Idle relearn / throttle body cleaning

[iboughtatahoe23]

Look for high negative fuel trims at idle.

What’s fuel trims? What’s it called ?

 

[swathdiver]

What’s fuel trims? What’s it called ?

In your scan tool, look for LTFTs, Long Term Fuel Trims.

 

[iboughtatahoe23]

Buddy is over right now, he’s cleaning the body and I’m holding the pedal open for him. Let’s see what happens guys.

 

[swathdiver]

Buddy is over right now, he’s cleaning the body and I’m holding the pedal open for him. Let’s see what happens guys.

Just unplug it and unbolt it so he can clean all around it.

 

[iboughtatahoe23]

Just unplug it and unbolt it so he can clean all around it.

Throttle body All cleaned up, and no issues.

However i noticed my transmission is overfilled slightly (buddy noticed it when he pulled the dipstick) and one of my lines from transmission has fluid on it. It doesn’t look fresh, which makes me think it’s either a tiny leak or a tech spilled fluid on the line at the dealership. And about the transmission Being over filled: I called and complained to the dealership who replace the fluids, and they said they would look at it for free

Here’s the photo of the lines and what’s on it.

 

[swathdiver]

Throttle body All cleaned up, and no issues.

However i noticed my transmission is overfilled slightly (buddy noticed it when he pulled the dipstick) and one of my lines from transmission has fluid on it. It doesn’t look fresh, which makes me think it’s either a tiny leak or a tech spilled fluid on the line at the dealership. And about the transmission Being over filled: I called and complained to the dealership who replace the fluids, and they said they would look at it for free

Here’s the photo of the lines and what’s on it. View attachment 400064View attachment 400065

The fluid has to be at 158-200 degrees to get an accurate reading on the full level on the dipstick. The cold reading between 80-90 gets you into the ballpark.

Yeah, those lines started sweating and then weeping a long time ago. Change them out, normal maintenance item.

 

[iboughtatahoe23]

The fluid has to be at 158-200 degrees to get an accurate reading on the full level on the dipstick. The cold reading between 80-90 gets you into the ballpark.

Yeah, those lines started sweating and then weeping a long time ago. Change them out, normal maintenance

Compared to something like the throttle body, How hard is it to do?

 

[iboughtatahoe23]

The fluid has to be at 158-200 degrees to get an accurate reading on the full level on the dipstick. The cold reading between 80-90 gets you into the ballpark.

Yeah, those lines started sweating and then weeping a long time ago. Change them out, normal maintenance item.

I’m sure there’s a diagrams somewhere, not exactly sure if it’s different types of lines or if it’s one assembly all together

 

[iboughtatahoe23]

@swathdiver forgot to tell you that after cleaning the TB the TPS went down to 15.3% from 18.6% at idle. I windy say significant from the numbers you were telling me . Anything else I can check?

 

[swathdiver]

Compared to something like the throttle body, How hard is it to do?

Replacing the lines is a lot more work but not complicated, tedious. You have to drop the front axle down on the passenger side and remove the lower shock bolts to get some clearance to get the lines through.

I’m sure there’s a diagrams somewhere, not exactly sure if it’s different types of lines or if it’s one assembly all together

Depends on whether or not you have the external transmission cooler.

@swathdiver forgot to tell you that after cleaning the TB the TPS went down to 15.3% from 18.6% at idle. I windy say significant from the numbers you were telling me . Anything else I can check?

That's a step in the right direction. It ought to come down some more as you drive it. If it stays high but drives fine, then that's the computer adjusting for a tired throttle body.