I get excessive shudder almost like a misfire on a gasser. Here's the situation.got the 99.5 Jetta in March with 100k mi, has had an idle 'shudder' ever since. Great writeup NB, I've seen this post awhile ago thinking that I'd never have to do this, and I think I just may.anyone ever heard of an idle shudder (not slow down)? Then locate the three T3 bolts we will be dealing with. Step three Remove your engine cover, if you have one. Step two Warm up the car, take 'er for a spin you want your IQ to be where it's normally at when you are all warmed up. If it's a different value set it back to '32768' click 'test' then click 'save'. If it says '32768 then it's fine to procede. Now you can actually see your IQ and it's value. Click the 'Login' button and enter '12233'. To check this connect VCDS to your running car and head into the engine controller. If it is reset it back to the 'stock' value. Step one Ensure via VCDS that your IQ isn't adjusted software wise. Pictures help me with mods, so hopefully they can help you. I simply performed it twice myself so I took pictures this time and figured I'd share the information I gathered with everyone. First I'm not trying to steal anyone's thunder.
