System lean then system rich !!
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System lean then system rich !!
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
!!!!!!
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
!!!!!!
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Joined: Jun 2003
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From: Las Cruces, NM
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?
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?
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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 !
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 !
Senior Member
True Car Nut
Joined: Jun 2003
Posts: 7,270
Likes: 465
From: Las Cruces, NM
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?
I am not sure what you mean by ticking though, is it possible to record a clip of the noise and post it?
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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?
I am not sure what you mean by ticking though, is it possible to record a clip of the noise and post it?
Only there is knock while pedal throttle
I will take around today and give u update
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