2011 Chevrolet Traverse 201500km automatic transmission
I recently cleaned my throttle body. Unbolted it and removed it then cleaned it. I reused the tb gasket. I'm now reading I should have replace it? Is this true? And how do I put it on correctly?
My ltft are now reading 7 to 10% on idle and normalizes when I drive.
Pre TB cleaning LTFT values were closer to zero, +/3% on idle. I can feel a very subtle shake that I didn't pre tb cleaning
Never re-use gaskets unless they are specifically designed for it.
Most gaskets for anything are usually one use only. It should have been replaced as @chucktobias pointed out.
A lot of times, new gaskets don't come with the new part or are not available. Auto parts stores sell sheets of gasket material that I keep around for just such occasions.