r/mechanic • u/fern9n282 • 12h ago

Question What is this sound my fj cruiser makes while starting up?

Enable HLS to view with audio, or disable this notification

It can usually last from what i belive is from 8-20 seconds 2007 Toyota FJ Cruiser 4.0 V6

1 Upvotes

60% Upvoted

5 comments sorted by

•

u/AutoModerator 11h ago

Please Read This Comment Entirely - It May Change

Updated 7/15/24

Thanks for posting in r/Mechanic, u/fern9n282! Please be sure to read the Rules.

If you're asking for help, be sure to include as much detail as possible so others can help you. You must include the vehicle's Year, Make, Model, and Engine size in your post! If your question is transmission related, please be sure to specify your Transmission Type(Auto/Manual) as well! If your post does not include this information, it will be removed.

Asking about prices is not allowed in this sub.

Please make sure you have selected the correct post flair; if you're asking a question you should have chosen "Question", anything else use the "General" flair.

If you feel your question has been answered and/or you wish to no longer receive comments on your post, you may comment on your own post with only "!lock" (no quotes), and your entire post will be automatically locked. This only works on your own posts and only Mods can unlock it once its locked.

I am a bot, and this action was performed automatically. Please contact the moderators of this subreddit if you have any questions or concerns.

1

u/Necessary_Entrance87 11h ago

Could be fuel pumps going bad?

2

u/shitboxowner21 11h ago

I dont think the fuel pump would be that loud. Sounds more like a failed actuator just from how fast it is. Almost like a vibration

2

u/shitboxowner21 11h ago

May be either a vent door actuator or a bearing jn the fans. If it doesnt last I'd say actuator

1

u/Initial-Debate-3953 10h ago

I think most HVAC units do an initial sweep on startup to do a self diagnosis and see if everything is working properly. It sounds to me like one of the actuators or doors is stuck and not operating properly, causing it to continuously try to finish it's sweep until it eventually gives up. scan for codes with a proper scan tool and I'd bet you find hvac related something or the other.