Car Missing

HEY GUYS JUST DID AN S14 SR20DET BLACK TOP INTO MY S13 BUT ITS MISSING AT LIKE 2500 RPM I HAVE NO VACCUM LEAKS COIL PACKS ARE GOOD MAFS IS GOOD. COULD IT BE FUEL?????????
iN THE MORNING OR WHEN THE MOTOR IS COLD I HAVE TO CRANK IT ABOUT 25 TIMES TO GET THE ENGINE STARTED HELP ME PLEASEEEEEEEEEEEEEEEEEEEEE I GOT A MAJOR HEADACHE NEVER TUNE THE CAR. THANKS GUYS

a friend of mine had a problem similar to that. His car would never start in the morning or after a long period of time without cranking several times. I think he said it was the starter. You may want to check that.

man it could be a lot of things. the fuel pump, plugs, wires, dist. cap, dist., ignition coil, etc....ya just going to have to trouble shoot it. It might be timing too. Good luck.

you know you have to run 93 on SR20s Right? highly likely the fuel pump is bad or the spark plugs if you havent already changed em.

id check the the timing and get an upgraded fuel pump.