: Palatine IL
Re: Throwing Codes =( (ScreaminDemon)
I usually run Mobil 93 octane... I just went to the track today and ran a best of a 12.664 and high mph at 116.7... Traction was an issue since it was only 58 degrees out. What do you think? I think it should hit low 12's with this setup??
Drifting
Joined: Sep 2001
Posts: 1,421
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From: Memphis Tn
Re: Throwing Codes =( (Cobra Skinner)
I bet traction was a big issue being 58 degrees out and running on stock tires. Some BFG drags should fix you up. There are however too many variables to guess what you should be running though. Have you talked about your code problem with your high-flow cat vendor?
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From: Palatine IL
Re: Throwing Codes =( (ScreaminDemon)
No but I think I will tommorrow, it's FLP's system with there high flow cats whoever they use... I'm getting a cam installed on the Z with them scheduled on the 5th but I think I will push that back till I find out whats going on with my 4th gear and this code. :(
