The car is designed this way for cold starts. It should idle up to 3000 rpm then makes it's way down to around 1500 and finally down to 750 as it warms up. DO NOT drive when it is cold or If you have to do not take it over 3 grand until warmed up or you risk blowing coolant seals.
if this happens when you first start the car it is normal. It is just the cars way of warming up the engine.
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
check your idle air control valve and/or your TPS
Idle Gossip was created in 1986-08.
Cars often idle fast when you start them up. The automatic choke will make the car idles fast for a while then the idle speed will slow down, once the engine warms up.
The IAC (idle air control) at the throttle body is usually the problem.
well. whenever you have a low idle, you use first gear to accelerate. if u have a higher idle or throttlebody, you can just start in second gear.
Did you try checking the idle adjustment screw?
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.
Check the alt & idle speed.
when u first start the car it will idle high, around 1.5 rpm to 2 rpm. when its warm up it should idle between 700-1000 rpm
Try cleaning the EGR valve.