you don't need a torque wrench for 7 ft lbs. just tighten it until it wont tighten anymore by hand and then about another quarter to a half of a turn.kind of the same as spark plugs. if it feels right leave it alone
I was actually replacing a coolant temp sensor yesterday when I decided to pull a coil pack out to discover oil than I replaced the spark plugs coz they were all old as fuck THAN realized my fucking injectors are leaking which is probably why I have poor mileage