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Message: <blockquote data-quote="95gtSteve" data-source="post: 1118082" data-attributes="member: 17813">Hello group!!!No MIL light.....Well finally got the rubber tank/filler neck seal in, can fill up now, YEAH! So, Sunday (2 days after the filler neck) Sally begins to surge at  idle, not much, but noticeable. I can feel vibrations from the engine  all the way to 4k, which is my normal shift daily driving. Serious  shakes... New plugs, wires, gold cap/rotor. 'zone tells me fuel pressure. Remove  the vacuum line from the regulator, radical change as I expected. Rule  that one out. Pop a small screwdriver down the fuel rail valve- GOT  PRESSURE! Ok, lost now, acts like the dampner is toast, but nope, it's solid. 180k  miles, did my cam go flat? IAC has been bypassed....long story...I went to the 'zone today and warrantied new plugs and wires. Same  result. Shakes at 2k like crazy....I can see motor mounts in the  future....Anyway, I just replaced the tank filler neck seal 4 days ago. Ran like a  raped ape Saturday....85-90 no problem, get some rubber out of 1st.  Overnight it went nuts. Checked for vacuum leaks, loose connectors, etc.  Possible Ignition Module or maybe a I jumped a tooth on the timing  gears? ICM?I'm stuck.....throw me a bone!!!!</blockquote>