06-07-2020, 11:16 PM
The engine needs to be hot.
The RPM goes to 800 at 150f and higher,
the IAC closes 100% at 150F then the ISC now controls idle at 800rpm
not in idle UP mode, ECU pin called idled up must be false. (AC off, blower off. PS overload switch not active,head lamps off)
if all that functions ok above, then the ISC holds 800rpm
if you fail to calibrate the ISC with the 89 idle stop screw that too ends in wrong RPM
and last any and all vacuum leaks, cause high idle is said leak exceeds range of ISC .
use google translate please.
there is more
if the thermostat is missing RPM will never be correct ever,
if using wrong low temp thermostat the same think 180 to 200F stamped thermostats only are to be used .
good luck to you.
The RPM goes to 800 at 150f and higher,
the IAC closes 100% at 150F then the ISC now controls idle at 800rpm
not in idle UP mode, ECU pin called idled up must be false. (AC off, blower off. PS overload switch not active,head lamps off)
if all that functions ok above, then the ISC holds 800rpm
if you fail to calibrate the ISC with the 89 idle stop screw that too ends in wrong RPM
and last any and all vacuum leaks, cause high idle is said leak exceeds range of ISC .
use google translate please.
there is more
if the thermostat is missing RPM will never be correct ever,
if using wrong low temp thermostat the same think 180 to 200F stamped thermostats only are to be used .
good luck to you.
http://www.fixkick.com