Alright.. I own a 1990 Acura integra with a b18a1 motor.. i think thats correct, its a dohc but its the non-vtec ls motor. Its been a real reliable car with the exception of battery/alt. problems which are on me. Anyways this car idels weird sometimes when its in drive and at a stop, kind of a rought idel but not to rough. idk if it has to do with the muffler thats on it or not b/c i put it on right after i got the car so i dnt really knw wat it was like.. and wen the car is warmed up and i go to start it up, it will rev high at first,(which i think is normal) but then it goes to a low-low rpm like its gunna die and then to the normal idel.. but y im so worried about it is bc at the gas station the other day it did that but it actully died for the first time! and i had to start it back up.. and my second q is when i go press on the gas to go from a stop, sometimes it acts slugish and dosent take off like it normally should, idk if its dirty injectors or what but it happens rarely. any opinions or advice would be really helpfull. thanks