What the !#$% is this?
Thread Starter
Junior Member
Joined: Dec 2009
Posts: 37
Likes: 0
From: Whistler BC
Car: 85 trans am
Engine: 305 tpi
Transmission: 5 speed
What the !#$% is this?
Pulled my TB off today and found a caked on black residue. Has anyone ever expeirienced this before? If so what is this.
Senior Member
Joined: Feb 2010
Posts: 1,125
Likes: 1
From: San Diego, California
Car: Trailblazer EXT 4.2 (Firebird Form)
Engine: 5.1 4bbl
Transmission: 700R4 Mega Raptor Level 4
Axle/Gears: 2.73
Re: What the !#$% is this?
poor maintenance IMO... 
... gotta clean that throttle body every oil change or so ... at least every six months..
... gotta clean that throttle body every oil change or so ... at least every six months.. 
Joined: May 2004
Posts: 2,262
Likes: 1
From: houston
Car: 83 POS monte carlo 2015 chevy P/U
Engine: 92 5.7 tpi 5.3
Transmission: 700r4 6L60E
Axle/Gears: 2.42 too high
Re: What the !#$% is this?
some of it is from the EGR valve.
most of it is from the PCV system.
its completely normal.
i've seen them sludged up much worse than yours'.
some good carb cleaner will clean it right up.
most of it is from the PCV system.
its completely normal.
i've seen them sludged up much worse than yours'.
some good carb cleaner will clean it right up.
Junior Member
Joined: Mar 2010
Posts: 19
Likes: 2
Re: What the !#$% is this?
Use some Seafoam and Deepcreep on that. That stuff works wonders. Heres a link to the best how to I've found http://www.lt1engine.com/tech/how-to...arbon-buildup/
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Junior Member
Joined: Apr 2010
Posts: 23
Likes: 0
From: Hoschton, GA
Car: 1987 Firebird
Engine: 305 (LG4)
Transmission: 700R4
Axle/Gears: 2.73
Re: What the !#$% is this?
I just used Seafoam today to remove carbon build-up. It restored some lost power. Smoothed out the idle too. Great for my high mileage engine! (212,000 mi)
Senior Member
Joined: Feb 2010
Posts: 1,125
Likes: 1
From: San Diego, California
Car: Trailblazer EXT 4.2 (Firebird Form)
Engine: 5.1 4bbl
Transmission: 700R4 Mega Raptor Level 4
Axle/Gears: 2.73
Re: What the !#$% is this?
NO DON'T DO THAT.... YOU need to use TB cleaner... Carb cleaner from my understanding has a different chemical structure compared to that of a throttle body cleaner...