Also make sure the proper side of the electrical connector is at the top (I don't think this really
matters, but why take chances).
4. If you removed the TPS reinstall it and make sure that the shaft from the throttle blade fits
into the TPS exactly as it was when you removed it.
5. Inspect the large O-ring that fits between the throttle body and the intake manifold for
damage. Replace if necessary (it should not be necessary).
6. Place the throttle body over the opening in the intake manifold (don't forget to take the rag off
of the intake!). There are pins on the intake manifold that are used to align the throttle body.
7. Reinstall the three 8mm bolts that hold the throttle body to the intake manifold. Tighten to
105 inch pounds (8.75 ft lb) of torque.
8. Reconnect the electrical connectors to the IAC motor and the TPS. One is blue and one is
white, just match the colors. Make sure they snap closed.
9. Reconnect the throttle linkage and cruise control linkage.
10. Reconnect the vacuum hose.
11. Reinstall the air hat over the throttle body. Make sure the gasket between the throttle body
and air hat fits properly over the air hat. Do not tighten the hose clamp yet.
12. Reinstall the two 10mm bolts that mount the air hat to the intake manifold. You may have to
adjust the position of the air hat slightly to get them to line up (which was why the clamp was
left loose in step 9).
13. Tighten the hose clamp between the air hat and throttle body.
14. Reconnect the hose between the air hat and air filter box, and tighten the hose clamp.
15. Reconnect the negative battery cable.
CHECKOUT
1. Start the engine and let it idle without pressing the accelerator for about a minute. This will
let the PCM "Learn" the new idle airflow.
2. If the engine idles high shut it off, wait a few minutes and restart it. The PCM only checks
some engine parameters when the engine is "Cold Started". Sometimes after cleaning the
throttle body the engine will idle high, sometimes it doesn't (mine did not, another person told
me that his did). This should go away when the PCM learns the appropriate position of the
TPS and IAC for proper idle speed, however that could take several cycles of "Cold Starting"
the engine.
a) If you removed the TPS check and make sure that it was reinstalled properly. The shaft
from the throttle blade can rest on either side of the lugs in the TPS. If it is on the wrong
side it can change the idle speed.
3. If high idle continues after a few cycles of turning the engine off and restarting you can
manually reset the PCM. Doing this may cause you to have to reset certain things such as
your clock, radio stations, etc.
a) Disconnect the negative battery cable.
b) Turn the ignition key to "Start" and hold it for about 15 seconds (the engine obviously
won't start or even turn over without the battery cable connected).
c) Reconnect the battery cable.
d) Start the engine and let it idle for about a minute without pressing the accelerator. This
time the idle speed should be back to normal (around 500 RPM).
