Which lights?
I have the same problem with my 98 Isuzu Rodeo. If you haven't already, replace the Idle air control valve. I have the same problem with my 98 Isuzu Rodeo. If you haven't already, replace the Idle air control valve.
idle air control motor has to much build up of carbon, clean it
u dont set the idle the ecm does the setting througt the air idle conrtol. If it wont idle u need to replace the aic motor on the th0rottle body!
Valve Clearance (Cold) Cold intake-0.15mm(0.006)" Exhaust-0.25mm(0.10)" Idle Speed- (900)rpm
Idle speed is computer controlled and is not adjustable. If the speed is incorrect check for a stuck idle speed air motor, on the throttle body, and for air flow problems.
Since it is a throttle body, check to make sure that the cable is not binding, if it is, replace it. If the cable is free moving, it is either the Idle Air Control valve, or the Throttle Position Sensor. Those are the most common culprits.
the cold idle is controlled by the PCM ( power train control module) the computer of the car and idle is not adjustable.
There are a couple of reasons why a 1986 Isuzu will not idle. One reason could be the oxygen sensor and another reason could be in the fuel system.
Idle air control actuator is probably bad.
Will vary between 700 and 1000 rpm.
First you must check the ISC motor ( idle speed control) operation. Its located by the throttle body. It controls idle and high idle speeds. Good luck