11-22-2009, 09:29 AM
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Blinded by the light
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Join Date: Sep 2009
| | How To: Cleaning Throttle Body
Written By: FireRanger
Pictures by: STL
Discussion Thread: How To: Cleaning Throttle Body
(1)Remove factory throttle body cover.
Loosen hose clamp where the intake hose meets the throttle body. Unplug the MAF electrical connector and the crank case vent from the intake hose.
(2) Pull the intake hose off the throttle body and unlatch it from the air cleaner box. Put it off to the side out of the way. Look in the throttle body, you will see it caked full of black dirt and oily residue. Its nasty, don't wear nice clothing.
(3) Unplug the wire from the throttle position sensor on the side of the throttle body. Loosen and remove the two philips head screws holding it on. Place it aside.
(4) The throttle cable is pretty obvious on how to unhook it from the throttle body. Lift and slide off to the side like a bicycle brake caliper. If you have cruise control, you just pull back on the connection and it will snap off (yes, it snaps back on too). Disconnect both of them.
(5) The throttle body is held onto the intake manifold with (4) 5/16" bolts. Loosen, remove and don't lose the bolts. The throttle body will come off in your hands. Don't drop it.
(6) Now that you have it off the truck it is time to clean it. The most logical cleaning solution is throttle body cleaner (duh). I didn't have any so I just used an ether based spray can of starter fluid. Do not smoke, toke, grind metal, or launch fireworks while using any of these cleaners.
(7) Spray it in and let it soak, dump it out. Do the same on the other side. Spray some more and work the throttle plate open and closed. Spray some more and use some paper towels or shop rags to wipe it out. You'll probably need to do a lot of spraying and wiping.
(8) The tricky part is cleaning the throttle plate. You have to hold it open. With the throttle plate held open, clean the plate, the edges of the plate, and the throttle body around where the plate closes. It can be really caked full of crap around there since it is choke point for the air flow. It is pain in the ass to do while holding it open. Wedge it on something or have someone hold it for you.
(9) Spray some more around the exterior linkage and clean that up nice.
(10) Make sure the whole thing is clean, dry and free of loose crap, bits of towel, torn skin, or dried blood.
Work backwards from step (5) to reassemble. Make sure you plug all the stuff back in and reattach that crankcase vent. Start the engine. If it will not start, runs like crap, or throws a rod through the hood, then you obviously can't follow simple directions and ya done f*$ked up. I take no responsibility, award you no points, and may god have mercy on your soul.
Last edited by STL; 08-08-2010 at 08:54 AM.