Really Rough Idle after Rebuild
Ok rebuilt the engine recently, herea are the Mods on the car.
Car is a 2G
1G bottom end
2G head (rebuilt by DSM graveyard)
big 16G turbo
walbro 255cc fuel rail
The car started up fine on the first try, there was a little bit of white smoke out the exhaust but that went away i ran the car for a few minutes.the car had high idle, but everything sounded good. the car heated up to normal temperture and would bogged down. i thought this was normal because i figured it just needed to be tuned. when i came home from work and went to start her, she was hesitant and the idle was real sloppy. plus i saw what looked like a small amount of vapor/smoke coming from behind the intake. i imeadiately did a compression check , there were between 165-175 across the board, so that was good, i then did a boost leak test and found that i have a crack in my VC, im replacing that tonight after i get home. one other thing, i noticed the grey vapor by the intake when i cranked the engine but couldnt tell where its was comming from.
any ideas why the idle is so erradic and wont stay started?