follow ft86club on our blog, twitter or facebook.
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum - FT86CLUB > 1st Gens: Scion FR-S / Toyota 86 / Subaru BRZ > Scion FR-S / Toyota 86 GT86 General Forum

Scion FR-S / Toyota 86 GT86 General Forum The place to start for the Scion FR-S / Toyota 86 | GT86

User Tag List

Thread Tools Search this Thread
Old 08-23-2021, 03:38 PM   #1
Junior Member
Join Date: Aug 2021
Drives: 2013 FRS
Location: New Orleans
Posts: 3
Thanks: 0
Thanked 2 Times in 2 Posts
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Engine Knock or Vacuum Pump?

This is a 2013 FRS Automatic, 103k miles. My engine is currently making a tapping/knocking sound, the sound is not there when the car is cold; however, when warmed up the sound is heard. My biggest fear was engine knock but after browsing other forum posts I've seen that the automatic transmissions have an issue with vacuum pumps that sounds similar. I have attached videos of the sound below, it is primarily heard on the passenger side of the vehicle. What does this sound like? Engine Knock, Vacuum Pump, or other?

Dazzo is offline   Reply With Quote
The Following User Says Thank You to Dazzo For This Useful Post:
humfrz (08-23-2021)
Old 08-23-2021, 04:19 PM   #2
Senior Member
Join Date: May 2013
Drives: 2013 FR-S, white, MT
Location: Puyallup, WA
Posts: 28,091
Thanks: 25,653
Thanked 28,423 Times in 15,111 Posts
Mentioned: 665 Post(s)
Tagged: 2 Thread(s)
I can't tell anything from the videos.

I suggest get in closer to the vacuum pump and post a listen.
humfrz is offline   Reply With Quote
Old 08-26-2021, 03:22 AM   #3
Senior Member
Join Date: Sep 2018
Drives: Halo 86, '19
Location: NY
Posts: 106
Thanks: 79
Thanked 73 Times in 40 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Sounds like some weird metallic clutter that happens either when you throttle too hard at low RPM or around the 4200 RPM mark. The deeper grunts sound like low RPM lugging to me.
OwlDance is offline   Reply With Quote

automatic, knock, noise, tap, vacuum pump

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Brief engine knock/cold engine/first couple accelerations@2.8-3krpm Reyanth Issues | Warranty | Recalls / TSB 5 11-15-2020 02:32 PM
DIY - Finding a vacuum leak (Cigar/Pump method) BigTuna DIY (Do-It-Yourself) Guides 0 08-12-2019 10:13 AM
Vacuum Pump? febrz Issues | Warranty | Recalls / TSB 0 04-13-2018 04:08 PM
Engine knock Zentec Engine, Exhaust, Transmission 22 09-05-2017 03:46 PM
Vacuum pump oil USMCgetsome Engine, Exhaust, Transmission 4 12-10-2016 08:16 AM

All times are GMT -4. The time now is 05:55 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.