I just bought my Maxima from a friend that took less than acceptable care of this car. I was just wondering if there are some particular things fix. It's well worn in at 124,000 miles. Should I replace the knock sensor? (I have no idea if it's working or not) Should I have a fuel injector service? Also, I'm having very poor gas milage (~20 with moderate driving). Any suggestions would be really appreciated. Thanks.

 

check the ecu for the knock sensor code

 

What about other servicing? I'm scared for my cars health.

 

poor mileage?????????????????' 20??????? man you should be happy with that mpg.