The old EXT seems to be running rich (like its in the safe mode) but does not display any codes? Yes it does have power to the ECU and it will give one short flash when I turn the key on. Also tried it while it was running. Has anybody else had this problem? And do you just have to suck it up and start testing every sensor individualy? Could it maybe be something else that would not show up on the ECU? Thanks, Croc

if its running rich i would start with the tps and the temp sensor. also, make sure your not seeing one long and one short. some dealers ive talked to say the light is not always right. good luck!