legacycentral bbs

So my knock sensor is going out and of course the check engine light is goin on and off when it wants to, i was wondering if it should be fine to drive another few hundred miles till i can fix it....it shouldnt be messing anything else up or have any other problems should it? its coming on more frequently now too....

You'll be running rich with a faulty knock sensor signal, but shouldn't be a big problem.

And you will be running with absolutely crap timing so the car will feel slow. It would probably run fine on 80 octane fuel like this lol

I drove from Oregon to Texas with a bad knock sensor... car would rattle on hard pull, onramps, etc... BUT got an average of 32 MPG for the trip.... I also had one injestor that started dying at idle going thru Salt Lake City, ran fine off Idle, so I kept going.

It definately WASN'T pulling timing...

I can say with 100% certainty (via lots of data logging), that when there is lots of knocking, the ECU WILL reduce the "octane factor" parameter and the "knock retardation" parameter will increase. Once octane factor falls below 25%, extra fuel is added (WOT is about 1 AFR more rich) . Timing map is also reduced when its not at 100% either.

IF the knock sensor registers the knock, which it appears mine didn't

On a N/A car I think it doesn't affect it much. I remember on my N/A when I replaced the cracked knock sensor made no difference.

I can tell you when I was "testing" my knock sensor and trying to make it not as "sensitive" when I was non-turbo, it tweaked out and made the car run like poo. I had no power, and it threw a CEL.

Poo don't run.....

douglas vincent wrote:Poo don't run.....

I'm sure if you ate some mcdonalds it will