knock sensor

[generation2000]

i know what the knock sensor does. but I have a question. if I dont change it I heard it can be real bad and terminal to your engine is that true? i have had a bad knock sensor for years and havent changed it. am I in trouble? also I get triible gas mileage. 16 mpg could this be the problem? thx.

[Beancooker]

The bad gas mileage is due to your timing being retarded. When the knock sensor died, I believe that the ECU retards the timing. You're best off to have this fixed. You will notice an increase in mileage and HP.

[jltibbs]

not sure what yr/model your car is, but, noah is right on it. if you have a 4th gen, the knock sensor could take you only 30-45 min. it's located just below the upper intake manifold. has one bolt holding it in. just need some good tools to get ot it. if you have a nice mechanic friend, they should only charge about $30-$45 knock sensor is usually around $130-$150.

[coolhand]

If you car is a 4th gen (95-99) this thread may help

zerothread?id=148066

[tiel240]

I have a 2000,is the knock sensor in the same place?

[coolhand]

It is but the intake is different on the 2000 maximas so the procedure may not work. 95 to 99 has enough clearance to reach the sensor.