after engine reaches operating temp. starts running rich and rough,

temp sensor on scanner reads high of 210 low of 195. car runs great when dead cold.short term trim 1 4.6% trim 2 4.6% - throtle pos 19%

I think i would try MAF even though it ckecked ok. Check fuel status for open loop after engine warm also.Were these readings at closed throttle?

fuel system 1 open loop (det). throttle 19% this was the reading on scanner with foot off gas could this be it?

TPS OUT OF RANGE FOR CLOSED THROTTLLE. DOES SYSTEM GO CLOSED LOOP THEN BACK TO OPEN LOOP AFTER ENG. WARMED UP TO OPER. TEMP? WHAT WERE THE CODES WHEN YOU STARTED WORKING ON CAR? DID SOMEONE CLEAR CODES? WHY DO YOU SAY RUNS RICH,BLACK SMOKE FROM T-PIPE? OR DOES IT JUST SOUND LIKE IT IS RUNNING RICH? HOW WAS MAF CHECKED? HARD TO DIAG. ONLINE. RUN GOOD AT SPEED? OR JUST ROUGH IDLE. STILL LEANING TOWARD MAF. LET ME KNOW HOW IT COMES OUT.

replaced maf sensor, tps, iac, removed and cleaned throttle body,removed and cleaned egr. when engine reaches around 170 degrees starts running rough and rich(black smoke from tailpipe). code reader says "open loop (det) 02" at 205 degrees. the hotter it gets the worse it runs. when it first starts cold it runs great. new tps reads 18% HELP!

PULL HOSE OFF FUEL PRESS. REG.(ENG. OFF) SEE IF FUEL IN HOSE. IF FUEL PRESENT,REPLACE REGULATOR. IS THIS FLEX FUEL CAR? ANY CODES PRESENT NOW? WHAT IS FUEL PRESSURE READING? JUST THINGS THAT COME TO MIND WHILE I LOOK AT THE NEWS. DO YOU HAVE MAP SENSOR? WHILE I HAVE WORKED ON EVERY THING FROM A TO Z IN 38 YEARS, WE NEED A FORD TECH. MAYBE ONE WILL HELP. WISH I COULD LOOK AT THIS ONE IN PERSON. BUT! THAT'S ABOUT ALL I KNOW. GOOD LUCK. IT STILL SHOUNDS LIKE COOLANT TEMP. SENSOR LYING TO COMPUTER WHEN ENG. WARMS UP. AGAIN JUST RANDOM THOUGHTS.

NO FORD TECHS HAVE STEPPED UP YET.IT GOES INTO OPEN LOOP AFTER IT STARTS WARMING UP.REPLACED COOLENT SENSOR NO CHANGE. THINKING MAYBE ECM/PCM.GOING TO ORDER MON.WHAT SHOULD TPS READING BE IN CLOSED LOOP? STILL SHOWING 18% AT ABOUT 960 RPM.AT COLD START.LONG TERM FUEL TRIM ALWAYS 0. THINKING PCM.IF ANYBODY ELSE WANTS TO JUMP IN HERE FEEL FREE. AGAIN THIS ENGINE RUNS GREAT UNTILL IT STARTS TO WARM UP.NO CODES ARE DETECTED UNTILL YOU RUN IT AT ABOUT 2000 RPM FOR ABOUT 5 MIN. THEN IT HAS THE O2 SWITCHING CODE.

POST YOUR QUESTION AGAIN BEFOR REPLACING ECM. AS A RULE FORD COMPUTERS DON'T GIVE MUCH TROUBLE. HOWEVER THEY DO GO BAD FROM TIME TO TIME. 02 SENSOR GROUND(S)? CANT TELL YOU WHERE THESE GROUNDS ARE BUT HAVE HAD THAT PROBLEM WITH OTHER FORDS. CHECK FOR TSB'S ON THIS CAR (TECH. SERVICE BULLETINS) IF SOMEONE HERE KNOWS OF ANY. AGAIN I DON'T HAVE ANYTHING HERE BUT JUST WHAT I CAN THINK OF FROM WORKING ON THEM FOR A GOOD LONG WHILE! GOOD LUCK!!