I have a EK civic with a '95 GS-R (B18c1) USDM and Im having idling problems. When i start my car up wen its cold especially it tends to goin from 2 RPMs-1 1/2 RPMS to 1 RPMs etc. and it really bothers me. These are my other mods that can be important, they are no cat, chip, never been tuned since cars been swapped. i will do this soon tho and I blow black smoke in vtec.