in the late model 2nd gen cars the fast idle at start up is the choke function. esp when the motor is cold. once it starts a quick push on the gas pedal releases the automatic choke
When I start up my 1988 cherokee laredo the idle is so high and loud it make me get very angry?
Check the alternator.
It's usually a vacuum leak.
The first song in high school musical is start of something new
possibly a vacuum leak or ur throttles out of adjustment
Flooring the gas petal.
The most likely cause would be that the Idle Air Control Valve is stuck . A good cleaning of the throttle plate and air intake system will possibly cure it.
If it's cold outside, it's because ECU use ambient temperature sensor and coolant sensor to manage RPMs. After you start the car the coolant temperature is low and ECU sets RPMs very high, when it gets warm RPMs drop down until engine reaches operating temperature.
Type your answer here..
Your car will idle high until the engine begins to warm. You could set the idle to be a bit lower, but that may cause the engine to stall out when it's cold out. The engine should begin to lower the RPMs when it is warmed up.
Personally I doubt it, maybe you should check the idle air control motor from my understanding the filter only helps it to breathe better it should not alter idle rpms
fuel injected or carburetor?injected - the idle can be adjusted via a diagnostic computer.carb - you can adjust the idle under the carb very easily.
have you had it serviced recently? your computer may be re-learning its idle pattern if any engine management sensors or devices have been replaced recently.
you need the fast idle adjusted on the engine you may have idle set where it sounds fine in idle but not high enuff when dropped in gear.
The idle position sensor should be checked. Your supercharger may be messed up or your idle speed needs to be set on the fuel injection.
buy a new one
Engines SHOULD idle a little faster during startup, but if it's always idling fast, check for vacuum leaks. Make sure the EGR valve isn't leaking as well.
The newer vehicles with computers do not allow for idle speed adjustment. If yours is one of those vehicles, you will not be able to adjust the idle speed. On the other hand, if the idle speed is very high on one of those vehicles it could be that the engine could have a vacuum leak.
It may be in need of a good tune up.
Try your idle air control valve.
In the very beggining.....
Check the power to your automatic choke and check the choke pulloffs. It sounds as if the fast idle cam is not coming all the way off.
Common problem.. The "Idle Air Control" valve (IAC) is the usual culprit. It is located on the throttle body.
Could be the TPS, it will cause it to idle high and low and make the car become sluggish, but a vehicle will run without one, but it will run very rough.