1998 Honda Accord Car will not stay running after timing be

It's a long story but here we go.
Car was getting poor gas milage (21 vice 26 mpg city) and idling rough. I changed the timing belt/balancer belt and WP(last change was 100Kmiles ago). Car ran great the first day. Second day car ran rough and then just quit. I rechecked the timing and noticed I had not tightened the camshaft sproket all the way. I feared it slipped and damaged the valves. With all the belts still on, I tightened it, spun the engine by hand several times and all the timing and balance marks were still correct. I also spun the engine with the starter, all marks still correct. If left to sit, the car will start with some effort and run rough at low RPM. When engine is cold, I must keep 2500RMP. At 2500 rpm it runs pretty smooth all things considered. After running for a few moments, the car will "drop dead" (no sputtering, surging, etc) when you take your foot off the gas. After which the car not start unless you jump it. After running for a minute or two, OBD codes P0300, P0301 and P0302 register. I have done a rudamentary compression check (pull all plug wires, three plugs in and tester hose) and #1, 2, and 3 cylinder show ZERO compression. #4 shows 175-180. I've done this several times with the same result. I hope I'm doing the check wrong.
EGR valve, both O2 sensors replaced within 5000 miles ago.
Any ideas?