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I just did a valve job on my squareback this afternoon and once I was done I started up my car and I heard aknocking noise, and it sounded pretty bad. I'm sure it was there before because I've been busy lately and unfortunately haven't spent as much time around the engine when it's been running. The noise is definitely coming from the 3rd cylinder and the only way I can describe it is that it sounds like somebody is hitting a hammer in there. If I let the car idle long enough it will die because the idle surges a bit until it swings low enough to die. Here's the odd part... or so I thought. When I disconnect the injector to cylinder 3, the car starts running "fine" again (fine for running on 3 cylinders) and the idle stays constant - with no knocking. It's almost as if my timing is off on that cylinder which is causing it to fire at a time the cylinder shouldn't be firing, thus its fighting with the cylinder momentum. I just did a valve job and everything was set to .006 (I only had to slightly adjust maybe 3 valves that were loose) so I know the valves are correct. I must add that I'm using Pertronix electronic points, if that adds anything I'm not sure. I'm tempted to drive on down to my mechanic, but I'd like to try to diagnose/fix this on my own first. I just need some help knowing where to start. Thanks, Jacob Schroeder 72 Squareback ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ Shameless link for search engines: http://listarchive.type3.org ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~