Hello again,
got a 2.3 88 auto,the issue is once hot and in park it idels at 1300 : When it starts cold first try idles at 700rpm, in drive at 1000,but once it warms up and placed park its at 1300.
Can someone help figure this out?

Do a search on Throttle Valve Switch, posts by Duke2.8 . That is a likely place to start.

Jorg

Unplug the connector to the idle control valve. If the idle drops, look for a problem in the control loop - a sensor, throttle switches, the ECM, or power to the ECM (OVP). If the idle does NOT drop, the ICV could be sticking, or you have an air leak. Look for broken or disconnected vacuum hoses or idle air circuit hoses. Check also that the throttle linkage return is unobstructed, so that the throttle properly closes down when the pedal is released.

Steve

__________________
'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7

I dont know where the "control loop - a sensor, throttle switches, the ECM, or power to the ECM (OVP) " are? I do know where the ovp is; help with the other.

Sensors in that loop include various temperature sensors in the head and air intake, the potentiometer on the airflow meter, the O2 sensor in the exhaust, etc. You'll need the service manual or CD or to peruse the posts here to find them all. The ECM is what I am calling the fuel injection computer, near the OVP. But, it's all moot if you pull the plug on the ICV and nothing changes. Do that first.

Steve

__________________
'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7

do you have an code# for the ecm?