Join Date: Nov 2002
Location: SouthEastern PA
No, he didn't replace an EGR position sensor. The 89 doesn't have one. All there is is an EVR solenoid, an EGR valve, and a PFE transducer. His first post said he replaced the PFE transducer, although he called it an EGR sensor. So, all codes are gone now. A good sign.
Plus, he has a completely bad motor mount. That is almost certainly the cause of the problem.
I wouldn't spend any money on an EVR until I replaced the motor mounts and saw if the idle smoothed out. I think it will.
Owner, 1990 Thunderbird SC, white w/ gray cloth