k ...i have a 91 civic se 1.5l and recently it has been having trouble idling like it wont die but when i first turn the car on the rpms will go up to about 1500 then down to 500, up then down and so on, until i give it a couple of quick shots of gas and then it will run fine, i have recently replaced plugs, wires, cap, rotor, fuel filter, oh and also the altenator (approx. 6months ago). could this be a fuel pump issue?? the pump seems to be working because when i turn the key forward without starting the car i can hear it for like 5sec then it stops so i know its getting up to pressure..also occasionaly when im at a light the rpms drop to the point that im about to stall but then jumps back up to normal,...now i do have a short ram intake and "performance" muffler i dont know if these are to blame for this issue , i dont think so because it has run fine while these were on , anywayz sorry for the long post i just really want to get this straightened out before it becomes a real issue. so yeah if any1 thinks they know what the issue is and how i could fix it. i would greatly appreciate your input