TPS and stop screw set up

[jondee86]

The A/C idle-up uses a separate solenoid valve to let air into the
downstream side of the AAV. The P/S idle-up is a mechanical valve
that allows air from the upstream side of the AAV to pass into the
downstream side. Neither of them are affected by the operation of
the AAV itself.





The AAV is contolled by a wax filled capsule that is heated by the
circulating coolant so that it gradually expands and cuts off the
extra air by-passing the throttle butterfly. It is very common for the
AAV (or the two little water hoses) to get blocked. If the idle goes
high and stays high as the engine warms up, at a certain temperature
it will start to cycle on fuel cut. The effect is a rise in fall in revs that
sound like you are gently pressing and releasing the gas pedal.

Here is some information on how to clean the valve if it is blocked...
http://club4ag.com/forums/viewtopic.php?t=12013
When the engine is warmed up, both of the little water hoses should
get hot. If one gets a bit warm but the other one stays cool, the valve
or hoses are blocked and the valve will not close to bring your idle down
as the engine warms up.

Cheers... jondee86