the idle tensioner and or the distributor.
Right at the top of the engine you will find the carb immediatley to the right on the carb you will see a flat head screw this will adjust your idle , helps to have a second person on this.
On VWs, the Idle Air Bypass Valve is generally referred to as the Idle Stabilizer Valve (ISV). The ISV is designed to maintain a steady idle speed. It is mounted on top of the cam cover on mk2/A2 8v Golfs.
Try cleaning the EGR valve.
How high is your idle? idle should be 800rpm good oil pressure is obtained at this idle
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i would check for vacuum leaks first but there is an idle august screw on the air intake wear the throttle cable connects to the intake
The idle speed is set at the factory and is NOT adjustable.
There are a number of reasons why a 1991 Toyota Corolla engine would stop running after startup. It could the idle control, an EGR leak, or low fuel pressure.Ê
check for a loose or broken vacume line on the engine probably on the intake
Driver error.
Was there any recent work done to the car? When did the idle problem start? Does the idle get worst when you turn on the AC? Answer these questions and then I may help.