Ticking sound at idle (video link)

Reply Subscribe

Thread Tools

Search this Thread

07-15-19, 08:53 AM

#16

KKoll

Driver School Candidate

Join Date: Mar 2019

Location: CA

Posts: 6

Likes: 0

Received 3 Likes on 2 Posts

Quote:

Originally Posted by Dholmq

Thanks for all the replies. Very helpful. Question: should the sounds be intermittent? Today for example I was at a stoplight and the sound was present and very obvious. I drive 2 more blocks, stop at the night and poof just a smooth sounding engine and the ticking as 100% gone. So strange. Help please.

The 4th Gen RX engine has both direct and port injection (a brilliant solution to the direct injection carbonization problems), Engine management switches between the modes based on engine state and power requirements.

Reply Like

The following users liked this post:

gadgetman1 (07-15-19)

07-15-19, 10:13 AM

#17

gadgetman1

Racer

Join Date: Oct 2016

Location: Texas

Posts: 1,404

Likes: 204

Received 214 Likes on 170 Posts

Quote:

Originally Posted by KKoll

Now this is very useful info that i did not know! I too have heard the very light ticking off & on & wondered about it. It’s so faint, I just never worry about it. Thanks for posting this!

Reply Like

07-15-19, 11:18 AM

#18

arrowroot

Pit Crew

Join Date: Mar 2019

Location: WA

Posts: 128

Likes: 0

Received 24 Likes on 17 Posts

Quote:

Originally Posted by computerwi

The ticking sound is the fuel injectors. The 4th gen RX has both port and direct injection and the engine also varies between the Otto and Atkinson cycles. Thus, the timing of the valves and injectors change under different engine load conditions.

Interestingly enough, when I brought my 2016 Rx in to the dealer last week for service and asked them to listen to the ticking sound, they told me it was the mechanics fuel pump causing the ticking sound and that it was completely normal.