Timing/Misfiring issues?

[aziankingz]

I've been having issues lately and was wondering if it can be due to the timing being off.. at startup..it takes a while for it to start up..it would crank for a few seconds (3-5 seconds), then slowly start up, but once started it would be good. When taking off in first gear down the street, once reaching to 2000 - 2200rpms, the car would feel like its hitting a wall and get jerky while accelerating until i change to second gear and all would be fine.. this only happens when cold and once it is warmed up its fine. I also just changed my spark plugs, wires, newly used distributor, used MAF, used CTS, o2 sensor and seafoamed the car and it still misfires, as well as jumpy idle (idle would coast around 800-900). Another issue i noticed is the spark plug holes for #1 and #4 is crossthreaded and doesnt fully go in!! Please helpppp...
Modified by aziankingz at 11:45 AM 8/19/2008

[zstylelowrider]

First thing I would try is checking compression. Especially on the cylinders that you say are cross threaded. This could be the biggest part of your problem.

[Vegascorbin]

What he said.

Allways start with what you know to be bad and fix that before you start looking for other things.