Need help diagnosing missfire.

[rëvö ëvöm]

I recently replaced the plugs and wires on my 2001 Jetta 2.0. I was going to do the coil pack too, but the repair shop said that it was in good condition. This was around March. Recently I have noticed that at idle it feels like the car "hiccups" and will shake for a brief moment and the rpms will drop 200-400. It feels to me and my friend that this may be a misfire on one of the cylinders. I do not have any codes thrown now. But I replaced plugs and wires because I had a misfire in cylinders 2 and 4. I replaced it and the problem went away. I am at a loss on what it could be, I searched for similar problems but could not find it. Any tips would be appreciated Thanks.

[racechaser]

Try spraying your coil with spray bottle, it will miss or die if it is bad.

[racechaser]

Spray it with water. Sorry!!

[Anony00GT]

Are you scanning with VCDS or a generic scan tool?

I think this might be idle control moreso than a misfire. Remove the TV, clean it out real good, then re-install and to TBA with VCDS.

[squabeggz]

Are you scanning with VCDS or a generic scan tool?

I think this might be idle control moreso than a misfire. Remove the TV, clean it out real good, then re-install and to TBA with VCDS.

TV? or TB as in Throttle Body?

[WakusPakus]

TV? or TB as in Throttle Body?

lol

yeah man - remove your television from the intake cable box, duh

[Anony00GT]

TV? or TB as in Throttle Body?

Yes.

TV = Throttle Valve
TB = Throttle Body

Same thing, different term. They commonly gum up and the ECU loses control over the target idle. Get a good scan first though.

[squabeggz]

^

[rëvö ëvöm]

thanks guys, the coil was fine. Put in a new tank of gas and it cleared up, so I think it was a bad tank of gas. If it acts up again, I will scan it and check the throttle body.