You ought to be able to crack a metal line while at idle and find it by observing fluctuation in rpm. Four or five of six should make the idle rougher. The couple that dont are the problems.

__________________
Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)