I have a '90 YJ that I just bought 3 days ago. I have the 2.5L TBI motor. Here is my problem.... It has been running great up until last night. A little sputter on the freeway but nothing to cause concern. Then.. I drove it up a steeper road at 4grand, turned a corner, was going to pull in my driveway and DEAD. Wont idle now once it is warm. Has a rough idle when cold.I took the cover off the throttle body and it was smoking as well.

Here is what I have done thus far: PCV valve seemed to be working, Air flow is good, Exhaust is not blowing any fun colors. About to go and get a new fuel filter and see what happens.

Any help would be great. Thanks.