My 98 sunfire 2200 auto has been acting strange when ideling at stops. The rpms will drop a bit almost as if the car is missing,does this a few times when ideling, almost like a bad shutter( shake) like a hesitation..... but only happens at ideling and only after car has been driven for a tiny bit; will act normal for the first 5-10 minutes after start up in morning.
drives great, no missing when driving; just when stopped.....
I WAS THINKING MAYBE a sensor, throttle position etc?? anyone have a similar issue?
I got new plugs in, tried high test gas, been doing this for about 4 weeks or more.
Thanks for anyhelp you can give.





98 j-body sedan