Knock sensor on 04 Forester

[Wing]

I've heard people from this group saying there's a knock sensor on 04
Forester that went bad sometimes. I asked the same question to my mechanic
and told him that I put in regular unlead gasoline as recommended on the
manual. He said cars with knock senser should use premium gas or else the
function of the sensor would be useless. Cars without knock sensers can use
any type of gas. Is that correct I wondered?
He means there's no point putting in a knock sensor if regular unlead is
used. The knock sensor will become faulty if you keep using regular unlead
instead of premium gas.

 

[Tony Hwang]

I've heard people from this group saying there's a knock sensor on 04
Forester that went bad sometimes. I asked the same question to my mechanic
and told him that I put in regular unlead gasoline as recommended on the
manual. He said cars with knock senser should use premium gas or else the
function of the sensor would be useless. Cars without knock sensers can use
any type of gas. Is that correct I wondered?
He means there's no point putting in a knock sensor if regular unlead is
used. The knock sensor will become faulty if you keep using regular unlead
instead of premium gas.

Hi,
That is pure B.S.
Tony

 

[Edward Hayes]

Your mechanic??? said this?? He is misinformed to the max. The knock sensor
is there to detect damaging detonation while keeping the ignition timing at
optimum for best performance. Find yourself someone who understands modern
engine systems. ed Hayes

 

[ZZ]

The On Fri, 25 Jun 2004 12:13:23 GMT, "Edward Hayes"

Your mechanic??? said this?? He is misinformed to the max. The knock sensor
is there to detect damaging detonation while keeping the ignition timing at
optimum for best performance. Find yourself someone who understands modern
engine systems. ed Hayes

The knock sensor in my old 97 Neon DOHC was used (among other things)
to change the enginge performance. (via engine timing?)
If you ran it on regular the sensor adjusted the engine computer so
that it would run well on the economy fuel.
If you used super it adjusted the engine (via the lack of knock) for
more performance. According to Plymouth (RIP) the horsepower changed
from 135 to 150 based on the knock sensor input to the computer.