UPDATE
Today, we gave the car a tune-up. Here's the list of things we did... Prepare to be boggled:
New spark plugs/wires
Removed, stripped, cleaned, and rebuilt engine
Cleaned air intake
Cleaned fuel intake system
New air and fuel filters
Adjusted and fixed annoying throttle cable problem
Added fuel injector cleaner
New to-do list:
Clean EGR
Clean IAC motor
Flush tranny
Flush coolant
The problem is not as bad, but still there. We're not sure if the to-do list will help, but we're tryin anyway. If anyone can come up with more troubleshooting ideas, let me know.
Thanks,
-Shifty