Annoying Little Idle Dip

[rogue55]

The car is a 94 Civic with a LS/vtec(GSR head). I'm almost finished breaking it in. When I am coming up to a stop, and let off the gas while in neutral or clutch just depressed, the engine rpms fall below optimum idle for a breif moment before recovering. It has almost stalled on me once. Usually the idle gets just low enough for the headlights to dim and the blower motor to slow down. Like I said, it bounces right back to normal very quickly, but it is bothersome. There are no other symptoms, car pulls fine, and idles smooth at all other times. I have a few guesses but I wanna hear what you guys think. I know the timing and the valve adjustment is right. I might recheck the ign. timing again though. I am running a stock GSR basemap right now in my ecu, so it may be that I just need to get a tune, which is what I need to do anyway. Also, I have not adjusted the actual idle screw. I am thinking that since it idles normally almost all of the time, that it should be fine. Perhaps the IACV is sticking? I hate messing with those! Let me know what you guys think. Thanks.

[slostang]

my car does the same thing and I have a bone stock d15b7.

[VickNotic]

[VickNotic]

well as long as it's not a bigg issue! as long as it's not jumping up & down from 1krpm to 2krpm your good and u dont need to worry bout that, and the iacv, the way i see it is if it's nothing big DONT touch it.. if it dont bother anything else besides you then, leave it be.. If it's not Broken, Dont Fix it ..

[scttydb411]

it's a basemap...it needs to be tuned. i don't recommend breaking them in w/ basemaps. you're better off tuning/breaking in on the dyno than you are w/ an extended break in period w/ a basemap (untuned).