Thoroughly Clean Throttlebody and IAC (horizontal throttle body)

Author: Jonathan Swain (aka "PurdueGuy")

Relevant Models

1991-1992 SC
1995-2002 SC1
1993-1999 SC2
1995-2002 SL
1995-2002 SL1
1991-1999 SL2
1993-2001 SW1
1993-1999 SW2


  • Locking pliers or flathead screwdriver (depending on your clamp style)
  • Torx bit (size?) for TPS & IAC
  • Ratchet
  • Socket (10mm?)
  • Throttle/carb cleaner
  • Rag
  • Toothbrush (optional)


Step 4

Use some throttlebody or carburetor cleaner (other cleaners may work, also, but these are made specifically for this task…), and a rag. 

Spray and wipe, rinse and repeat.  That’s all there is to it.


Notice the nice, shiny throttleplate.  That’s the side that faces the plastic intake tube… (this is before any cleaning)

Now look at the backside…  it’s hard to even tell where the throttleplate is, but it really is that black circle.

Clean that puppy up!  You don’t have to get it uber-clean, but there’s metal behind that gunk somewhere – find it!

While you’re at it, clean up the IAT valve.  Go ahead & use the same cleaner to get any major gunk off the tip, spring, and gasket.


Installation is the reverse of removal.

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