Thread: Having some issues with our recently purchased car. Please help.

1) A colder than stock thermostat and/ or cold weather could cause that
2) 606 are a factory temp plug, you may need to go a stage or two colder depending on your mods
3) Have a tech at the shop you work at pull the code when you have some free time. A ford dealer should have an obd2 code scanner.

lol...they cant read SES lights? Lazy bastid. As for the temp gauge, I'd agree with the colder thermostat, mine is almost always at the 1/4 mark. But did you say it drops down? If thats the case, I'd think it'd be the temp sensor. The code from the obd2 scanner should point you in the direction you need to go.