Idling problem and missfire

[ALP584]

I have a weird idling problem plus on top of that the car shakes like it missfires when its idling up and down from 1k to 1.5 k i put new plugwires on the plugs are ngks almost new the biss screw was adjusted according to vfaq i even checked the isc i dont know what causes it i tried almost everything other than replacing the distributor so any help is appreciated

 

[TalonR]

You know, I have had this problem for a really long time. And I cant think of anything I havent checked. It is getting really annoying. Sorry for jumping in on your thread, but if anyone has any ideas. Pass them along.....

 

[TalonR]

I am really starting to think no one else has expirenced any problem like this.....

 

[dsmjedi1]

does the engine shake alot?? try cleaning the egr it will get clogged with carbon and exhaust build up and cause a small misfire and idle surging. if the engine shakes alot and you'll know what i mean by alot. then you may have broken the balance belt. just a thought good luck!

 

[harjms]

My engine likes to have the idle surge too...it sucks. I am getting an IAC and maybe that will cure it. If not then i am gonna do NGK plugs...get rid of my bosch crappie platniums, wires, and O2 sensor. My engine at idle shakes every once in a while ...it feels like after each rotation or whatever....like everytime u start it up it moves...well its kinda like that....just every 4 seconds or w/e...mostly when the idle surges to about 400 rpms... I did my timing belt and balance shaft belt about 2000 miles ago...I dont know if i trust my work though. Also when driving at a constant rpm u can feel it buck a little bit every once in a while....(as in every 5-10 secs...maybe misfire?) according to my gauge its at the last rich bar on it so maybe need new O2 sensor...if any ideas...plz let me know