Subject: RE:knock sensor by CFI-EFI on 2008/1/15 15:35:16
Quote:
(channeling CFI-EFI)
Make sure you're not just killing the messenger by replacing the sensor ...
That doesn't quite apply, here. There is no code and therefore no messenger. But the caveat still applies. The knock sensor is working. You have detected knock counts that proves it is working. It is a waste of money to replace it. If anything, the old knock sensor may have lost some of its sensitivity over the years. A new knock sensor can only make matters worse, besides wasting of money.
If you are sure it isn't retarding the timing, then apparently there are insufficient knock counts to trigger the ECM into retarding the timing. In that case, there IS no problem. You are trying to fix a nonexistent problem. If you want to test your ESC, try advancing the timing to increase the knock counts, and check to see if the timing gets retarded. If it doesn't, there is a problem somewhere else. Unless you can't increase the knock counts by inducing real knock, you have evidence that the knock sensor is working.
