inspect the distributor gear.
Is anyone on line to help me with this question? Where is the fast idle thermal valve in a 1997 Chevy astro van located?
check vac hose's for damg. or hole
change ur air flow meter its on ur air box pipe
vacuum leak, bad idle control sensor
Idle Air Control Motor malfunctioning.
e.g.r. valve replacement fixed mine. symptoms where rough idle and "surged".
i would change the spark plug wires
high idle problem on a 1997 sc1 when car is in gear
The idle is automatic. If the speed is not corect then you have to fix the problem with the idle motor.
Your distributer or your coil
Does it miss on acceleration or at idle? If on accel I would be looking at the plugs and wires
Idle is computer controlled, there is no adjustment screw.
An obdII code reader will tell you why the light is on and might tell you what is wrong
u cant its computer controlled needs a idle air control
Hi there, there is no idle adjustment on this vehicle. The most probable cause is a leaking throttle body gasket, or a bad Idle air control. A stuck open thermostat will cause a high idle in cold climates. Good luck and let me know you find wrong.