[Bulk] Knock sensors for 20v

[Mark Rosenkrantz]

If a knock sensor is internally broken (sensor separated from the plastic
case), normal engine vibrations (non-ping) can "set them off."  Hopefully
that makes sense.  There are failure modes other than it not working at all.

Mark Rosenkrantz

On Tue, Jun 30, 2009 at 10:55 AM, urq <urq at pacbell.net> wrote:

> ... a knock sensor can only capture information that the engine is
> misfiring
> and send this info to the ECU.  The ECU can only do so many things to try
> to
> make it stop.  If your engine is hot, has carbon deposits and/or has poor
> quality fuel it may ping under high load, and you are doing about the only
> thing left ... backing off on the go pedal.  I suspect your knock sensor is
> working properly.
>
> Some cars light the check engine light when there is pinging the ECU can't
> stop on its own, and most will store a code in the ECU ... check the codes
> to see if the ECU is telling you anything ...
>
> Steve Buchholz
>
> -----Original Message-----
>
> I suspect a faulty knock sensor as I hear a rhythmic pinging noise when the
> revs approach 3000 rpm, easing off the gas stops the pinging
> Is there a simple test to pick which one is faulty.
> Thanks for any advice.
>
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