Civic EG

i do not know goes here and it fucks with my idle like if i dont hit the gas it cuts out

to be honest i have no idea either but im sure its a major vaccum leak.....

thusly thats why you gotta hit the gas to keep it running....id suggest either finding a bolt that bolts in there if theres threads....or figure out a way to plug it up....

but i think with a search o ebay i found out what went there this sensor....
http://cgi.ebay.com/ebaymotors/B18B1-IN ... 3efcb2c009

dont knwo the sensor but it looks like that lol possibly purge solinoid

when there is a bolt in there a have to hit the gas but when there is nothing it revs so high and stays there i dont no what to do

That's the EVAP control purge solenoid on the OBD-II B18B1. (I have a '97 Teg.)

Without it, you'll throw a code for it unless you have a chipped ECU.