Idle Issue

theDreamer

I have had an idle issue for awhile where my RPMs at idle will drop down to 500 as if the car is about to stall out. Included with this is usually a CEL, P0174 (bank 2 too lean) after the RPMs drop a few times.

I have gone through and cleaned the MAFs, looked over for any intake leaks but have not found any. Need to get the bumper off and possibly check by the intercooler area. I went out today and logged the car with everything I could with Cipher and got the RPMs to drop. Attached a file, but you can see at 38 seconds the car freaks out and the RPMs just fall. If anyone can take a look and has some insight into this matter.

Dropbox download: https://www.dropbox.com/s/kqa8q4nnl9...2-56-17_PM.csv

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theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram

SPOHN

I don't like the lean factor at all being a FI kit but the idle issue seems to be a different issue (maybe). So some simple retuning is needed. I know getting idle correct is the hardest part. But something has had to make this just start now.

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Baer383

I got mine to idle @ 800 RPM plus or minus 13 RPM and A/F 14.4 to 14.8

But in order for this to happen I had to tune the MAF with Uprev in order to get the fuel comp table to be 100.

I'm not sure if this would help.

Plus I'm looking at your Cipher log and one thing I notice is your ECU is maxing out @ 125% meaning it is adding fuel and can't add any more.

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2013 ZL1

754 rwhp 747 rwtq

Baer383

The only thing in your log that I see weird is your timing goes to 20 when it should be about 5-9

And why are you logging everything under the sun?

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2013 ZL1

754 rwhp 747 rwtq

theDreamer

To find what is going on, rather just log it all (just data) and share it than someone come back & say it could be X but you did not log it.
I will see if I can get this by a shop here soon and get the tune checked.

__________________
theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram

Baer383

I was looking at it to see if I could help.

__________________
2013 ZL1

754 rwhp 747 rwtq

theDreamer

Thanks.
I figured it was just a tune thing, but wanted to make sure before I go by a shop & have them look at it and start charging me money with no idea what to do.

__________________
theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN
theDreamer's Silvia // URAS // GREDDY
Houston Zs // Facebook // Twitter // Instagram

Baer383

Mine did that until I tuned the MAF.

__________________
2013 ZL1

754 rwhp 747 rwtq