Sandro

A while ago I noticed an odd sound coming somewhere under the hood. When you start the car and not long after that (30-40 secs or so) shift to drive and take off, it appears from 2000 rpm onwards only when you accelerate. Should you release the pedal, the sound goes away. This sound completely goes away after a few minutes, (something warms up?).
Also there is no such sound when revving in P or N in same conditions, only when moving and accelerating.

The sound looks like faint rattle or screech or something.

Anyone experienced that with the ZDX? What could it be?

Sandro

I guess i found the answer
http://www.mdxers.org/forums/attachm...g-ping-doc.pdf

terdonal

Interesting. Good thing you found that and that they know what causes it.

Sandro

Yep. Seems that bad fuel is the reason. In Russia even premium fuel is of crap quality.
Got a full tank of ultimate gas today, lets see how it goes.

3BYSN1QT

Hi Sandro, just want to get updated with this issue of your Zed because I started hearing the same noise in the last 5 days. Did you bring your Z to your dealer? Did they do the procedure on the link you've found? Is it safe to drive while having this ping noise as the appointment I got will still be in the next 3 days? Is the noise completely gone?

justnspace

iTrader: (1)

oye!
you better have awesome fuel for your turbo ZDX!

Sandro

yes its safe to drive, just try different or better fuel next time and update the PGM-FI ecu

3BYSN1QT

I tried to put 94 octane gas this morning and it seems the noise is getting low and if ever the noise will totally diminished, is it still advisable to bring the Zed to the dealer for the update?

Sandro

yeah since there was a service bulletin for that issue and new software to fix it