p0175

Title says it all. The 97 GT I just bought a while back recently threw a rich code when driving, then developed a pulsing/surging in 5th gear at the same time. No matter if I clear the code, the pulsing/surging in 5th is always there, and idle randomly gets really rough. Code is p0175. Here's...

So I just bought a 1997 Mustang GT (After my 98 v6 got wrecked) and I've been going through minor problems here and there, which are mostly just rattles. However, on a drive home two or three days ago the check engine light came on and right around that same time, I noticed a small pulsing...