tndds

http://www.youtube.com/watch?v=yd2zoIrFSP8

This problem started happening a month ago, only from cold starts and not all the time. I press the ignition and the car turns over but it sounds like crap and the whole car shakes. After I give it some gas, it idles right. The car drives normally and starts up normally when hot. The CEL comes on due to misfires. I changed the spark plugs and I did a compression test...about 230 all cylinders. Thoughts?

rob-2

After spark plugs changed? Still misfiring?
Did you try moving or checking the coil packs?
What error code did you get?
What's done to the car?

tndds

I haven't pulled codes after changing spark plugs, I'll do that soon. I haven't checked the coil packs yet. There was misfire in cylinder 3,4 and a coolant circuit code.

The car has been stock for a couple years, previously supercharged. I rebuild the head and a couple pistons were replaced after I got metal in my engine. The mechanic had a spare engine he used as a donor. The car has been driven stock without any problems for a while.