I actually didn't think they did Significantly within the bigport and smallport? I'd a S/T 20v at the time that hated daily life when it was disconnected.. I used to be gonna return the engine, but last but not least, Greg in the JJH crew talked me into retaining it, https://paxtonptwvy.blogvivi.com/27280966/the-basic-principles-of-toyota-4age-for-sale