djamps, fancy looking at that log i posted? or if you did already, did you see anything else?

 

Andrei- Isn't your thermostat missing?

 

Yes I am not using it currently. This condition happens with or without a t-stat and the temp in 75-90 degrees without a t-stat is only cooler by 10-13 degrees F after warm up period.

 

So whats your fuel trim readings after it starts? If you can post your whole datastream at that point it would be cool.

 

I can log it tonight when I go home around 1AM. It will be cooler outside and the air will be denser so it will run slightly better than right now when it's 90 degrees outside so it wont be a "true" log.

I'll do a 3rd gear pull or 2 half way home. I don't like doing pulls when it runs bad because the exhaust is raspy and really annoying, dual 3". Sounds perfect when it runs normal.

I was lazy to log pulls only. First file has 1st and 2nd gear pulls and second file has 1 3rd gear pull. It was 76 degrees outside.
http://www7.zippyshare.com/v/8526585/file.html

 

Looking to buy an 02 sensor, bank 1 sensor 2

 

umm, wrong thread guy.

 

In my HR engine with Berks Kat (with foulers on O2 sensors) and UPREV tune i never had problems also at cruise speed, i made some logs for testing some months ago and A/F was as expected.

BUT i have to admit that never try to drive at the same speed for 50 km, in Italy is simply impossible also on highways....

And a 350Z is NOT made for cruise speed so...not a problem for me !

 

The Revup, HR and VHR don't have the problem discussed in this thread. And the driving conditions required to experience this problem are not really required, as I noticed. If you drive it under any conditions except the ones in the FSM to experience this problem, it will have this problem eventually anyway.

 

I still have not see a CEL or any problems from this.

It was also found that just hard WOT rev when stood still would trigger the lean/rich condition on one bank, if not the code. I still cannot do this, which i have to assume is good, for me at least.

Where is the guy who unplugged his rear sensors? i'm really interested in his results now he's done it for a few weeks.

 

djamps is correct. Today I welded on short .50" bungs and put the sensor directly in the exhaust stream, and plugged the longer Megan bungs. Ran perfect in less than 2 miles without a reset or clearing learned fuel trims. I'm expecting even more power with the stock tune, since the current tune was done with the non-foulers. And even more power once it's properly tuned.

This is what it looks like. I am pleased and satisfied now.

 

djamps for president!!!

 

Good stuff. How did we come to the conclusion this issue does no affect revups? I see HR guys say there aren't problems but who has a revup who can confirm?

 

I'd love to see a common occurrence, but remember it's not affecting mine either.

 

Could you confirm which ROM you're using? AC405 or AC406?

Also, it could matter what kind of antifouler you have... some are very long and some are short. Mine were short ones (about 1"). Maybe the long ones like on art pipes don't send the ECU a usable reading but short ones send a 'believable' but slightly wrong reading which the ECU makes corrections on.

 

So there is more of an impact than just closed loop operation.. looks like you could lose your cam control if you have rich/lean/o2 codes (not including catalyst codes of course)! This is a serious low/mid-range hit:

https://my350z.com/forum/tuning/5548...he-faults.html

 

Didn't someone else come in and dispute that theory? interesting though.


I will have to check which ROM, but agreed on the type of anti foulers, the ART's are long and curved, has to make a difference.

 

codes that could cause cam error are
P0171 P0174
P0172, P0175

at least from what I was told and have experienced. Hopefully my cipher cable comes tomorrow so I can test some.

 

Sorry, you're going to have to help me out here, i'm not seeing either of those two numbers, where am i looking for them?

 

I had it. Ran for over a year without problems with test pipes and 90 degree non-foulers. The Revup is really more of an HR than a DE. Right now one bung is leaking and I found it with Seafoam. Going to fix it tomorrow.