GaleForce's build

GaleForce

Took the Z to Toronto today. Boosted, broke necks, started making my ***-groove in the new leather seats, and threw a code. Also, I'm very happy with the new steering wheel, it kicks butt.

So the stronger springs keep the BOVs closed, but that didn't cure the idle problem.

Next I have to find my windows laptop, turn it on so it can spend a couple hours updating , then take it out the the garage to pull the code. No biggie, just annoying.

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jwick

What's the idle doing? Also what's the code?

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

GaleForce

I've had the idle issue since getting the tune. The car will lean out, want to stall, I usually give it a bit of gas to settle it down, otherwise the car will settle itself down. Sometime it will throw a code if it doesn't settle down fast enough. I don't remember the code off the top of my head (possibly MAF something or other), I'll hook the computer up tonight and get the code. The MAF are clean, so who knows.

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Luciano13

How does plunging into the ECU "update" your tune?? I have the same tuner but never understood this??
Not trying to be a smart azz.... Just trying to understand. I've heard this before but i don't know how it works

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http://www.the370z.com/members-370z-...lid-red-z.html

Mitco39

I have the exact same issue. I have been spending a bunch of time as of late tuning and playing with Uprev. Take a look in the Edmonton group (I believe your a member in there) under the mod discussion thread.

Anyways I believe its being caused by 2 things. The fact that the BP kit removes the PVC on the boost tubes, which is needed. But I also think its trying to activate some sort of emission operation that is causing the lean issue. There is something going on in the backend and the fact that your having the same issues as I mean that its not just something I inadvertently did. How is your idle when it is meeting or close to 14.7? Mine hunts, again I think its a byproduct of removing the emission systems but I dont see anyone else having these issues, or they are just living with the bit of a lopy idle.

This kind of relates to my rich lean bank thing that I got figured out. It is not a leak causing this issue, the ECU is directly causing this issue. It might also be related to the VVEL on the car. I will be spending some more time logging and playing with it this weekend I hope.

Also if you have the ability unplug your Post cat O2s if you notice the engine richening up at idle for no reason. This fixed that issue for me, but after tuning mine a few days ago I now have the lean out on idle.

If you figure it out before I get time to play with it let me know. haha

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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

GaleForce

I'm not sure what you are asking Lee. I'm not changing the tune, I have to update my PC laptop, which sits in a bag and is only brought out to log or clear codes. Says I have 71 updates, and it's refusing to update

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GaleForce

My idle bounces around. It will move from 13.5ish to 14.9ish, mostly staying in the mid 13-low 14 range.

I believe I had the lean bank code. Vince had said to clean the MAF. Made no difference.

I really thought it was the BOV staying open intermittently at idle. Oh well, it's kind of good to know someone else has the same issue.

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Mitco39

I have money on the post cat O2s. Sasha put both of them in one bank as your aware and they do have an effect on the engine and the tuning. Unplugging them and turning off the associated CELs and now mine idles around 14.5-14.9 give or take. If you check your long term trims that will give you a bit of a look at what the engine is doing. IIRC if your LTFTs get to 75% or 125% it will throw a rich or lean bank code respectfully.

As far as that right lean condition goes I am still trying to work through that one.

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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

jwick

I guess I'll chime in here too. If I follow your descriptions I'm having the same issue. It was much worse on my base map than it is on my tune but I specifically pointed it out to my tuner.

Best I can describe it is this. When I'm coming off closed loop conditions (i.e. just cruising) and pull up to a stop sign/light. The car will behave just fine and then I get a hiccup in the idle. Rpms drop a couple hundred and i lean out a bit (low 16s). It immediately catches itself and idles 'fine' after that. I quoted fine because the idle is decent but not rock solid like it was NA. It held steady N.A. and now it bounces within a 50 rpm range.

I'll give more details in a follow-up post but Is this similar to what are talking about?

Edit: idle Afr on my innovate is between 15.2-14.4

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build

GaleForce

Yes sounds very similar. My car will lean out to 17s sometimes higher before it corrects itself.

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GaleForce

Can I check the trims with Cipher? I haven't played around with the software much.

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Cell

I was getting this problem with the base map. Tuning fixed it.

Mitco39

Yeah you can check both the long term and short term trims.

Yeah mine does the same thing Ill lean out hard for a bit then it will catch itself. I am convinced its some emission operation that Uprev is unable to turn off at this point. More convinced now that 2 cars that were Pro Tuned are also having the same issue as myself.

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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

Mitco39

Who tuned your Z? Yours idles nice and smooth around 14.7? With no loping or leaning out? If yours is running uprev and thats the case then that just means I have to play with mine until I figure out what exactly is causing it on mine (and other cars).

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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

jwick

I'm also going for a retune again in the next few months. any feedback I could give my tuner might help. anybody willing to weld an O2 to the other header pipe, relocate and test your theory?

I'd volunteer but my entire crossover header pipe is header wrapped and it was a pita. I don't want to undue and reward for trial.

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'10 G37T 6MT Graphite/Graphite - BP - G37T Build