tss201secreto

im having problems with my car. when engine is cold it takes a few seconds 2 turn on like it hesitates . but only when its cold .after that it turns on and off normal. its a dx wit single vtec swap... i was wondering if it could be the knock sensor... or the coolant temp sensor... my engine check light is on ...please help ... i ran my codes be 4 and it read
06:coolant sensor i was told it the same thing as water temp
21:vtec siloniod
03: map
and my 02sensor i replaced the map . pluged my vtec and wired my 02 . i havent changed the 06 yet ... after the car is warm there is no other problems idle is at 900rpm steady doesnt jump or any thing car doesnt smoke eather ....
please help .....