weird sr stumbling problem!

[jdm_s14_zenki]

i replaced my bov yesterday cus there was a leak in my old one. now it idles better but now i have another problem.

At cold start idling, it will idle a little above 1k rpm which is fine, but every 5 seconds or so it will stumble a little bit. you can hear the exhaust kind of burping.. it keeps doing that at idle until i drive the car around a little while.

i wonder if my plugs are fouled? i checked them a couple days ago and they were fine..what else could it be?

also, when i restart my car when the engine is warm, the engine almost dies then comes right back up, then idle goes down again, then smooths out after i give it a little gas..ive learned to deal with it just by hitting the gas a little after i start the car..its annoying though knowing theres something not quite right.

Let me know what you guys think! thanks.