Heres the deal.... i recently bought a 1993 civic cx (hatchback) and it has a d15b non-vtec motor and tranny from a 1993 dx coupe

when i start the car in the morning it idles really high.. then when it starts to warm up (aprox 3-4 minutes later) it gets a really jumpy idle and it quits most of the time... and when its completly warmed up it idles perfect....

i dont know what would cause this... also if i go to start it later in the day it still does the jumpy idle or wont start at all.... today i cant seem to get it started no matter what i do... i checked all the fuses and all of them are fine

also when i go to start it and it does start to run it sputters really bad then quits... until car is warmed up

it gets fuel and spark so i think it has something to do with a sensor