SSoofast

I,m having surging idle problems.When i come to a stop idle will surge to 2000rpms and slowly settle to 1000 in about 15 sec. I have Efilive and the only thing i can see is timing is dropping to 8-10 degrees at .08 and 800-1000 rpms even though the timing table is at 22 degrees, What could be pulling my timing?I have replaced IAC sensor and TP sensor and no change.

Frost

iTrader: (45)

If you are as stock as your sig, I'd guess an air leak...

darom

iTrader: (2)

Do a search here on 'bucking' which is closely associated with the surging problem. A lot of ideas you can try esp. since you got your own tuning software.

kenp

iTrader: (9)

There is a bunch of stuff on the EFILive forum that addresses this, as well as some in depth discussions in this forum. Do some searching. IDLE

SSoofast

Right you are Frost.Ifound a big hole in the rubber hose connecting the pcv valve to the intake manifold.