Starts up fine and runs without problems for awhile, but after driving for 30minutes or so, the idle drops low and gets almost violent-like. I pulled into the garage last night and it looked like a virating bed.

 

does it pulse, or just idle really rough?

 

Pulsing.

 

We had a long thread about that 2 weeks ago. Seems it's a common problem once the solenoids go, and costs about $250 to fix if you buy the parts new.

 

Thank you. I'll take a look around for it.