hey, i know squat about the 4.6 anything. my buddy's got a Tbird, i picked up on things from him. i drive a mustang, but am looking at a 96 Cougar XR-7. 109k on it. he says it runs rough and he brought it to some mechanic and he says it might be the intake, which i know about. he also said that its leaking. what? i dont know. he said something about coolant. the guy was a sausage. i know its vague but what are your thoughts on this? my buddies 'bird had a bad intake, leaked coolant all over and they replaced under the warrenty. i wish i had more info. any help would be much appreciated, thanks.