87 CHRYSLER NEW YORKER 2.2 LTR 120,000. MILES IDLES ROUGH BUT RUNS GREAT WE CHECKED FUEL PRESSURE MAP SENSOR CHECKED FOR VACUUAM LEAKS AND CTS. IT HAD A BAD O2 SENSOR SO WE REPLACED IT BUT IT STILL HAS A VERY HIGH INJECTION PULSE. IT STAYS AT 2.2 MS AND RUNS G... Login to read more.