1st:Is your car a Federal or Calf. model? 2nd: Is it being tested to the standards posted for the year model, and see above "model" of your car. If not, it should be. It is highly unlikely that is will pass the "newer" smog limits. 3rd: Which one of the 3 senors did you replace? Single wire goes to the gauge Smaller 2 wire is the temp sensor for the ecu Larger 2 wire is the thermal time switch. This is the one used for warm up 4th: Make sure ALL grounds are clean and tight. Which plug are you disconecting? If it is the larger one the thermal time switch is bad. If it is the smaller one then it is either a bad sensor or a loose conection.