ok first of I have a 89 crx stock. a couple of days ago i started having this problem where until the car warms up It would bog down and studder. so I thought it was my spark plugs. replaced plugs,wires, dis cap and valve cover gasket. (a little oil in the spark plug) then i started reading my ecu which was giving me codes of 15, 16 changed the o2 sensor then recieved a code of 8 took of the dis cap to find it was broken (one of the filiments snapped off) then checked my error codes and was gettin 8 15 and 4 all on the distributor probally after i disterbed somthing. so i un hooked the battery and it cleared all codes. then i was advised to check the fuel pump cause when the car stalls out or about to stall out it feels like it's not getting gas. anyway i took a reading on the fuel pump connecton it gave me a reading of about 6vdc. any advice

 

fixed it turns out it was a bad ground on the fuel pump itself. thats why i could idle fine but once i started driving i guess it would shake it loose again. so thats why I was stalling out.