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Decanes, If you discuss this with your tuner and have positive results please post!

2019 GT Manual PP1 I have posted many times on this topic and while I have come to terms with the noise, I still maintain my interest in this topic. I finally went and did an oil analysis. Have owned the car since new, approaching 40k miles. Oil changes done every 5k using motocraft 5w30...

Thank you!!!

What tuner / tuning suite are you using?

many of the no tune required CAI’s have inserts that neck it down to factory diameter so the sensor reads right. If the diameter around the sensor is larger than stock it would need a tune or the insert put in.

checked my OBD2 dongle (bluedriver) thinking maybe it would be a data pid, no luck.

can always drop the stock air box in and see if the issue goes away.

a thought, being mass airflow cars, was the K&N CAI a “no tune required”? If not, the larger CAI will slow down the air velocity, the sensor will read low and the car will bog without a tune update. if it’s a no tune required, make sure the mass airflow sensor is installed and connected...

Yours sounds much better than most related to the 2k rattle.

By no means did I mean to offend you. Please take a minute to review my previous posts. I have given data driven responses, some of which had flawed logic that I agreed was incorrect. Subsequent tests were done, results posted and other theories questioned and discussed. I did post evidence...

Other than the previous 20 pages of posts? No. Observation at best...

Check out post #242 with examples from all generations.

Agree, much more prevalent on 18+.

Checkout post #242, examples of all 3 generations making the same sound.

Unfortunately given the relatively new platform and the plasma arc cylinder liners, it could be difficult to define what piston slap should sound like based on history of engines past. All we can do at this point is consider the collective information of the last 19 pages and make our own...

Hate to admit it but I didn’t take the k brace off so I only looked at 1,2 and 5/6. Maybe someday I will look but I see it as a moot point for the next 50k or so miles. If it gets worse maybe sooner but seems consistent so far.

correct, tried long ago with no link to 2k noise. Vac line on and off, actuator on and off.

When listening to it, I could hear the usual direct injection noise, fast ringing metallic noise. The sound level varied between each area but was the same sound. Recreating the rattle resulted in no noticeable change in the DI system. The system increased frequency with RPMs but did not...

I did hook up the stethoscope to the HPFP inlet and outlet of the pump, as well as a high pressure rail and injector. No difference in sound relative to the 2k rattle.