Hello

I have tahoe 2010

New throttle

New map

Clean maf

I am suffeting from knock while idling .. system too lean

29 both bank

After 10 min system too rich -19 both bank !!!!!

I don know where is the problem

P0068 + p01012 + p0171-p0174

!!!!!!

What should the second code in your list be? You have an extra number in there.

Now i have only lean codes

But in live data .. system going lean then suddenly going rich !!!!

I ask again what the second code was, because it could be important.

The first code is very important, unless you already found and resolved the issue that caused it.

P0068 – Manifold absolute pressure (MAP) sensor/mass air flow (MAF) sensor/throttle position correlation
P0068 ? Manifold absolute pressure (MAP) sensor/mass air flow (MAF) sensor/throttle position correlation ? OBD2 Trouble Codes

This code sets when the MAF/MAP values are inconsistent with what is expected based on throttle input. I have seen MAF focused engines throw this code with a bad/dirty MAF sensor, or clogged catalytic converter. I have seen MAP focused engines throw this code with a massive vacuum leak. I have seen both throw it with a funky TPS.

There is a bigger issue, and the Lean/Rich codes are a side effect of it.

Are you able to scan live data, and how extensive is your mechanical knowledge of this particular platform?

Hello

I found today large leak in the down of throttle tube after the maf sensor

I am trying to close the gap and the lean problem solved !

Now i have only system rich .. all codes gone only system tich

Live data :-

STFT : -7

LTFT BANK1 +2: -20

Now i am gussing may injections problem or flow air mass faulty !

If you have just identified a massive vacuum leak, and corrected it, I could be wrong, but I am thinking it may take a bit for fuel trims to settle down. I am thinking to give it a couple of days and see what is happening then.

I am not sure what you mean by ticking though, is it possible to record a clip of the noise and post it?

No ticking ..

Only there is knock while pedal throttle

I will take around today and give u update

Still system rich bank 1 and bank 2

Live data LTFT -19

Fuel pressure : 49 engin on
59 ignition on