Lean code both banks after clutch replacement HELP

[robvas]

28-29% fuel is a lot to be adding. something is up.

With it being that high on banks 1 and 2 I would look towards the intake side not exhaust. massive vacuum leak or something.

did you clean the 02 sensors before you got the code? how did you 'clean' them anyway?

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[SheepDog]

Based on what I can see, Bank 1 long term fuel trim is between 1.18 and 1.25. Bank 1 short term is between 1.05 and 1.15. Bank 2 Long term is between 1.1 and 1.2. Short term Bank 2 is between 1.02 and 1.12.

The PCM is adding fuel, to try and compensate for a lean condition. These numbers are not what the O2 sensors are reading - they are the output of the PCM in response to a lean condtion.

You may have damaged the wiring/connectors to the Primary O2 sensors, or,

I think the more likely cause is that you created a vacuum leak somewhere. Maybe on the back side of the intake manifold where the IMRC actuators and vacuum pods are.

Start the engine and listen closely for any hissing type noise.

 

[Pistol_91]

Way too coincidental that it's lean after you changed clutch. Something got pinched.
The grille (depending on what grille) being changed paired with that intake can cause MAF turbulence but usually only at highway speeds and very minimal. Not something that would cause a lean condition at idle. Sheepdog is probably correct here.

 

[robvas]

I did reach out to them and sent a datalog in which they said “It’s lean by a lot” and “did you change anything?” and they were confident that it has nothing to do with the tune since I did not change anything that should affect airflow or fuel. I only changed clutch, slave cylinder, hydraulic line and the front upper grille. Attached is the fuel trims from the first datalog I did (before changing clutch and after getting the tune revised, no CEL) and one from after changing the clutch (the higher fuel trim and CEL)

Upload a good log and a bad log. The file, not screenshots.

 

[DevinN]

Upload a good log and a bad log. The file, not screenshots.

The files are current .csv, and I am able to send them in the forum. What should I convert them to so I am able to send them here?

 

[DevinN]

Way too coincidental that it's lean after you changed clutch. Something got pinched.
The grille (depending on what grille) being changed paired with that intake can cause MAF turbulence but usually only at highway speeds and very minimal. Not something that would cause a lean condition at idle. Sheepdog is probably correct here.

The PCM is adding fuel, to try and compensate for a lean condition. These numbers are not what the O2 sensors are reading - they are the output of the PCM in response to a lean condtion.

You may have damaged the wiring/connectors to the Primary O2 sensors, or,

I think the more likely cause is that you created a vacuum leak somewhere. Maybe on the back side of the intake manifold where the IMRC actuators and vacuum pods are.

Start the engine and listen closely for any hissing type noise.

I will look into the IMRC actuators and that area now. I was unfamiliar with those until looking them up now. I will get back with a response once I am done troubleshooting.

 

[DevinN]

28-29% fuel is a lot to be adding. something is up.

With it being that high on banks 1 and 2 I would look towards the intake side not exhaust. massive vacuum leak or something.

did you clean the 02 sensors before you got the code? how did you 'clean' them anyway?

I will be looking at the top side again soon. For the O2, I sprayed and wiped them off with MAF cleaner.

 

[robvas]

The files are current .csv, and I am able to send them in the forum. What should I convert them to so I am able to send them here?

Google drive or something?

not sure if they would work well on https://datazap.me/

 

[SheepDog]

I will look into the IMRC actuators and that area now. I was unfamiliar with those until looking them up now. I will get back with a response once I am done troubleshooting.

Another thing that could do this is if the tune does not have the correct diameter for your MAF housing (JLT)

 

[robvas]

If it drove great for 600 miles I can't see the tune being the issue

If you broke a wire somewhere I'd think you'd get a code for whatever sensor it's connected to

One nice things about having a boost gauge is it's also a vacuum gauge and you know right away when you're not getting the usual amount

 

[DevinN]

Google drive or something?

not sure if they would work well on https://datazap.me/

First log titled "logDMR2" is the last log I sent to Lund before they said the tune was all good. The second log titled "FixAttempt4" is a recent drive I just did. If there is a certain way of driving you would like me to do please let me know and I will do another log. https://datazap.me/u/devinn/logs/cmolxuf6v000bl706xcc548l7 https://datazap.me/u/devinn/logs/cmolxuepc0009l70689ab9aky

 

[DevinN]

If it drove great for 600 miles I can't see the tune being the issue

If you broke a wire somewhere I'd think you'd get a code for whatever sensor it's connected to

One nice things about having a boost gauge is it's also a vacuum gauge and you know right away when you're not getting the usual amount

I do have the vacuum gauge on the car. Do you know what the vacuum gauge should be at or what I should be watching for in terms of the vacuum gauge?

 

[Pistol_91]

You didn't accidentally flash the stock tune back on the car did you? Just curious.

 

[DevinN]

You didn't accidentally flash the stock tune back on the car did you? Just curious.

I’m extremely confident that I did not. I never plugged the tuning device into the car before I got the CEL.

 

[Pistol_91]

And it was running normal before the clutch change right? Or atleast that you are aware of? Very strange indeed.

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