P2A00 - A/F Sensor Circuit Range/Performance (bank 1 sensor 1)

jwick · 10-08-2014, 09:33 AM

Quote:

Originally Posted by Mitco39

The trick here is allowing the crankcase to vent to atm while at the same time keeping boost out of there. Ideally you want a bit of a vacuum at all times in the crankcase. But when you go boosted this stops happening under WOT as your manifold pressure is no longer below atm. This means that you cannot tap into the intake as you could under NA without some sort of metering system to keep the pressure of the crankcase at or below atm.

What you really need is a vac pump. because under WOT you don't have a vac source. At idle things are fine because of your throttle bodies. WOT in a NA car still has a marginal vacuum in the intake runners just due to the pressure differential between your air filters and the combustion chamber.

Its hard because for every idea that comes up there is a reason why its not going to work.

And this is why we all still have a stumble issue at idle.

MyKindaGuise · 10-08-2014, 09:36 AM

Quote:

Originally Posted by jwick

Are you running the VSR kit?

No. Its all custom and a headache!

Quote:

Originally Posted by Mitco39

The trick here is allowing the crankcase to vent to atm while at the same time keeping boost out of there. Ideally you want a bit of a vacuum at all times in the crankcase. But when you go boosted this stops happening under WOT as your manifold pressure is no longer below atm. This means that you cannot tap into the intake as you could under NA without some sort of metering system to keep the pressure of the crankcase at or below atm.

What you really need is a vac pump. because under WOT you don't have a vac source. At idle things are fine because of your throttle bodies. WOT in a NA car still has a marginal vacuum in the intake runners just due to the pressure differential between your air filters and the combustion chamber.

Its hard because for every idea that comes up there is a reason why its not going to work.

I probably dont have a complete understanding of a CCE system but it plumbs into your downpipe or header collector for NA. So wouldnt that techinically be vent to atmosphere? This would avoid running it into your intake side and also avoid being fully open and making a mess in the engine bay. I get what youre saying about keeping boost out of there though.

Also found some info on vaccum pumps if that is a more preferred route
Electric vacuum pump - Yellow Bullet Forums

I have this right now but I have not implemented it into my setup yet.
http://www.summitracing.com/parts/SUM-120108/?rtype=10

Im just spitballing ideas here.

Mitco39 · 10-08-2014, 12:43 PM

Quote:

Originally Posted by MyKindaGuise

No. Its all custom and a headache!

I probably dont have a complete understanding of a CCE system but it plumbs into your downpipe or header collector for NA. So wouldnt that techinically be vent to atmosphere? This would avoid running it into your intake side and also avoid being fully open and making a mess in the engine bay. I get what youre saying about keeping boost out of there though.

Also found some info on vaccum pumps if that is a more preferred route
Electric vacuum pump - Yellow Bullet Forums

I have this right now but I have not implemented it into my setup yet.
http://www.summitracing.com/parts/SUM-120108/?rtype=10

Im just spitballing ideas here.

The vac pump could work although the way our system is setup something would have to be done with that PCV line that goes to the stock resonator boxes on our cars. With that left open to atm air would just get sucked in through there as it is when the car is idling. I drew it up for Jwick back in that thread he posted on here to make more sense of it.

SouthArk370Z · 10-08-2014, 12:49 PM

Can't you just run a hose to the supercharger inlet? Depending on the inlet plumbing, you might not have a lot of vacuum but it should always be below atmospheric. YMMV

Mitco39 · 10-08-2014, 12:53 PM

You could and as long as its post MAF you should be fine. Its us turbo guys with the filters stuck right on the compressor housing that have a bit of an issue.

SouthArk370Z · 10-08-2014, 01:02 PM

Quote:

Originally Posted by Mitco39

You could and as long as its post MAF you should be fine. Its us turbo guys with the filters stuck right on the compressor housing that have a bit of an issue.

Ah. Thanks for clearing that up for me.

Spec Jay · 06-08-2015, 07:38 PM

Anything come out of this aside from changing the random misfire sensitivity?
mine has been throwing p2a00 here and there usually in the same conditions.

might just have it disabled. long term fuel trims have been spot on.

Mitco39 · 06-09-2015, 12:13 AM

Disabled with 0 issues in a very long time.

gomer_110 · 06-09-2015, 06:43 AM

Quote:

Originally Posted by Mitco39

Disabled with 0 issues in a very long time.

Same here.

Ill · 06-10-2015, 12:44 PM

Is disabling the code something we would be able to do with cipher? I have had to reset the code about 6ish times since I've had my car back in my possession, since early October. My tuner is across the country so taking it to them is unrealistic.

gomer_110 · 06-10-2015, 01:02 PM

It can't be done in cipher. It must be done in the actual tune.

Ill · 06-10-2015, 01:30 PM

Looks like I'll just have to keep erasing the code for now.

Thanks for the clarification.

Nismodean · 06-10-2015, 02:18 PM

I've been having this issue for quite some time, bank 1 sensor 1 P2A00 code with random misfire (reset it multiple times and it comes back) and the RPM dip when I come to a stop. So either I pay $700 for two wideband o2 sensors and hope that clears the code issues or pay ~$600 for an uprev tune that also removes that code detection along with a mild tune for FI LTH and exhaust?

Spec Jay · 06-10-2015, 02:59 PM

Check your long term fuel for bank 1 if they're not completely out of whack I'd go ahead and get tuned and delete the codes

Sent from my SAMSUNG-SM-G900A using Tapatalk

Nismodean · 06-11-2015, 01:58 PM

Are you referring to the duty cycle of the injectors to see if they're all pumping out fuel properly or the pre-cat wideband o2 sensor checks?

10-08-2014, 12:49 PM	#49 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	Can't you just run a hose to the supercharger inlet? Depending on the inlet plumbing, you might not have a lot of vacuum but it should always be below atmospheric. YMMV __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

10-08-2014, 12:53 PM	#50 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 131	You could and as long as its post MAF you should be fine. Its us turbo guys with the filters stuck right on the compressor housing that have a bit of an issue. SouthArk370Z and jwick like this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

06-08-2015, 07:38 PM	#52 (permalink)
Spec Jay A True Z Fanatic Join Date: Apr 2009 Location: Bummerton Posts: 1,510 Drives: MtB 09 370z Rep Power: 19	Anything come out of this aside from changing the random misfire sensitivity? mine has been throwing p2a00 here and there usually in the same conditions. might just have it disabled. long term fuel trims have been spot on. __________________ 09 Monterey Blue Global Time Attack Street Class Build Build Thread:Saber! Instagram:@SpecJay

06-09-2015, 12:13 AM	#53 (permalink)
Mitco39 A True Z Fanatic Join Date: Aug 2012 Location: Edmonton Alberta Canada Posts: 2,089 Drives: 40th 370z Rep Power: 131	Disabled with 0 issues in a very long time. Spec Jay likes this. __________________ 2007 Chevy Duramax - EFILive Tuned By Me 2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her My Build --> http://www.the370z.com/members-370z-...39s-build.html

06-10-2015, 12:44 PM	#55 (permalink)
Ill Base Member Join Date: Mar 2012 Location: Bellevue Posts: 177 Drives: 09 370z Base 6MT Rep Power: 13	Is disabling the code something we would be able to do with cipher? I have had to reset the code about 6ish times since I've had my car back in my possession, since early October. My tuner is across the country so taking it to them is unrealistic. __________________ Old - GTM TT Stage 1 - 487whp / 415wtrq - bunch of goodies. New - 2011 Shelby GT500 - 2.3L VMP TVS - JLT CAI.

06-10-2015, 01:02 PM	#56 (permalink)
gomer_110 A True Z Fanatic Join Date: Aug 2011 Location: Perrysburg, OH Posts: 17,992 Drives: '11 Nismo #528 GM Rep Power: 36940	It can't be done in cipher. It must be done in the actual tune. __________________ '11 370Z Nismo #528 Fast Intentions \| Stillen \| Motordyne \| Uprev \| CSF \| Zspeed \| Z1 Motorsports \| AST \| Swift \| SPC \| SPL \| Whiteline \| Hotchkis \| Bride \| Schroth \| Robispec \| Cusco \| Nismo \| Volk \| Forgestar \| Hoosier \| RJM '17 Titan Bone Stock

06-10-2015, 01:30 PM	#57 (permalink)
Ill Base Member Join Date: Mar 2012 Location: Bellevue Posts: 177 Drives: 09 370z Base 6MT Rep Power: 13	Looks like I'll just have to keep erasing the code for now. Thanks for the clarification. __________________ Old - GTM TT Stage 1 - 487whp / 415wtrq - bunch of goodies. New - 2011 Shelby GT500 - 2.3L VMP TVS - JLT CAI.

06-10-2015, 02:18 PM	#58 (permalink)
Nismodean Enthusiast Member Join Date: Oct 2010 Location: Washington Posts: 313 Drives: 2009 RIP Now 2012 Rep Power: 14	I've been having this issue for quite some time, bank 1 sensor 1 P2A00 code with random misfire (reset it multiple times and it comes back) and the RPM dip when I come to a stop. So either I pay $700 for two wideband o2 sensors and hope that clears the code issues or pay ~$600 for an uprev tune that also removes that code detection along with a mild tune for FI LTH and exhaust? __________________ The Truth, it hurts sometimes. FI LTH & FI CF CBE. This is a 370Z forum, if I want to fling poo at another brand of car and your feelings get hurt, then you're hanging out in the wrong forum (cry elsewhere).

06-10-2015, 02:59 PM	#59 (permalink)
Spec Jay A True Z Fanatic Join Date: Apr 2009 Location: Bummerton Posts: 1,510 Drives: MtB 09 370z Rep Power: 19	Check your long term fuel for bank 1 if they're not completely out of whack I'd go ahead and get tuned and delete the codes Sent from my SAMSUNG-SM-G900A using Tapatalk __________________ 09 Monterey Blue Global Time Attack Street Class Build Build Thread:Saber! Instagram:@SpecJay

06-11-2015, 01:58 PM	#60 (permalink)
Nismodean Enthusiast Member Join Date: Oct 2010 Location: Washington Posts: 313 Drives: 2009 RIP Now 2012 Rep Power: 14	Are you referring to the duty cycle of the injectors to see if they're all pumping out fuel properly or the pre-cat wideband o2 sensor checks? __________________ The Truth, it hurts sometimes. FI LTH & FI CF CBE. This is a 370Z forum, if I want to fling poo at another brand of car and your feelings get hurt, then you're hanging out in the wrong forum (cry elsewhere).

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