Phantom knock issue

19TsiAwd90 · 10-24-2011

sounds like it could be from clutch or flywheel vibration? idk just throwing out some ideas phantom knock isnt fun to track down this much i know..

blackrosenova400 · 10-24-2011

Actually this is an Automatic, I held the car still with the brake and started to stall the converter with 20% throttle to see 43 counts of knock immediatly.

blackrosenova400 · 10-31-2011

Update on this:

Swapped over my exhaust fom my other Talon, which has no leaks, problem stil occurs. Verified cam timing, spark timing. Replaced spark plugs (BPR7ES) and wires, still no change.

Checked for any dead lifters, found none. Bleed one out on purpose and ran engine (when cold as it does not occur when cold), to find the sensor did not pick up any knock from the klacking lifter. Lifter quieted down after 15 seconds.

Hooked up a wideband and ran engine at 20-22% throttle with transmission in gear, car stationary, from 56 degrees until 150 degrees. Picked up no knock whatsoever until 150 degrees. Afr's were 14.1-14.7 entire time. At 150 it started to pick up 13 counts. It seems to happen like clockwork every time it gets warm, it starts to pick it up.

I am going to perform this test again once it cools.