The_Gza

As subject - has anyone had the knock sensor on their engine fail or start to fail? If you did, what were the symptoms that you noticed, or what would you expect to find if it did begin to fail.

Think this might be a possibility on my car - in beginning to fail (no ECU fault code) it becomes more sensitive and retards the ignition giving a "flat" feel when on boost. Also a possibility that it might become more sensitive to the noise from the exhaust and be picking up false readings etc. I'm far from an expert on this - just trying to make sense of the info from my resident technical expert who has suggested this as a possible cause of my probs

Any thoughts?

Maddog

Try an ECU reset to see if it cures *flatness*
If it does and fault comes back after a while then maybe sensor is faulty or you've ran on dodgy fuel and its knocked the timing back.

The_Gza

Tried the reset - after which it was fine for a couple of days, then went back to it's old self

Running on SUL pre-reset and SUL + Octane Booster after the reset.

I'm going to try resetting it again and then see what happens...

R19KET

The knock sensor can be unreliable. I had a similar problem with mine, where the Link ecu kept retarding the ignition at circa 6k. It took a while to identify a faulty sensor, and this was done with a set of det cans, confirming the engine was "clean", even though the Link ecu was showing telephone no. det's.

Mark.

[Edited by R19KET - 2/15/2002 12:11:04 PM]

The_Gza

Thanks Mark,

The plan is to fit my Link with a safe map and see what det count it gives - therefore if we know the map is safe and shouldn't be detting, and the ECU is giving a high det reading, this leads us towards the Knock sensor giving out faulty readings.