Sounds like he is blowing smoe up your ass. I have never heard that in my life... Doesn't mean it's not happening. But i have never heard an intake screwing with your ABS.. Sounds like he just cleared your active DTC's, and waited for them to come back on again. But like i said, never heard of it.
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We can always choose to percieve things in life differently. It's important to focus more on what's right in life.. versus what is wrong.