Throttle Body Cleaning
I ran the leakdown test and heard some hissing from the throttle body (I ended up changing the O-rings later Click here). I decided to pull and reseat it to the intake manifold. This, as usual, is to be used with other instructions. There are Vfaqs on this topic so I didn't go in to too much detail.
 |
I labeled the vacuum lines with tape and a marker
before starting. The UIC pipe is removed. I pulled all the lines off.
|
 |
Remove plug from TPS. This is done with a precision
screwdriver you pry the retaining clip out just enough to clear the
tab holding it down (right arrow). Try to leave clip on the plug (avoid
it falling into never never land) and plug should pull off. Do Not
remove the Throttle position sensor. There is no need to. It is
spring loaded, adjusted by the screws holding it in and has to be measured
with an Amp meter (Ohm resistance, See a Auto manual for info).
|
 |
Quick Side Note: This is the best 10 bucks I've invested in a while. The magnetic screwdriver with light. Once, I dropped a valve cover bolt into the timing gears. The light helped me see it and avoid pulling all belt and cover to fish it out. Snagged that sucker out with this tool. Always close by when I work on the car. |
 |
There are 2 coolant lines attached to the bottom of the throttle body. Carefully remove them and plug them to prevent coolant from getting all over everything. Here I used a manifold stud for one and the cap (cone-shaped and long) from the RTV sealant for the other. The arrow shows another plug to remove (ISC Motor). Remove 4 bolts/nuts holding throttle body on and the accelerator cable. Also, the black steel bracket (one nut by cam sensor) and the Phillips screw on top (none of this pictured sorry). |
 |
Add some tape to cover slot shown by arrow. My throttle
body is not very dirty because I cleaned it out 10,000 miles ago. Now
to see a nasty throttle body Click
Here.
|
 |
Spray with carburetor cleaner and let it sit for a
few. I took a rag to wiped it clean.
|
 |
Remove the two screws holding the ISC motor and shoot
a little carb cleaner in there as well. I wiped the end of the motor
off (plastic tip) with a rag soaked in carb cleaner. Blow it out with
the air gun when through or let it dry. Put motor back on.
|
 |
Nice and shiny.
|
 |
I used and air gun to be certain it was dried. Not
totally necessary, you can let it sit and dry.
|
 |
I also soaked a rag with carb cleaner and carefully ran a rod into the intake manifold to remove gunk buildup while I already had the body off. It came out dirty so it got some of it. Also, the picture shows the battery still in the car. I had no problem working around it. |
 |
Now, putting it back together. First, I added a very very light coat of RTV sealant to the gasket between the Tbody and manifold. The enlarged elbow (HKS) makes it very difficult to get the bolt (arrow) in. I put the 2 bolts in and attached bracket and clip to the elbow (as pictured). It went straight in. I snugged the two bolts, Phillips screw and nut for bracket hand tight. I added the other two nuts to the body and tightened them in sequence (like a wheel). Do not over tighten! Put all the plugs, clips and lines back on and you are through. |