Thread: Knock Retard Issue

Originally Posted by bluegtp91

So, it's just an open cone then...right off of the MAF sensor.

Try putting a little piece of pipe inbetween the MAF and the filter and see if that cures it.

Will do, I'll post the result upon further testing

It's going to be warmer at idle because there is no airflow at 0 mph in a hotass engine bay. At cruise or above it should be within 10-20* of ambient.

What have you changed since the tune?

Originally Posted by FoSHO99

It's going to be warmer at idle because there is no airflow at 0 mph in a hotass engine bay. At cruise or above it should be within 10-20* of ambient.

What have you changed since the tune?

Only the air filter...

Previous setup : Inside-Out Cone Filter - Aluminum Pipe - MAF Sensor - TB
Current setup : Dryflow 9" Cone Filter - MAF Sensor - TB

See, probably skewed the MAF readings.

Go back to what you had.

If you are running a "newer" style aeroforce gauge, then make sure you are scanning under "knock 1", and not the knock 2 or knock 3 parameter. I drove with the gauge for a year thinking I had crazy spikes of KR at WOT (sometimes up to 7-8*), because I had it set to knock 2 and not knock 1. Knock 1 is for GM cars while knock 2 and 3 are for other vehicles. With it set to the correct scanning parameter for KR, I now just get "blips" of knock under hard throttle usually under 1* depending on the weather. Just an FYI...

Originally Posted by crbquist

If you are running a "newer" style aeroforce gauge, then make sure you are scanning under "knock 1", and not the knock 2 or knock 3 parameter. I drove with the gauge for a year thinking I had crazy spikes of KR at WOT (sometimes up to 7-8*), because I had it set to knock 2 and not knock 1. Knock 1 is for GM cars while knock 2 and 3 are for other vehicles. With it set to the correct scanning parameter for KR, I now just get "blips" of knock under hard throttle usually under 1* depending on the weather. Just an FYI...

Yeah it's under knock 1, for some reason I took the time to read the booklet So after 94 and putting in back to the old setup I have blips of 3-4, 5 under big stress but drops to 0 afterwards...I think spikes are false knock. Neways, like I said, I haven't seen performance issues yet...I can stop worrying about it I think