Mike "Wuzzy121". Rest in peace, brother

Go Back   Tacoma World Forums > Tacoma Garage > 4 Cylinder

Notices

MYSTERY SOUND

Reply
 
Thread Tools Search this Thread
Old 01-13-2012, 02:36 PM   #1
coalminer [OP] coalminer is offline
Member
coalminer is on a distinguished road
Joined: Aug 2011, #61594
Location: ky
Gender: Male
Posts: 53
coalminer's Tacoma Gallery
MYSTERY SOUND

my 08 2.7 makes a strange sound on start up. it sounds like something being sucked closed and then my ideling drops down to normal. im pretty sure its nothing but im one of those guys who cant stand a noise and not know what it is. does anyone else have this sound.
thanks.
  Reply With Quote
Old 01-13-2012, 02:37 PM   #2
:POOPCORN:
98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed98tacoma27 is one of the sharper tools in the shed
 
98tacoma27's Avatar
Marines:
Name: Ben
Joined: Dec 2008, #11714
Location: Beech Creek
Gender: Dude
Posts: 48,263
98tacoma27's Tacoma Gallery
I think that's the ABS self test
  Reply With Quote
Old 01-13-2012, 02:59 PM   #3
coalminer [OP] coalminer is offline
Member
coalminer is on a distinguished road
Joined: Aug 2011, #61594
Location: ky
Gender: Male
Posts: 53
coalminer's Tacoma Gallery
ok thanks man, thats one of the many great things about this forum there are not many unsolved problems.
  Reply With Quote
Old 01-14-2012, 06:24 AM   #4
Senior Member
ecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shedecoterragaia is one of the sharper tools in the shed
 
ecoterragaia's Avatar
Joined: Jan 2011, #49786
Location: Bumpass, VA
Gender: Male
Posts: 367
ecoterragaia's Tacoma Gallery
It's an emissions related air injection pump. Look for a small electric motor located in the engine bay on the passengers in front of the engine. It pumps fresh air into the exhaust manifold during cold startups, which causes a sort of 'afterburn' effect and heats the catalytic converter up faster.

When I first got my truck I had a hard time finding info on this topic. It's not discussed on this forum very much, which means people either aren't aware of it (despite the 'shop vac' sound at startup), or people don't have many problems with the pump failing.

Anyway, don't worry, it's totally normal.
  Reply With Quote
Old 01-20-2012, 07:37 AM   #5
Senior Member
DGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shedDGXR is one of the sharper tools in the shed
Name: Friend
Joined: Sep 2009, #22094
Location: Sacramento, CA
Gender: Male
Posts: 871
DGXR's Tacoma Gallery
Ya it's like a pissing/whistling sound about 15-20 seconds after startup, after which the RPMs immediately begin to drop. It's normal, mine's been doing that on every cold start since I got it.
  Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Mystery Switch Rucas Technical Chat 33 11-23-2011 07:47 PM
Minor Mystery... Tilt 2nd Gen. Tacomas 9 11-08-2009 01:19 PM
mystery plug wbhvacer 2nd Gen. Tacomas 7 05-11-2009 04:08 PM
Mystery Part # 2 DriverSound 2nd Gen. Tacomas 6 05-05-2009 10:49 AM
Mystery noise CJH9980 2nd Gen. Tacomas 5 01-10-2009 01:18 PM


Copyright © 2014 Tacoma Forum. Tacoma World is not owned by, or affiliated with Toyota Motor Corporation.