No. Just start up, sometimes. About 40% of the time.

Have you tried seafoaming the intake? They sell it at most auto parts stores....it brought some of my old cars back to life!

Dealership said the hfc's are causing the car to lean out.

Roy's Z - Did you ever resolve your P2A00 issue? I have been getting it after my CAT back system install (have G3 installed also) and it keeps coming back. Was having issues with this code previously after warranty engine replacement (oil consumption issue) and reinstallation of my G3, but thought is was resolved (dealer replaced A/F sensor 1, bank 1 and when code came back they replaced the exhaust manifold gaskets). Had no issue for several thousand miles, then just recently put on Cat back exhaust and the codes keep coming back. Looking for answers. May try the MAF cleaning. Not sure i was tracking with exactly how to do the by the book learning procedure above. Note that prior to the engine replacement I had the G3 installed for 6 months with no codes or issues at all.

Might be a MAF sensor on the blink, may need replacing. If you installed HFC's when you installed the catback exhaust, then you need a tune. Last, it may be an exhaust leak in the catback ( possibly a gasket) not being torqued down enough.:driving:

It appears that I am getting these codes due to the hfc's I have on the car. Dealership told me that my car is running 127% which is extremely rich! And also I noticed it while driving the same way I always do, a lss in mileage. I also tried cleaning maf's and it didn't help any. Im getting multiple random misfire along with the p2a00. All should be fixed after my tune In a few weeks.

So just as an fyi for myself. If I run a cbe, keep the cats and install a cai with no tune. Will I throw a cell? I know I shouldn’t be due to having the cats and have had other cars with this type of set up. But I’m reading a lot on the Z getting cells after G3's? Any insight would help.

IMO, the code happening after the air intake install doesn't necessarily mean the intakes are at fault. I personally think there's a small exhaust leak between the headers and HFCs that was small enough to not trip the code until the stillen kit was put on. The typical code for the stillen intakes is P0300 random cylinder misfire. Kind of weird that isn't happening here.

I personally experienced this issue and went through all the same troubleshooting. New hfc gaskets solved it:

http://www.the370z.com/intake-exhaus...testpipes.html

Had my wife step on the gas while I checked bare hand ed d and never felt a thing....I got the 300 code as well....oh well...tune will fix it.

I have gotten the 300 code as well after both the G3 install and the FI cat back system but it is not consistent, in fact very rare now, but the P2A00 is nearly a daily arrival.....reader shows the code pops up once, and when the ECU throws the code the 2nd time is when the light comes on.

Questions:

1. Will a tune fix the P2A00 code?
2. For the short term, should I be concerned that the P2A00 is the cause of the light (i.e: any engine damage concern due to the A/F mixture being beyond the cars allowable limits)?
3. If a tune is a recommendation, can any reputable shop do it? I don't have an UPREV tuner in area which is one I have seen folks refer to.

thanks in advance...

1. Will a tune fix the P2A00 code?
2. For the short term, should I be concerned that the P2A00 is the cause of the light (i.e: any engine damage concern due to the A/F mixture being beyond the cars allowable limits)?
3. If a tune is a recommendation, can any reputable shop do it? I don't have an UPREV tuner in area which is one I have seen folks refer to.
thanks in advance...[/QUOTE]

The tune itself will not fix the code, but it can be set to automatically clear.

I wouldn't be concerned with the A/F ratio. If you had headers in addition to the exhaust and intake, you'd be getting into "I better get a tune soon" territory.

I would call around to different shops to see if they have any experience with the Z. You can also ask around in your regional forum.

The tune itself will not fix the code, but it can be set to automatically clear.

I wouldn't be concerned with the A/F ratio. If you had headers in addition to the exhaust and intake, you'd be getting into "I better get a tune soon" territory.

I would call around to different shops to see if they have any experience with the Z. You can also ask around in your regional forum.[/QUOTE]


Thanks - seems weird that I only get the code on Bank 1 (passenger side) and not driver's side. Just makes me concerned that there is something wrong, but if there is, it is definitely not obvious (car runs great). Suppose I could check the exhaust manifold to cat. joint, just not an easy one to get to. Will also check with some local performance shops / and the regional forum.

Thanks man for fixing my formatting.

With you getting it on one side and not the other, to me, that really speaks of an exhaust leak at one cat that was small but passable until you put in the g3's. Regardless, best of luck.

Roy'sz - have you tried swapping the MAF's? If you are getting the P2A00 like me, then it is indicating an issue with the passenger side intake or exhaust....so to eliminate the MAF from a concern, just swap them and see if the code changes to the driver side, which i think would be a P2A03, I think? Just a thought to help troubleshoot your issue..:confused:

Brought this back from the dead for update. When I did my baseline dyno run at stillen the technician told me the car was leaned out pretty far. I was getting bad misfire's before tuning the car. I have ran the car almost a thousand miles and haven't gotten any of the codes due to the car being tuned and those codes being blocked.

Cheshire the tune WILL fix the lean/rich code because you are editing the afr tables that the car had prior to the tune, therefore being that the car is leaned out...adding fuel will get rid of the lean error code.

Markar, yes I did try swapping them and still the same problems as prior to tune. Also due to it being intermittent it could be leaning or riching out due to tempature and altitude adjustments. As you gain elevation the car will have less oxygen so it could lean out if you are doing some mountain driving? Also temp plays a big role in this as well.

Just decided to update you guys, thanks for the advice that was given. My sig shows the final pass in 5th gear....