Recent content by I Drive A Mustang

Thanks for the info. I will try those things and post back if it doesn't help! Hope I've got it narrowed down now.

Hi guys, just signed up to get some help. My parent's 1998 Navigator is running TERRIBLE! The idle is so rough the entire car shakes and the rpms jump up and down, but when you give it gas it runs fine all the way through the powerband. We replaced the o2 sensors and are putting in a new fuel...